eclipse启动时报错,求解决方法

网上解决的方法我都试了下,还是不行!![![图片说明](https://img-ask.csdn.net/upload/201712/29/1514532222_580505.png)图片说明](https://img-ask.csdn.net/upload/201712/29/1514532204_873316.png)图片说明

48个回答

重新安装jdk8,或者重新装eclipse

JDK1.7不适合,需要安装JDK1.8.安装完记得重新配置一下环境。如果你的Eclipse不能支持JDK1.8,那你还需要重新安装一个适合JDK1.8版本的Eclipse

eclipse与jdk版本不匹配,重新换一个eclipse版本

提示很明显,技术这个东西要自己多专研,英文阅读能力也是必不可少的
下载低版本Eclipse
安装配置JDK1.8 或 更高版本

英文提示的很详细。就是说你的jvm的1.7._0_75版本不适合这个产品版本:需要1.8或更高版本。

JDK版本太低了 换新的

JVM的版本和你eclipse的版本不匹配,重装高版本的JDK吧

jdk版本太低了,换个高点的试试,修改eclispe.ini里的路径,指向高版本

共48条数据 首页 ... 2 3 5
Csdn user default icon
上传中...
上传图片
插入图片
抄袭、复制答案,以达到刷声望分或其他目的的行为,在CSDN问答是严格禁止的,一经发现立刻封号。是时候展现真正的技术了!
其他相关推荐
eclipse启动tomcat时报错是怎么回事,我之前运行也没事
弹出的提示框里是:Server Tomcat v9.0 Server at localhost failed to start. eclipse控制台出现的是:-Djava.endorsed.dirs=F:\apache-tomcat-9.0.12\endorsed is not supported. Endorsed standards and standalone APIs in modular form will be supported via the concept of upgradeable modules. 我的tomcat是一个文件,然后用eclipse配置上去的 和这个问题好像差不多,但是不知道怎么解决https://bbs.csdn.net/topics/391847806 但是电脑重启没用,还是报错 在eclipse修改server的端口号也没用
spring boot项目启动时报错?
请问这个异常如何解决? Description: An attempt was made to call the method org.apache.coyote.AbstractProtocol.setAcceptCount(I)V but it does not exist. Its class, org.apache.coyote.AbstractProtocol, is available from the following locations: jar:file:/C:/apache-tomcat-8.0.50/lib/tomcat-coyote.jar!/org/apache/coyote/AbstractProtocol.class jar:file:/C:/Users/%e5%b0%8f%e6%96%b0/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.13/tomcat-embed-core-9.0.13.jar!/org/apache/coyote/AbstractProtocol.class It was loaded from the following location: file:/C:/apache-tomcat-8.0.50/lib/tomcat-coyote.jar Action: Correct the classpath of your application so that it contains a single, compatible version of org.apache.coyote.AbstractProtocol
myeclipse中启动tomcat报错
![图片说明](https://img-ask.csdn.net/upload/201603/18/1458286600_872674.png)在myeclipse中启动tomcat时报错,不知道怎么解决,请网友指点;报错信息如下Deployment is out of date due to changes in the underlying project contents.You'll need to 'Redeploy' the project to update the deployed archive; 警告提示是:构建路径指定执行环境 JavaSE-1.6。工作空间中没有与此环境严格兼容的 JRE。
32为Linux安卓AVD启动报错
Andoid的朋友,在吗?请教个问题。 我启动Adnroid的AVD时报错如下: Starting emulator for AVD 'qq' ERROR: 32-bit Linux Android emulator binaries are DEPRECATED, to use them you will have to do at least one of the following: - Use the '-force-32bit' option when invoking 'emulator'. - Set ANDROID_EMULATOR_FORCE_32BIT to 'true' in your environment. Either one will allow you to use the 32-bit binaries, but please be aware that these will disappear in a future Android SDK release. Consider moving to a 64-bit Linux system before that happens. 我的系统是: ubuntu 10.4, jdk 1.7 adt-bundle-windows-x86-20140702.zip, eclipse就是adt压缩文件中的打包文件。 网上找了仅有的几个解决办法,都不好使。 是不是也是跟你类似的问题呢? 若有解答请回复:1790447697@qq.com.cn。 谢谢。
Spring boot 项目启动因为@value报错Injection of autowired dependencies failed
## Spring boot项目启动时报错—— ## Injection of autowired dependencies failed ## ## ## Could not resolve placeholder 'owa.url' in string value "${owa.url}" ## ## ## ![图片说明](https://img-ask.csdn.net/upload/201902/28/1551351377_216263.png) ## ## ![图片说明](https://img-ask.csdn.net/upload/201902/28/1551351505_690876.png) ## ## ## 定义的owa.url是在application.properties文件当中,并木有问题 ## ## 因为@Value注解的原因, ## 但实际上是自己不小心删掉了pom.xml文件里面的一些内容, ## 其余的文件没有改动 ## ## 就是不知道是改了pom.xml文件中的那些信息了, ## 希望告知是缺少了pom.xml中的哪一部分依赖问题, ## 麻烦帮忙解决一下,谢谢!
Disable Maven Nature恢复
eclipse项目中不小心点了Disable Maven Nature, 转成maven项目后, 在启动tomcat时报如下错误: ``` 严重: Error configuring application listener of class org.springframework.web.util.Log4jConfigListener java.lang.ClassNotFoundException: org.springframework.web.util.Log4jConfigListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:506) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:488) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:115) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4909) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) ``` 后来查了很多资料都不能解决我的问题! 最后在项目->Properties->Deployment Assembly ->add ->java Build Path Entries ->Maven Dependencies 把需要的maven jar包发布到lib下! 就可以了!
