java.lang.ClassNotFoundException: com.android.id.impl.IdProviderImpl

巨量引擎SDK接入报错java.lang.ClassNotFoundException: com.android.id.impl.IdProviderImpl
求救,非常感谢!

05/15 16:49:59: Launching 'app' on Pixel 2 API 28.
$ adb shell am start -n "com.cn.leaf.demo/com.cn.leaf.demo.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 6411 on device 'Pixel_2_API_28 [emulator-5554]'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
I/MultiDex: VM with version 2.1.0 has multidex support
    Installing application
    VM has multidex support, MultiDex support library is disabled.
W/om.cn.leaf.dem: Accessing hidden method Landroid/graphics/drawable/Drawable;->getOpticalInsets()Landroid/graphics/Insets; (light greylist, linking)
    Accessing hidden field Landroid/graphics/Insets;->left:I (light greylist, linking)
    Accessing hidden field Landroid/graphics/Insets;->right:I (light greylist, linking)
    Accessing hidden field Landroid/graphics/Insets;->top:I (light greylist, linking)
    Accessing hidden field Landroid/graphics/Insets;->bottom:I (light greylist, linking)
W/om.cn.leaf.dem: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (light greylist, reflection)
W/om.cn.leaf.dem: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (light greylist, reflection)
W/om.cn.leaf.dem: Accessing hidden method Landroid/widget/TextView;->getTextDirectionHeuristic()Landroid/text/TextDirectionHeuristic; (light greylist, linking)
D/TrackerDr: f#init: 
D/TrackerDr: i#init: 
E/i#IdentifierManager: reflect exception!
    java.lang.ClassNotFoundException: com.android.id.impl.IdProviderImpl
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:453)
        at java.lang.Class.forName(Class.java:378)
        at com.bytedance.a.i$a.<clinit>(SourceFile:195)
        at com.bytedance.a.i$a.a(SourceFile:185)
        at com.bytedance.a.i.a(SourceFile:106)
        at com.bytedance.a.i.<init>(SourceFile:49)
        at com.bytedance.a.i.b(SourceFile:41)
        at com.bytedance.a.i.a(SourceFile:34)
        at com.bytedance.a.g.a(SourceFile:46)
        at com.bytedance.a.b.a(SourceFile:33)
        at com.bytedance.applog.b.i.<init>(SourceFile:67)
        at com.bytedance.applog.AppLog.init(SourceFile:106)
        at com.cn.leaf.demo.MainActivity.initConfig(MainActivity.java:133)
        at com.cn.leaf.demo.MainActivity.PerMissions(MainActivity.java:186)
        at com.cn.leaf.demo.MainActivity.judgeBrand(MainActivity.java:265)
        at com.cn.leaf.demo.MainActivity.onCreate(MainActivity.java:56)
        at android.app.Activity.performCreate(Activity.java:7136)
        at android.app.Activity.performCreate(Activity.java:7127)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "com.android.id.impl.IdProviderImpl" on path: DexPathList[[zip file "/data/app/com.cn.leaf.demo-XfKMKxO94jFGo_lzV_gX6A==/base.apk"],nativeLibraryDirectories=[/data/app/com.cn.leaf.demo-XfKMKxO94jFGo_lzV_gX6A==/lib/x86, /data/app/com.cn.leaf.demo-XfKMKxO94jFGo_lzV_gX6A==/base.apk!/lib/x86, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at java.lang.Class.classForName(Native Method) 
        at java.lang.Class.forName(Class.java:453) 
        at java.lang.Class.forName(Class.java:378) 
        at com.bytedance.a.i$a.<clinit>(SourceFile:195) 
        at com.bytedance.a.i$a.a(SourceFile:185) 
        at com.bytedance.a.i.a(SourceFile:106) 
        at com.bytedance.a.i.<init>(SourceFile:49) 
        at com.bytedance.a.i.b(SourceFile:41) 
        at com.bytedance.a.i.a(SourceFile:34) 
        at com.bytedance.a.g.a(SourceFile:46) 
        at com.bytedance.a.b.a(SourceFile:33) 
        at com.bytedance.applog.b.i.<init>(SourceFile:67) 
        at com.bytedance.applog.AppLog.init(SourceFile:106) 
        at com.cn.leaf.demo.MainActivity.initConfig(MainActivity.java:133) 
        at com.cn.leaf.demo.MainActivity.PerMissions(MainActivity.java:186) 
        at com.cn.leaf.demo.MainActivity.judgeBrand(MainActivity.java:265) 
        at com.cn.leaf.demo.MainActivity.onCreate(MainActivity.java:56) 
        at android.app.Activity.performCreate(Activity.java:7136) 
        at android.app.Activity.performCreate(Activity.java:7127) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6669) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
xjh_shin
Cry_Kill 有解决办法了嘛,我也遇到了这个情况
大约一个月之前 回复

1个回答

有解决办法了嘛,我也遇到了这个情况

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
java.lang.ClassNotFoundException:

信息: No Spring WebApplicationInitializer types detected on classpath 七月 29, 2016 10:31:15 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Error configuring application listener of class com.jeeplus.modules.sys.listener.WebContextListener java.lang.ClassNotFoundException: com.jeeplus.modules.sys.listener.WebContextListener 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:530) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:512) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:139) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4907) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5490) 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(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 七月 29, 2016 10:31:15 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Skipped installing application listeners due to previous error(s) 七月 29, 2016 10:31:15 上午 org.apache.catalina.core.StandardContext startInternal 严重: Error listenerStart

java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver已在lib下添加jar包还是报错怎么办

在网上好了很多的问题 都没有解决,针对web,大家用的都是的在tomcat下的lib里添加mysql-connector的jar包 但是还是没有解决 还是连接不上,也在url里面添加后缀了 package jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class JDBCDemo { private static final String URL="jdbc:mysql://localhost:3306/db4?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Hongkong"; private static final String USERNAME="root"; private static final String PWD="root"; public static void update() {//增删改 Connection connection=null; Statement stmt =null; try { //导入驱动,加载具体驱动类 Class.forName("com.mysql.cj.jdbc.Driver");//加载具体的驱动类 //与数据库建立连接 connection=DriverManager.getConnection(URL,USERNAME,PWD); //增删改 stmt = connection.createStatement(); String sql="insert into student values(4,'kxk','123')"; int result = stmt.executeUpdate(sql); //处理结果:显示受影响行数 System.out.println(result); }catch (ClassNotFoundException e) { e.printStackTrace(); }catch (Exception e) { e.printStackTrace(); }finally { if(stmt!=null) { try { stmt.close(); }catch (SQLException e) { e.printStackTrace(); } } if(connection!=null) { try { connection.close(); }catch (SQLException e) { e.printStackTrace(); } } } } public static void main(String[] args) { update(); } } 报错还是 java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) 不知道哪里出现了问题,求助

java.lang.ClassNotFoundException: org.mortbay.jetty.Connector 这是什么错误啊?

mac Myeclipse ci 2018 weblogic12c java项目jdk1.6 weblogicjdk1.8 项目在部署到weblogic上失败 ``` ``` Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0 <2018-12-19 