求助!!wildfly单机部署war包时启动失败,报错。
我是在idea把正常运行的项目打成war包放在了wildfly(10和17两个版本都试了)的standalone\deployments目录下,然后直接运行standalone.bat的。启动时报错,无法加载bean。但是放到tomcat可以正常启动运行。 查遍中外文档和提问,还是没有解决。日志信息如下。 ``` 2019-06-13 14:20:54,155 INFO [org.jboss.modules] (main) JBoss Modules version 1.9.1.Final 2019-06-13 14:20:54,643 INFO [org.jboss.msc] (main) JBoss MSC version 1.4.7.Final 2019-06-13 14:20:54,653 INFO [org.jboss.threads] (main) JBoss Threads version 2.3.3.Final 2019-06-13 14:20:54,752 INFO [org.jboss.as] (MSC service thread 1-2) WFLYSRV0049: WildFly Full 17.0.0.Final (WildFly Core 9.0.1.Final) starting 2019-06-13 14:20:54,753 DEBUG [org.jboss.as.config] (MSC service thread 1-2) Configured system properties: awt.toolkit = sun.awt.windows.WToolkit file.encoding = GBK file.encoding.pkg = sun.io file.separator = \ java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment java.awt.printerjob = sun.awt.windows.WPrinterJob java.class.path = D:\widefly\wildfly-17.0.0.Final\jboss-modules.jar java.class.version = 52.0 java.endorsed.dirs = D:\jdk1.8\jre\lib\endorsed java.ext.dirs = D:\jdk1.8\jre\lib\ext;C:\Windows\Sun\Java\lib\ext java.home = D:\jdk1.8\jre java.io.tmpdir = C:\Users\Lenovo\AppData\Local\Temp\ java.library.path = D:\jdk1.8\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;D:\jdk1.8\bin;D:\jdk1.8\jre\bin;C:\Program Files\TortoiseSVN\bin;D:\Maven\apache-maven-3.3.9\bin;D:\widefly\wildfly-17.0.0.Final\bin;C:\Users\Lenovo\AppData\Local\Programs\Python\Python37\Scripts\;C:\Users\Lenovo\AppData\Local\Programs\Python\Python37\;C:\Users\Lenovo\AppData\Local\Microsoft\WindowsApps;;. java.net.preferIPv4Stack = true java.runtime.name = Java(TM) SE Runtime Environment java.runtime.version = 1.8.0_211-b12 java.specification.name = Java Platform API Specification java.specification.vendor = Oracle Corporation java.specification.version = 1.8 java.util.logging.manager = org.jboss.logmanager.LogManager java.vendor = Oracle Corporation java.vendor.url = http://java.oracle.com/ java.vendor.url.bug = http://bugreport.sun.com/bugreport/ java.version = 1.8.0_211 java.vm.info = mixed mode java.vm.name = Java HotSpot(TM) 64-Bit Server VM java.vm.specification.name = Java Virtual Machine Specification java.vm.specification.vendor = Oracle Corporation java.vm.specification.version = 1.8 java.vm.vendor = Oracle Corporation java.vm.version = 25.211-b12 javax.management.builder.initial = org.jboss.as.jmx.PluggableMBeanServerBuilder jboss.home.dir = D:\widefly\wildfly-17.0.0.Final jboss.host.name = desktop-e1tfeli jboss.modules.dir = D:\widefly\wildfly-17.0.0.Final\modules jboss.modules.system.pkgs = org.jboss.byteman jboss.node.name = desktop-e1tfeli jboss.qualified.host.name = desktop-e1tfeli jboss.server.base.dir = D:\widefly\wildfly-17.0.0.Final\standalone jboss.server.config.dir = D:\widefly\wildfly-17.0.0.Final\standalone\configuration jboss.server.data.dir = D:\widefly\wildfly-17.0.0.Final\standalone\data jboss.server.deploy.dir = D:\widefly\wildfly-17.0.0.Final\standalone\data\content jboss.server.log.dir = D:\widefly\wildfly-17.0.0.Final\standalone\log jboss.server.name = desktop-e1tfeli jboss.server.persist.config = true jboss.server.temp.dir = D:\widefly\wildfly-17.0.0.Final\standalone\tmp line.separator = logging.configuration = file:D:\widefly\wildfly-17.0.0.Final\standalone\configuration/logging.properties module.path = D:\widefly\wildfly-17.0.0.Final\modules org.jboss.boot.log.file = D:\widefly\wildfly-17.0.0.Final\standalone\log\server.log org.jboss.resolver.warning = true os.arch = amd64 os.name = Windows 10 os.version = 10.0 path.separator = ; program.name = standalone.bat sun.arch.data.model = 64 sun.boot.class.path = D:\jdk1.8\jre\lib\resources.jar;D:\jdk1.8\jre\lib\rt.jar;D:\jdk1.8\jre\lib\sunrsasign.jar;D:\jdk1.8\jre\lib\jsse.jar;D:\jdk1.8\jre\lib\jce.jar;D:\jdk1.8\jre\lib\charsets.jar;D:\jdk1.8\jre\lib\jfr.jar;D:\jdk1.8\jre\classes sun.boot.library.path = D:\jdk1.8\jre\bin sun.cpu.endian = little sun.cpu.isalist = amd64 sun.desktop = windows sun.io.unicode.encoding = UnicodeLittle sun.java.command = D:\widefly\wildfly-17.0.0.Final\jboss-modules.jar -mp D:\widefly\wildfly-17.0.0.Final\modules org.jboss.as.standalone -Djboss.home.dir=D:\widefly\wildfly-17.0.0.Final sun.java.launcher = SUN_STANDARD sun.jnu.encoding = GBK sun.management.compiler = HotSpot 64-Bit Tiered Compilers sun.os.patch.level = sun.stderr.encoding = ms936 sun.stdout.encoding = ms936 user.country = CN user.dir = D:\widefly\wildfly-17.0.0.Final\bin user.home = C:\Users\Lenovo user.language = zh user.name = Lenovo user.script = user.timezone = Asia/Shanghai user.variant = 2019-06-13 14:20:54,754 DEBUG [org.jboss.as.config] (MSC service thread 1-2) VM Arguments: -Dprogram.name=standalone.bat -Xms128M -Xmx2048M -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=512m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Dorg.jboss.boot.log.file=D:\widefly\wildfly-17.0.0.Final\standalone\log\server.log -Dlogging.configuration=file:D:\widefly\wildfly-17.0.0.Final\standalone\configuration/logging.properties 2019-06-13 14:20:55,611 INFO [org.wildfly.security] (ServerService Thread Pool -- 28) ELY00001: WildFly Elytron version 1.9.1.Final 2019-06-13 14:20:56,314 INFO [org.jboss.as.controller.management-deprecated] (Controller Boot Thread) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/core-service=management/management-interface=http-interface' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation. 2019-06-13 14:20:56,336 INFO [org.jboss.as.controller.management-deprecated] (ServerService Thread Pool -- 11) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/subsystem=undertow/server=default-server/https-listener=https' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation. 2019-06-13 14:20:57,497 INFO [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0039: Creating http management service using socket-binding (management-http) 2019-06-13 14:20:57,511 INFO [org.xnio] (MSC service thread 1-6) XNIO version 3.7.2.Final 2019-06-13 14:20:57,518 INFO [org.xnio.nio] (MSC service thread 1-6) XNIO NIO Implementation Version 3.7.2.Final 2019-06-13 14:20:57,546 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 51) WFLYCLINF0001: Activating Infinispan subsystem. 2019-06-13 14:20:57,550 INFO [org.wildfly.extension.microprofile.config.smallrye._private] (ServerService Thread Pool -- 60) WFLYCONF0001: Activating WildFly MicroProfile Config Subsystem 2019-06-13 14:20:57,559 INFO [org.wildfly.extension.microprofile.opentracing] (ServerService Thread Pool -- 63) WFLYTRACEXT0001: Activating MicroProfile OpenTracing Subsystem 2019-06-13 14:20:57,560 WARN [org.jboss.as.txn] (ServerService Thread Pool -- 72) WFLYTX0013: The node-identifier attribute on the /subsystem=transactions is set to the default value. This is a danger for environments running multiple servers. Please make sure the attribute value is unique. 2019-06-13 14:20:57,589 INFO [org.jboss.as.webservices] (ServerService Thread Pool -- 74) WFLYWS0002: Activating WebServices Extension 2019-06-13 14:20:57,595 INFO [org.wildfly.extension.io] (ServerService Thread Pool -- 52) WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors 2019-06-13 14:20:57,598 INFO [org.wildfly.extension.microprofile.health.smallrye] (ServerService Thread Pool -- 61) WFLYHEALTH0001: Activating Eclipse MicroProfile Health Subsystem 2019-06-13 14:20:57,599 INFO [org.jboss.as.naming] (ServerService Thread Pool -- 64) WFLYNAM0001: Activating Naming Subsystem 2019-06-13 14:20:57,611 INFO [org.jboss.as.security] (ServerService Thread Pool -- 70) WFLYSEC0002: Activating Security Subsystem 2019-06-13 14:20:57,621 INFO [org.jboss.as.jaxrs] (ServerService Thread Pool -- 53) WFLYRS0016: RESTEasy version 3.7.0.Final 2019-06-13 14:20:57,626 INFO [org.jboss.as.jsf] (ServerService Thread Pool -- 58) WFLYJSF0007: Activated the following JSF Implementations: [main] 2019-06-13 14:20:57,635 INFO [org.jboss.as.connector] (MSC service thread 1-7) WFLYJCA0009: Starting JCA Subsystem (WildFly/IronJacamar 1.4.16.Final) 2019-06-13 14:20:57,637 INFO [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 43) WFLYJCA0004: Deploying JDBC-compliant driver class org.h2.Driver (version 1.4) 2019-06-13 14:20:57,639 INFO [org.jboss.as.security] (MSC service thread 1-3) WFLYSEC0001: Current PicketBox version=5.0.3.Final 2019-06-13 14:20:57,645 INFO [org.wildfly.extension.microprofile.metrics.smallrye] (ServerService Thread Pool -- 62) WFLYMETRICS0001: Activating Eclipse MicroProfile Metrics Subsystem 2019-06-13 14:20:57,719 INFO [io.smallrye.metrics] (MSC service thread 1-2) Converted [2] config entries and added [4] replacements 2019-06-13 14:20:57,727 INFO [org.wildfly.extension.undertow] (MSC service thread 1-6) WFLYUT0003: Undertow 2.0.21.Final starting 2019-06-13 14:20:57,730 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-4) WFLYJCA0018: Started Driver service with driver-name = h2 2019-06-13 14:20:57,735 INFO [io.smallrye.metrics] (MSC service thread 1-2) Converted [3] config entries and added [14] replacements 2019-06-13 14:20:57,755 INFO [org.jboss.as.naming] (MSC service thread 1-4) WFLYNAM0003: Starting Naming Service 2019-06-13 14:20:57,786 INFO [org.jboss.remoting] (MSC service thread 1-6) JBoss Remoting version 5.0.12.Final 2019-06-13 14:20:57,786 INFO [org.jboss.as.mail.extension] (MSC service thread 1-4) WFLYMAIL0001: Bound mail session [java:jboss/mail/Default] 2019-06-13 14:20:57,871 INFO [org.wildfly.extension.undertow] (ServerService Thread Pool -- 73) WFLYUT0014: Creating file handler for path 'D:\widefly\wildfly-17.0.0.Final/welcome-content' with options [directory-listing: 'false', follow-symlink: 'false', case-sensitive: 'true', safe-symlink-paths: '[]'] 2019-06-13 14:20:57,930 INFO [org.jboss.as.ejb3] (MSC service thread 1-4) WFLYEJB0482: Strict pool mdb-strict-max-pool is using a max instance size of 32 (per class), which is derived from the number of CPUs on this host. 2019-06-13 14:20:57,930 INFO [org.jboss.as.ejb3] (MSC service thread 1-2) WFLYEJB0481: Strict pool slsb-strict-max-pool is using a max instance size of 128 (per class), which is derived from thread worker pool sizing. 2019-06-13 14:20:57,962 INFO [org.wildfly.extension.undertow] (MSC service thread 1-6) WFLYUT0012: Started server default-server. 2019-06-13 14:20:57,970 INFO [org.wildfly.extension.undertow] (MSC service thread 1-7) WFLYUT0018: Host default-host starting 2019-06-13 14:20:58,046 INFO [org.wildfly.extension.undertow] (MSC service thread 1-3) WFLYUT0006: Undertow HTTP listener default listening on 127.0.0.1:8080 2019-06-13 14:20:58,105 INFO [org.jboss.as.ejb3] (MSC service thread 1-7) WFLYEJB0493: EJB subsystem suspension complete 2019-06-13 14:20:58,173 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-8) WFLYJCA0001: Bound data source [java:jboss/datasources/ExampleDS] 2019-06-13 14:20:58,278 INFO [org.jboss.as.patching] (MSC service thread 1-8) WFLYPAT0050: WildFly Full cumulative patch ID is: base, one-off patches include: none 2019-06-13 14:20:58,294 INFO [org.jboss.as.server.deployment.scanner] (MSC service thread 1-1) WFLYDS0013: Started FileSystemDeploymentService for directory D:\widefly\wildfly-17.0.0.Final\standalone\deployments 2019-06-13 14:20:58,303 INFO [org.jboss.as.server.deployment] (MSC service thread 1-7) WFLYSRV0027: Starting deployment of "jeeplus.war" (runtime-name: "jeeplus.war") 2019-06-13 14:20:58,561 INFO [org.wildfly.extension.undertow] (MSC service thread 1-1) WFLYUT0006: Undertow HTTPS listener https listening on 127.0.0.1:8443 2019-06-13 14:20:58,636 INFO [org.jboss.ws.common.management] (MSC service thread 1-6) JBWS022052: Starting JBossWS 5.3.0.Final (Apache CXF 3.3.2) 2019-06-13 14:22:01,638 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry xbean.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/batik-js-1.7.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,652 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry avalon-framework-4.2.0.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,652 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry batik-all-1.6.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,653 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry commons-io-1.3.1.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,654 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry commons-logging-1.0.4.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,655 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry fop-hyph.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,655 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry jai_codec.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,656 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry jai_core.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,656 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry jimi.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,657 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry serializer-2.7.0.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,657 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry servlet-2.2.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,658 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry xalan-2.7.0.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,662 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry xercesImpl-2.7.1.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,664 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry xml-apis-1.3.02.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,664 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry xmlunit1.0.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/fop-0.94.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,676 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry ridl.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/juh-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,676 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry jurt.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/juh-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,677 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry ridl.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/jurt-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,678 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry unoloader.jar in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/jurt-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,678 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry ../../lib/ in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/jurt-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:01,679 WARN [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0059: Class Path entry ../bin/ in /D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/lib/jurt-2.3.0.jar does not point to a valid jar for a Class-Path reference. 2019-06-13 14:22:03,113 WARN [org.jboss.as.ee] (MSC service thread 1-7) WFLYEE0007: Not installing optional component org.springframework.http.server.ServletServerHttpAsyncRequestControl due to an exception (enable DEBUG log level to see the cause) 2019-06-13 14:22:03,113 WARN [org.jboss.as.ee] (MSC service thread 1-7) WFLYEE0007: Not installing optional component org.springframework.web.context.request.async.StandardServletAsyncWebRequest due to an exception (enable DEBUG log level to see the cause) 2019-06-13 14:22:03,151 INFO [org.infinispan.factories.GlobalComponentRegistry] (MSC service thread 1-8) ISPN000128: Infinispan version: Infinispan 'Infinity Minus ONE +2' 9.4.14.Final 2019-06-13 14:22:03,202 WARN [org.jboss.as.jaxrs] (MSC service thread 1-7) WFLYRS0018: Explicit usage of Jackson annotation in a JAX-RS deployment; the system will disable JSON-B processing for the current deployment. Consider setting the 'resteasy.preferJacksonOverJsonB' property to 'false' to restore JSON-B. 2019-06-13 14:22:03,206 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0004: Deploying JDBC-compliant driver class com.alibaba.druid.proxy.DruidDriver (version 4.0) 2019-06-13 14:22:03,213 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0004: Deploying JDBC-compliant driver class com.alibaba.druid.mock.MockDriver (version 0.0) 2019-06-13 14:22:03,214 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0004: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3) 2019-06-13 14:22:03,216 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0005: Deploying non-JDBC-compliant driver class net.sourceforge.jtds.jdbc.Driver (version 1.3) 2019-06-13 14:22:03,224 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0005: Deploying non-JDBC-compliant driver class com.mysql.cj.jdbc.Driver (version 8.0) 2019-06-13 14:22:03,228 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0005: Deploying non-JDBC-compliant driver class org.postgresql.Driver (version 42.1) 2019-06-13 14:22:03,229 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0005: Deploying non-JDBC-compliant driver class org.apache.solr.client.solrj.io.sql.DriverImpl (version 1.0) 2019-06-13 14:22:03,269 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-3) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_org.h2.Driver_1_3 2019-06-13 14:22:03,270 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-3) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_net.sourceforge.jtds.jdbc.Driver_1_3 2019-06-13 14:22:03,270 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-2) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_com.alibaba.druid.proxy.DruidDriver_4_0 2019-06-13 14:22:03,271 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-4) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_com.mysql.cj.jdbc.Driver_8_0 2019-06-13 14:22:03,270 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-7) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_com.alibaba.druid.mock.MockDriver_0_0 2019-06-13 14:22:03,271 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-1) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war 2019-06-13 14:22:03,276 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-6) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_org.apache.solr.client.solrj.io.sql.DriverImpl_1_0 2019-06-13 14:22:03,277 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-6) WFLYJCA0018: Started Driver service with driver-name = jeeplus.war_org.postgresql.Driver_42_1 2019-06-13 14:22:03,471 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 78) WFLYCLINF0002: Started client-mappings cache from ejb container 2019-06-13 14:22:03,586 INFO [io.undertow.servlet] (ServerService Thread Pool -- 111) No Spring WebApplicationInitializer types detected on classpath 2019-06-13 14:22:03,600 INFO [io.undertow.servlet] (ServerService Thread Pool -- 111) Set web app root system property: 'webapp.root' = [D:\widefly\wildfly-17.0.0.Final\standalone\tmp\vfs\temp\temp5858f9dbed7b899b\content-8652ab40c8a74b5c] 2019-06-13 14:22:03,603 INFO [io.undertow.servlet] (ServerService Thread Pool -- 111) Initializing log4j from [classpath:properties/log4j.properties] 2019-06-13 14:22:08,112 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'actMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/act/mapper/ActMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 2019-06-13 14:22:09,473 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'actNodeSetingInfoMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/act/mapper/ActNodeSetingInfoMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 2019-06-13 14:22:10,806 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'actSetingInfoMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/act/mapper/ActSetingInfoMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 2019-06-13 14:22:11,979 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testPieClassMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/echarts/mapper/other/TestPieClassMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 2019-06-13 14:22:13,133 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'TExamQusetionUserMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/examque/mapper/TExamQusetionUserMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 2019-06-13 14:22:14,159 WARN [org.springframework.beans.factory.support.DefaultListableBeanFactory] (ServerService Thread Pool -- 111) Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'examQuestionMapper' defined in VFS resource ["/D:/widefly/wildfly-17.0.0.Final/bin/content/jeeplus.war/WEB-INF/classes/com/jeeplus/modules/examquestion/mapper/ExamQuestionMapper.class"]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException ``` ![报错信息1](https://img-ask.csdn.net/upload/201906/13/1560407452_637434.png) ![报错信息2](https://img-ask.csdn.net/upload/201906/13/1560407517_691665.png)
有关配置问题application
启动Myeclipse项目时报了这个错:org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in ServletContext resource [/WEB-INF/spring/base.xml]: Could not resolve placeholder 'jdbc.driver',请问怎样解决
做了一个简单的SSH应用,但启动tomcat时总抛NoClassDefFoundError异常
做了一个简单的SSH应用,但启动tomcat时总抛NoClassDefFoundError异常。 <br />会有<pre name="code" class="java">java.lang.ClassNotFoundException: javax.transaction.TransactionManager</pre> <br />各位一定要帮看看啊!(ssh未入门级) <br /> <br />开发工具:Eclipse3.2+Tomcat5.5+Mysql5.0 <br />建表 <br /><pre name="code" class="java">CREATE TABLE `people` ( `id` int(11) NOT NULL auto_increment, `name` varchar(100) default NULL, `location` varchar(100) default NULL, PRIMARY KEY (`id`) ) </pre> <br /> <br />首先,建立工程和package,以下是我的工程目录 <br />  action <br />      DeletePeopleAction.java     //删除人员action <br />      EditPeopleAction.java         //编辑人员action第一步,读取需要修改的人员资料 <br />       EditPeopleActionDo.java   //修改人员action <br />      ListPeopleAction.javaSave   //显示人员列表action <br />      SavePeopleAction.java         //新增人员action <br />      SearchPeopleAction.java     //查找人员action <br />dao <br />      IDAO.java    //数据库操作接口 <br />       StudentDAOImpl.java  //数据库操作实现 <br />domain <br />      AbstractPeople.java   //实体抽象类 <br />       People.hbm.xml         //数据库映射 <br />       People.java                 //实体类 <br />service <br />      IService.java   //服务层接口 <br />       StudentManagerImpl.java   //服务层实现 <br />util <br />     Character.java   //字符编码过滤器 <br />      PageSupport.java   //分页 <br />applicationContext.xml   //Spring配置文件(hibernate部分和Service部分) <br /> <br />JSP:不详细些了。 <br />   addStudent.jsp <br />   editStudent.jsp <br />   searchList.jsp <br />   searchStudent.jsp <br />   studentList.jsp <br /> <br />我觉得问题就出在 Spring 的xml部署上, <br />或者是我引入的包有冲突,要么就是根本不对。 <br />下面是应用的配置信息: <br />1.web.xml <br /><pre name="code" class="java"><!----> &lt;web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemalocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"&gt; &lt;context-param&gt; &lt;param-name&gt;contextConfigLocation&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/classes/applicationContext.xml&lt;/param-value&gt; &lt;/context-param&gt; &lt;resource-ref&gt; &lt;description&gt;SqlServer Datasource example&lt;/description&gt; &lt;res-ref-name&gt;jdbc/StudentManager&lt;/res-ref-name&gt; &lt;res-type&gt;javax.sql.DataSource&lt;/res-type&gt; &lt;res-auth&gt;Container&lt;/res-auth&gt; &lt;/resource-ref&gt; &lt;filter&gt; &lt;filter-name&gt;hibernateFilter&lt;/filter-name&gt; &lt;filter-class&gt; org.springframework.orm.hibernate3.support.OpenSessionInViewFilter &lt;/filter-class&gt; &lt;init-param&gt; &lt;param-name&gt;singleSession&lt;/param-name&gt; &lt;param-value&gt;true&lt;/param-value&gt; &lt;/init-param&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;hibernateFilter&lt;/filter-name&gt; &lt;url-pattern&gt;*.do&lt;/url-pattern&gt; &lt;/filter-mapping&gt; &lt;servlet&gt; &lt;servlet-name&gt;SpringContextServlet&lt;/servlet-name&gt; &lt;servlet-class&gt; org.springframework.web.context.ContextLoaderServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet&gt; &lt;servlet-name&gt;SpringLog4jConfigServlet&lt;/servlet-name&gt; &lt;servlet-class&gt; org.springframework.web.util.Log4jConfigServlet &lt;/servlet-class&gt; &lt;/servlet&gt; &lt;servlet&gt; &lt;servlet-name&gt;web&lt;/servlet-name&gt; &lt;servlet-class&gt; org.springframework.web.servlet.DispatcherServlet &lt;/servlet-class&gt; &lt;/servlet&gt; &lt;servlet&gt; &lt;servlet-name&gt;action&lt;/servlet-name&gt; &lt;servlet-class&gt;org.apache.struts.action.ActionServlet&lt;/servlet-class&gt; &lt;init-param&gt; &lt;param-name&gt;config&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/struts-config.xml&lt;/param-value&gt; &lt;/init-param&gt; &lt;init-param&gt; &lt;param-name&gt;debug&lt;/param-name&gt; &lt;param-value&gt;2&lt;/param-value&gt; &lt;/init-param&gt; &lt;init-param&gt; &lt;param-name&gt;detail&lt;/param-name&gt; &lt;param-value&gt;2&lt;/param-value&gt; &lt;/init-param&gt; &lt;load-on-startup&gt;2&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;action&lt;/servlet-name&gt; &lt;url-pattern&gt;*.do&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;/WEB-INF/jsp/index.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;taglib&gt; &lt;taglib-uri&gt;/WEB-INF/struts-bean.tld&lt;/taglib-uri&gt; &lt;taglib-location&gt;/WEB-INF/struts-bean.tld&lt;/taglib-location&gt; &lt;/taglib&gt; &lt;taglib&gt; &lt;taglib-uri&gt;/WEB-INF/struts-html.tld&lt;/taglib-uri&gt; &lt;taglib-location&gt;/WEB-INF/struts-html.tld&lt;/taglib-location&gt; &lt;/taglib&gt; &lt;taglib&gt; &lt;taglib-uri&gt;/WEB-INF/struts-logic.tld&lt;/taglib-uri&gt; &lt;taglib-location&gt;/WEB-INF/struts-logic.tld&lt;/taglib-location&gt; &lt;/taglib&gt; &lt;taglib&gt; &lt;taglib-uri&gt;/WEB-INF/struts-nested.tld&lt;/taglib-uri&gt; &lt;taglib-location&gt;/WEB-INF/struts-nested.tld&lt;/taglib-location&gt; &lt;/taglib&gt; &lt;/web-app&gt; </pre> <br /> <br />2.struts-config.xml <br /><pre name="code" class="java"><!----> &lt;struts-config&gt; &lt;data-sources&gt; &lt;form-beans&gt; &lt;form-bean name="people" type="domain.People"&gt;&lt;/form-bean&gt; &lt;/form-beans&gt; &lt;global-exceptions&gt; &lt;global-forwards&gt; &lt;action-mappings&gt; &lt;action path="/savePeople" name="people" type="action.SavePeopleAction" scope="session" parameter="method"&gt; &lt;forward name="success" path="/listPeople.do"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/listPeople" name="people" type="action.ListPeopleAction"&gt; &lt;forward name="success" path="/studentList.jsp"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/deletePeople" name="people" type="action.DeletePeopleAction"&gt; &lt;forward name="success" path="/studentList.jsp"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/editPeople" name="people" type="action.EditPeopleAction"&gt; &lt;forward name="success" path="/editStudent.jsp"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/editPeopleDo" name="people" type="action.EditPeopleActionDo"&gt; &lt;forward name="success" path="/studentList.jsp"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/searchPeople" name="people" type="action.SearchPeopleAction"&gt; &lt;forward name="success" path="/searchList.jsp"&gt;&lt;/forward&gt; &lt;/action&gt; &lt;action path="/test" name="people" type="action.Test"&gt;&lt;/action&gt; &lt;/action-mappings&gt; &lt;controller locale="true"&gt; &lt;message-resources parameter=""&gt; <!----> &lt;/struts-config&gt; </pre> <br /> <br /> <br />3.applicationContext.xml <br /><pre name="code" class="java"><!----> &lt;beans&gt; <!----> &lt;bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" depends-on="sessionFactory"&gt; &lt;property name="sessionFactory"&gt; &lt;ref bean="sessionFactory"&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="studentManager" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"&gt; &lt;property name="transactionManager"&gt; &lt;ref bean="transactionManager"&gt;&lt;/ref&gt; &lt;/property&gt; &lt;property name="target"&gt; &lt;bean class="service.StudentManagerImpl"&gt; &lt;property name="studentDAO"&gt; &lt;ref bean="StudentDAO"&gt; &lt;/property&gt; &lt;/bean&gt; &lt;/property&gt; &lt;property name="transactionAttributes"&gt; &lt;props&gt; &lt;prop key="save*"&gt;PROPAGATION_REQUIRED&lt;/prop&gt; &lt;prop key="list*"&gt;PROPAGATION_REQUIRED,readOnly&lt;/prop&gt; &lt;prop key="delete*"&gt;PROPAGATION_REQUIRED&lt;/prop&gt; &lt;prop key="get*"&gt;PROPAGATION_REQUIRED,readOnly&lt;/prop&gt; &lt;prop key="edit*"&gt;PROPAGATION_REQUIRED&lt;/prop&gt; &lt;prop key="search*"&gt;PROPAGATION_REQUIRED&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;property name="proxyTargetClass"&gt; &lt;value&gt;true&lt;/value&gt; &lt;/property&gt; &lt;/bean&gt; <!----> &lt;bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt; &lt;property name="driverClassName"&gt; &lt;value&gt;com.mysql.jdbc.Driver&lt;/value&gt; &lt;/property&gt; &lt;property name="url"&gt; &lt;value&gt;jdbc:mysql://localhost:3306/dbjee&lt;/value&gt; &lt;/property&gt; &lt;property name="username"&gt; &lt;value&gt;root&lt;/value&gt; &lt;/property&gt; &lt;property name="password"&gt; &lt;value&gt;123456&lt;/value&gt; &lt;/property&gt; &lt;/bean&gt; <!----> &lt;bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"&gt; &lt;property name="dataSource"&gt; &lt;ref local="dataSource"&gt; &lt;/property&gt; &lt;property name="hibernateProperties"&gt; &lt;props&gt; &lt;prop key="hibernate.dialect"&gt;org.hibernate.dialect.MySQLDialect&lt;/prop&gt; &lt;prop key="hibernate.show_sql"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.cache.use_query_cache"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.cache.provider_class"&gt; org.hibernate.cache.HashtableCacheProvider&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; <!----> &lt;property name="mappingResources"&gt; &lt;list&gt; &lt;value&gt;domain/People.hbm.xml&lt;/value&gt; &lt;/list&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="StudentDAO" class="dao.StudentDAOImpl"&gt; &lt;property name="sessionFactory"&gt; &lt;ref local="sessionFactory"&gt; &lt;/property&gt; &lt;/bean&gt; &lt;/beans&gt; </pre> <br /> <br />4.People.hbm.xml <br /><pre name="code" class="java"><!----> <!----> &lt;hibernate-mapping package="domain"&gt; &lt;class name="People" table="people"&gt; &lt;id name="id" type="java.lang.Integer"&gt; &lt;column name="id"&gt; &lt;generator class="increment"&gt;&lt;/generator&gt; &lt;/id&gt; &lt;property name="name" type="java.lang.String"&gt; &lt;column name="name" length="100"&gt; &lt;/property&gt; &lt;property name="location" type="java.lang.String"&gt; &lt;column name="location" length="100"&gt; &lt;/property&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </pre> <br /> <br /> <br /><span style="font-size: large;">附件里是我引入的jar包。 <br />希望各位能帮帮忙,困扰我2天,一直出不来。</span> <br /> <br />最后把启动Tomcat时报的错误也贴出来。 <br /><pre name="code" class="java">严重: Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/TransactionManager java.lang.NoClassDefFoundError: javax/transaction/TransactionManager at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Unknown Source) at java.lang.Class.getDeclaredMethods(Unknown Source) at java.beans.Introspector$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.beans.Introspector.getPublicDeclaredMethods(Unknown Source) at java.beans.Introspector.getTargetMethodInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at org.springframework.beans.CachedIntrospectionResults.&lt;init&gt;(CachedIntrospectionResults.java:149) at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:85) at org.springframework.beans.BeanWrapperImpl.setIntrospectionClass(BeanWrapperImpl.java:234) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:192) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:176) at org.springframework.beans.BeanWrapperImpl.&lt;init&gt;(BeanWrapperImpl.java:129) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:491) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:366) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:330) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:283) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:321) at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:139) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:252) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:190) at org.springframework.web.context.ContextLoaderServlet.init(ContextLoaderServlet.java:83) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:448) at org.apache.catalina.core.StandardServer.start(StandardServer.java:700) at org.apache.catalina.startup.Catalina.start(Catalina.java:552) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) Caused by: java.lang.ClassNotFoundException: javax.transaction.TransactionManager at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232) at java.lang.ClassLoader.loadClassInternal(Unknown Source) ... 55 more 2008-11-14 20:08:31 org.apache.catalina.core.ApplicationContext log 严重: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/TransactionManager java.lang.NoClassDefFoundError: javax/transaction/TransactionManager at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Unknown Source) at java.lang.Class.getDeclaredMethods(Unknown Source) at java.beans.Introspector$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.beans.Introspector.getPublicDeclaredMethods(Unknown Source) at java.beans.Introspector.getTargetMethodInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at org.springframework.beans.CachedIntrospectionResults.&lt;init&gt;(CachedIntrospectionResults.java:149) at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:85) at org.springframework.beans.BeanWrapperImpl.setIntrospectionClass(BeanWrapperImpl.java:234) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:192) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:176) at org.springframework.beans.BeanWrapperImpl.&lt;init&gt;(BeanWrapperImpl.java:129) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:491) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:366) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:330) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:283) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:321) at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:139) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:252) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:190) at org.springframework.web.context.ContextLoaderServlet.init(ContextLoaderServlet.java:83) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:448) at org.apache.catalina.core.StandardServer.start(StandardServer.java:700) at org.apache.catalina.startup.Catalina.start(Catalina.java:552) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) Caused by: java.lang.ClassNotFoundException: javax.transaction.TransactionManager at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232) at java.lang.ClassLoader.loadClassInternal(Unknown Source) ... 55 more 2008-11-14 20:08:31 org.apache.catalina.core.StandardContext loadOnStartup 严重: Servlet /SSHDemo threw load() exception java.lang.ClassNotFoundException: javax.transaction.TransactionManager at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Unknown Source) at java.lang.Class.getDeclaredMethods(Unknown Source) at java.beans.Introspector$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.beans.Introspector.getPublicDeclaredMethods(Unknown Source) at java.beans.Introspector.getTargetMethodInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at java.beans.Introspector.getBeanInfo(Unknown Source) at org.springframework.beans.CachedIntrospectionResults.&lt;init&gt;(CachedIntrospectionResults.java:149) at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:85) at org.springframework.beans.BeanWrapperImpl.setIntrospectionClass(BeanWrapperImpl.java:234) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:192) at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:176) at org.springframework.beans.BeanWrapperImpl.&lt;init&gt;(BeanWrapperImpl.java:129) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:491) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:366) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:330) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:283) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:321) at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:139) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:252) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:190) at org.springframework.web.context.ContextLoaderServlet.init(ContextLoaderServlet.java:83) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:448) at org.apache.catalina.core.StandardServer.start(StandardServer.java:700) at org.apache.catalina.startup.Catalina.start(Catalina.java:552) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) 2008-11-14 20:08:32 org.apache.coyote.http11.Http11BaseProtocol start 信息: Starting Coyote HTTP/1.1 on http-8888 2008-11-14 20:08:32 org.apache.jk.common.ChannelSocket init </pre><br /><strong>问题补充</strong><br /><div class="quote_title">zzxplayful 写道</div><div class="quote_div">没有这个包 <br />java.lang.ClassNotFoundException: javax.transaction.TransactionManager  </div> <br />这段异常我看得懂, <br />包括下面的: <br /><pre name="code" class="java">org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/TransactionManager</pre> <br /> <br />都看得懂,我想知道的是解决办法。 <br />比如 <br />javax.transaction.TransactionManager <br />在什么包里? <br />要怎样解决?<br /><strong>问题补充</strong><br /><div class="quote_title">fywcc 写道</div><div class="quote_div">这个是spring里面的  你把SPRING的jar包重新覆盖进去试试</div> <br /> <br />我在Spring包里看了啊, <br />源码都是以 org.springframework.×××× 开始的啊, <br />没有 javax.transcation.** 啊, <br />怎么办?还是需要什么别的包,要么是我的包冲突了。 <br /> <br />我引入了: <br />antlr <br />commons-beanutils.jar <br />commons-digester.jar <br />commons-fileupload.jar <br />commons-logging.jar <br />commons-validator.jar <br />jakarta-oro.jar <br />struts.jar <br /> <br />spring.jar <br /> <br />hibernate3.jar<br /><strong>问题补充</strong><br /><div class="quote_title">jones 写道</div><div class="quote_div">放入jta.jar就行了,找找吧,spring里面应该有,要不就是Hibernate里面有</div> <br />谢谢你。 <br />我把缺少的包都放上了,终于启动Tomcat时候不抛异常,而且也能打开welcome页面了。 <br /> <br />但还有其他问题,明天搞。 <br /> <br />第一次搞SSH,多谢指点啊!
爬虫福利二 之 妹子图网MM批量下载
爬虫福利一:27报网MM批量下载    点击 看了本文,相信大家对爬虫一定会产生强烈的兴趣,激励自己去学习爬虫,在这里提前祝:大家学有所成! 目标网站:妹子图网 环境:Python3.x 相关第三方模块:requests、beautifulsoup4 Re:各位在测试时只需要将代码里的变量 path 指定为你当前系统要保存的路径,使用 python xxx.py 或IDE运行即可。
Java学习的正确打开方式
在博主认为,对于入门级学习java的最佳学习方法莫过于视频+博客+书籍+总结,前三者博主将淋漓尽致地挥毫于这篇博客文章中,至于总结在于个人,实际上越到后面你会发现学习的最好方式就是阅读参考官方文档其次就是国内的书籍,博客次之,这又是一个层次了,这里暂时不提后面再谈。博主将为各位入门java保驾护航,各位只管冲鸭!!!上天是公平的,只要不辜负时间,时间自然不会辜负你。 何谓学习?博主所理解的学习,它
程序员必须掌握的核心算法有哪些?
由于我之前一直强调数据结构以及算法学习的重要性,所以就有一些读者经常问我,数据结构与算法应该要学习到哪个程度呢?,说实话,这个问题我不知道要怎么回答你,主要取决于你想学习到哪些程度,不过针对这个问题,我稍微总结一下我学过的算法知识点,以及我觉得值得学习的算法。这些算法与数据结构的学习大多数是零散的,并没有一本把他们全部覆盖的书籍。下面是我觉得值得学习的一些算法以及数据结构,当然,我也会整理一些看过
大学四年自学走来,这些私藏的实用工具/学习网站我贡献出来了
大学四年,看课本是不可能一直看课本的了,对于学习,特别是自学,善于搜索网上的一些资源来辅助,还是非常有必要的,下面我就把这几年私藏的各种资源,网站贡献出来给你们。主要有:电子书搜索、实用工具、在线视频学习网站、非视频学习网站、软件下载、面试/求职必备网站。 注意:文中提到的所有资源,文末我都给你整理好了,你们只管拿去,如果觉得不错,转发、分享就是最大的支持了。 一、PDF搜索网站推荐 对于大部
linux系列之常用运维命令整理笔录
本博客记录工作中需要的linux运维命令,大学时候开始接触linux,会一些基本操作,可是都没有整理起来,加上是做开发,不做运维,有些命令忘记了,所以现在整理成博客,当然vi,文件操作等就不介绍了,慢慢积累一些其它拓展的命令,博客不定时更新 顺便拉下票,我在参加csdn博客之星竞选,欢迎投票支持,每个QQ或者微信每天都可以投5票,扫二维码即可,http://m234140.nofollow.ax.
Vue + Spring Boot 项目实战(十四):用户认证方案与完善的访问拦截
本篇文章主要讲解 token、session 等用户认证方案的区别并分析常见误区,以及如何通过前后端的配合实现完善的访问拦截,为下一步权限控制的实现打下基础。
比特币原理详解
一、什么是比特币 比特币是一种电子货币,是一种基于密码学的货币,在2008年11月1日由中本聪发表比特币白皮书,文中提出了一种去中心化的电子记账系统,我们平时的电子现金是银行来记账,因为银行的背后是国家信用。去中心化电子记账系统是参与者共同记账。比特币可以防止主权危机、信用风险。其好处不多做赘述,这一层面介绍的文章很多,本文主要从更深层的技术原理角度进行介绍。 二、问题引入  假设现有4个人
程序员接私活怎样防止做完了不给钱?
首先跟大家说明一点,我们做 IT 类的外包开发,是非标品开发,所以很有可能在开发过程中会有这样那样的需求修改,而这种需求修改很容易造成扯皮,进而影响到费用支付,甚至出现做完了项目收不到钱的情况。 那么,怎么保证自己的薪酬安全呢? 我们在开工前,一定要做好一些证据方面的准备(也就是“讨薪”的理论依据),这其中最重要的就是需求文档和验收标准。一定要让需求方提供这两个文档资料作为开发的基础。之后开发
网页实现一个简单的音乐播放器(大佬别看。(⊙﹏⊙))
今天闲着无事,就想写点东西。然后听了下歌,就打算写个播放器。 于是乎用h5 audio的加上js简单的播放器完工了。 欢迎 改进 留言。 演示地点跳到演示地点 html代码如下`&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;music&lt;/title&gt; &lt;meta charset="utf-8"&gt
Python十大装B语法
Python 是一种代表简单思想的语言,其语法相对简单,很容易上手。不过,如果就此小视 Python 语法的精妙和深邃,那就大错特错了。本文精心筛选了最能展现 Python 语法之精妙的十个知识点,并附上详细的实例代码。如能在实战中融会贯通、灵活使用,必将使代码更为精炼、高效,同时也会极大提升代码B格,使之看上去更老练,读起来更优雅。 1. for - else 什么?不是 if 和 else 才
数据库优化 - SQL优化
前面一篇文章从实例的角度进行数据库优化,通过配置一些参数让数据库性能达到最优。但是一些“不好”的SQL也会导致数据库查询变慢,影响业务流程。本文从SQL角度进行数据库优化,提升SQL运行效率。 判断问题SQL 判断SQL是否有问题时可以通过两个表象进行判断: 系统级别表象 CPU消耗严重 IO等待严重 页面响应时间过长
2019年11月中国大陆编程语言排行榜
2019年11月2日,我统计了某招聘网站,获得有效程序员招聘数据9万条。针对招聘信息,提取编程语言关键字,并统计如下: 编程语言比例 rank pl_ percentage 1 java 33.62% 2 c/c++ 16.42% 3 c_sharp 12.82% 4 javascript 12.31% 5 python 7.93% 6 go 7.25% 7
通俗易懂地给女朋友讲:线程池的内部原理
餐厅的约会 餐盘在灯光的照耀下格外晶莹洁白,女朋友拿起红酒杯轻轻地抿了一小口,对我说:“经常听你说线程池,到底线程池到底是个什么原理?”我楞了一下,心里想女朋友今天是怎么了,怎么突然问出这么专业的问题,但做为一个专业人士在女朋友面前也不能露怯啊,想了一下便说:“我先给你讲讲我前同事老王的故事吧!” 大龄程序员老王 老王是一个已经北漂十多年的程序员,岁数大了,加班加不动了,升迁也无望,于是拿着手里
经典算法(5)杨辉三角
写在前面: 我是 扬帆向海,这个昵称来源于我的名字以及女朋友的名字。我热爱技术、热爱开源、热爱编程。技术是开源的、知识是共享的。 这博客是对自己学习的一点点总结及记录,如果您对 Java、算法 感兴趣,可以关注我的动态,我们一起学习。 用知识改变命运,让我们的家人过上更好的生活。 目录一、杨辉三角的介绍二、杨辉三角的算法思想三、代码实现1.第一种写法2.第二种写法 一、杨辉三角的介绍 百度
腾讯算法面试题:64匹马8个跑道需要多少轮才能选出最快的四匹?
昨天,有网友私信我,说去阿里面试,彻底的被打击到了。问了为什么网上大量使用ThreadLocal的源码都会加上private static?他被难住了,因为他从来都没有考虑过这个问题。无独有偶,今天笔者又发现有网友吐槽了一道腾讯的面试题,我们一起来看看。 腾讯算法面试题:64匹马8个跑道需要多少轮才能选出最快的四匹? 在互联网职场论坛,一名程序员发帖求助到。二面腾讯,其中一个算法题:64匹
面试官:你连RESTful都不知道我怎么敢要你?
面试官:了解RESTful吗? 我:听说过。 面试官:那什么是RESTful? 我:就是用起来很规范,挺好的 面试官:是RESTful挺好的,还是自我感觉挺好的 我:都挺好的。 面试官:… 把门关上。 我:… 要干嘛?先关上再说。 面试官:我说出去把门关上。 我:what ?,夺门而去 文章目录01 前言02 RESTful的来源03 RESTful6大原则1. C-S架构2. 无状态3.统一的接
为啥国人偏爱Mybatis,而老外喜欢Hibernate/JPA呢?
关于SQL和ORM的争论,永远都不会终止,我也一直在思考这个问题。昨天又跟群里的小伙伴进行了一番讨论,感触还是有一些,于是就有了今天这篇文。 声明:本文不会下关于Mybatis和JPA两个持久层框架哪个更好这样的结论。只是摆事实,讲道理,所以,请各位看官勿喷。 一、事件起因 关于Mybatis和JPA孰优孰劣的问题,争论已经很多年了。一直也没有结论,毕竟每个人的喜好和习惯是大不相同的。我也看
SQL-小白最佳入门sql查询一
一 说明 如果是初学者,建议去网上寻找安装Mysql的文章安装,以及使用navicat连接数据库,以后的示例基本是使用mysql数据库管理系统; 二 准备前提 需要建立一张学生表,列分别是id,名称,年龄,学生信息;本示例中文章篇幅原因SQL注释略; 建表语句: CREATE TABLE `student` ( `id` int(11) NOT NULL AUTO_INCREMENT, `
项目中的if else太多了,该怎么重构?
介绍 最近跟着公司的大佬开发了一款IM系统,类似QQ和微信哈,就是聊天软件。我们有一部分业务逻辑是这样的 if (msgType = "文本") { // dosomething } else if(msgType = "图片") { // doshomething } else if(msgType = "视频") { // doshomething } else { // dosho
“狗屁不通文章生成器”登顶GitHub热榜,分分钟写出万字形式主义大作
一、垃圾文字生成器介绍 最近在浏览GitHub的时候,发现了这样一个骨骼清奇的雷人项目,而且热度还特别高。 项目中文名:狗屁不通文章生成器 项目英文名:BullshitGenerator 根据作者的介绍,他是偶尔需要一些中文文字用于GUI开发时测试文本渲染,因此开发了这个废话生成器。但由于生成的废话实在是太过富于哲理,所以最近已经被小伙伴们给玩坏了。 他的文风可能是这样的: 你发现,
程序员:我终于知道post和get的区别
IT界知名的程序员曾说:对于那些月薪三万以下,自称IT工程师的码农们,其实我们从来没有把他们归为我们IT工程师的队伍。他们虽然总是以IT工程师自居,但只是他们一厢情愿罢了。 此话一出,不知激起了多少(码农)程序员的愤怒,却又无可奈何,于是码农问程序员。 码农:你知道get和post请求到底有什么区别? 程序员:你看这篇就知道了。 码农:你月薪三万了? 程序员:嗯。 码农:你是怎么做到的? 程序员:
《程序人生》系列-这个程序员只用了20行代码就拿了冠军
你知道的越多,你不知道的越多 点赞再看,养成习惯GitHub上已经开源https://github.com/JavaFamily,有一线大厂面试点脑图,欢迎Star和完善 前言 这一期不算《吊打面试官》系列的,所有没前言我直接开始。 絮叨 本来应该是没有这期的,看过我上期的小伙伴应该是知道的嘛,双十一比较忙嘛,要值班又要去帮忙拍摄年会的视频素材,还得搞个程序员一天的Vlog,还要写BU
加快推动区块链技术和产业创新发展,2019可信区块链峰会在京召开
      11月8日,由中国信息通信研究院、中国通信标准化协会、中国互联网协会、可信区块链推进计划联合主办,科技行者协办的2019可信区块链峰会将在北京悠唐皇冠假日酒店开幕。   区块链技术被认为是继蒸汽机、电力、互联网之后,下一代颠覆性的核心技术。如果说蒸汽机释放了人类的生产力,电力解决了人类基本的生活需求,互联网彻底改变了信息传递的方式,区块链作为构造信任的技术有重要的价值。   1
程序员把地府后台管理系统做出来了,还有3.0版本!12月7号最新消息:已在开发中有github地址
第一幕:缘起 听说阎王爷要做个生死簿后台管理系统,我们派去了一个程序员…… 996程序员做的梦: 第一场:团队招募 为了应对地府管理危机,阎王打算找“人”开发一套地府后台管理系统,于是就在地府总经办群中发了项目需求。 话说还是中国电信的信号好,地府都是满格,哈哈!!! 经常会有外行朋友问:看某网站做的不错,功能也简单,你帮忙做一下? 而这次,面对这样的需求,这个程序员
Android 9.0系统新特性,对刘海屏设备进行适配
其实Android 9.0系统已经是去年推出的“老”系统了,这个系统中新增了一个比较重要的特性,就是对刘海屏设备进行了支持。一直以来我也都有打算针对这个新特性好好地写一篇文章,但是为什么直到拖到了Android 10.0系统都发布了才开始写这篇文章呢?当然,一是因为我这段时间确实比较忙,今年几乎绝大部分的业余时间都放到写新书上了。但是最主要的原因并不是这个,而是因为刘海屏设备的适配存在一定的特殊性
网易云6亿用户音乐推荐算法
网易云音乐是音乐爱好者的集聚地,云音乐推荐系统致力于通过 AI 算法的落地,实现用户千人千面的个性化推荐,为用户带来不一样的听歌体验。 本次分享重点介绍 AI 算法在音乐推荐中的应用实践,以及在算法落地过程中遇到的挑战和解决方案。 将从如下两个部分展开: AI 算法在音乐推荐中的应用 音乐场景下的 AI 思考 从 2013 年 4 月正式上线至今,网易云音乐平台持续提供着:乐屏社区、UGC
【技巧总结】位运算装逼指南
位算法的效率有多快我就不说,不信你可以去用 10 亿个数据模拟一下,今天给大家讲一讲位运算的一些经典例子。不过,最重要的不是看懂了这些例子就好,而是要在以后多去运用位运算这些技巧,当然,采用位运算,也是可以装逼的,不信,你往下看。我会从最简单的讲起,一道比一道难度递增,不过居然是讲技巧,那么也不会太难,相信你分分钟看懂。 判断奇偶数 判断一个数是基于还是偶数,相信很多人都做过,一般的做法的代码如下
日均350000亿接入量,腾讯TubeMQ性能超过Kafka
整理 | 夕颜出品 | AI科技大本营(ID:rgznai100) 【导读】近日,腾讯开源动作不断,相继开源了分布式消息中间件TubeMQ,基于最主流的 OpenJDK8开发的
8年经验面试官详解 Java 面试秘诀
    作者 | 胡书敏 责编 | 刘静 出品 | CSDN(ID:CSDNnews) 本人目前在一家知名外企担任架构师,而且最近八年来,在多家外企和互联网公司担任Java技术面试官,前后累计面试了有两三百位候选人。在本文里,就将结合本人的面试经验,针对Java初学者、Java初级开发和Java开发,给出若干准备简历和准备面试的建议。   Java程序员准备和投递简历的实
面试官如何考察你的思维方式?
1.两种思维方式在求职面试中,经常会考察这种问题:北京有多少量特斯拉汽车? 某胡同口的煎饼摊一年能卖出多少个煎饼? 深圳有多少个产品经理? 一辆公交车里能装下多少个乒乓球? 一
碎片化的时代,如何学习
今天周末,和大家聊聊学习这件事情。 在如今这个社会,我们的时间被各类 APP 撕的粉碎。 刷知乎、刷微博、刷朋友圈; 看论坛、看博客、看公号; 等等形形色色的信息和知识获取方式一个都不错过。 貌似学了很多,但是却感觉没什么用。 要解决上面这些问题,首先要分清楚一点,什么是信息,什么是知识。 那什么是信息呢? 你一切听到的、看到的,都是信息,比如微博上的明星出轨、微信中的表情大战、抖音上的...
so easy! 10行代码写个"狗屁不通"文章生成器
前几天,GitHub 有个开源项目特别火,只要输入标题就可以生成一篇长长的文章。背后实现代码一定很复杂吧,里面一定有很多高深莫测的机器学习等复杂算法不过,当我看了源代码之后这程序不到50
知乎高赞:中国有什么拿得出手的开源软件产品?(整理自本人原创回答)
知乎高赞:中国有什么拿得出手的开源软件产品? 在知乎上,有个问题问“中国有什么拿得出手的开源软件产品(在 GitHub 等社区受欢迎度较好的)?” 事实上,还不少呢~ 本人于2019.7.6进行了较为全面的 回答 - Bravo Yeung,获得该问题下回答中得最高赞(236赞和1枚专业勋章),对这些受欢迎的 Github 开源项目分类整理如下: 分布式计算、云平台相关工具类 1.SkyWalk
MySQL数据库总结
文章目录一、数据库简介二、MySQL数据类型(5.5版本)三、Sql语句(1)Sql语句简介(2)数据定义语言DDLcreate,alter,drop(3)数据操纵语言DMLupdate,insert,delete(4)数据控制语言DCLgrant,revoke(5)数据查询语言DQLselect(6)分组查询与分页查询group by,limit四、完整性约束(单表)五、多表查询六、MySQL数
记一次腾讯面试:进程之间究竟有哪些通信方式?如何通信? ---- 告别死记硬背
有一次面试的时候,被问到进程之间有哪些通信方式,不过由于之前没深入思考且整理过,说的并不好。想必大家也都知道进程有哪些通信方式,可是我猜很多人都是靠着”背“来记忆的,所以今天的这篇文章,讲给大家详细着讲解他们是如何通信的,让大家尽量能够理解他们之间的区别、优缺点等,这样的话,以后面试官让你举例子,你也能够顺手拈来。 1、管道 我们来看一条 Linux 的语句 netstat -tulnp | gr...
20行Python代码爬取王者荣耀全英雄皮肤
引言 王者荣耀大家都玩过吧,没玩过的也应该听说过,作为时下最火的手机MOBA游戏,咳咳,好像跑题了。我们今天的重点是爬取王者荣耀所有英雄的所有皮肤,而且仅仅使用20行Python代码即可完成。 准备工作 爬取皮肤本身并不难,难点在于分析,我们首先得得到皮肤图片的url地址,话不多说,我们马上来到王者荣耀的官网: 我们点击英雄资料,然后随意地选择一位英雄,接着F12打开调试台,找到英雄原皮肤的图片
程序设计的5个底层逻辑,决定你能走多快
阿里妹导读:肉眼看计算机是由CPU、内存、显示器这些硬件设备组成,但大部分人从事的是软件开发工作。计算机底层原理就是连通硬件和软件的桥梁,理解计算机底层原理才能在程序设计这条路上越走越快,越走越轻松。从操作系统层面去理解高级编程语言的执行过程,会发现好多软件设计都是同一种套路,很多语言特性都依赖于底层机制,今天董鹏为你一一揭秘。 结合 CPU 理解一行 Java 代码是怎么执行的 根据冯·诺...
张小龙-年薪近3亿的微信之父,他是如何做到的?
张小龙生于湖南邵东魏家桥镇, 家庭主要特点:穷。 不仅自己穷,亲戚也都很穷,可以说穷以类聚。爷爷做过铜匠,总的来说,标准的劳动阶级出身。 家有兄弟两人, 一个小龙,一个小虎。 小虎好动,与邻里打成一片, 小龙好静,喜好读书。 “文静的像个妹子。”张小龙的表哥如是说。 穷文富武,做个读书郎是个不错的选择。 87年至94年, 华中科技大学本硕连读。 本科就读电信系, 不喜欢上课
阿里靠什么武功秘籍渡过“双十一“的天量冲击
双十一大概会产生多大的数据量呢,可能大家没概念,举个例子央视拍了这么多年电视新闻节目,几十年下来他存了大概80P的数据。而今年双11一天,阿里要处理970P的数据,做为一个IT人,笔者认为今年”双十一“阿里最大的技术看点有有以下两个: 阿里的数据库,也就是刚刚拿下TPC冠军的OcceanBase,处理峰值也达到了骇人听闻的6100万次/秒, 阿里核心系统百分百上云了。 如果把信息系统比做一个武
西游记团队中如果需要裁掉一个人,会先裁掉谁?
2019年互联网寒冬,大批企业开始裁员,下图是网上流传的一张截图: 裁员不可避免,那如何才能做到不管大环境如何变化,自身不受影响呢? 我们先来看一个有意思的故事,如果西游记取经团队需要裁员一名,会裁掉谁呢,为什么? 西游记团队组成: 1.唐僧 作为团队teamleader,有很坚韧的品性和极高的原则性,不达目的不罢休,遇到任何问题,都没有退缩过,又很得上司支持和赏识(直接得到唐太宗的任命,既给
相关热词 c# 二进制截断字符串 c#实现窗体设计器 c#检测是否为微信 c# plc s1200 c#里氏转换原则 c# 主界面 c# do loop c#存为组套 模板 c# 停掉协程 c# rgb 读取图片
立即提问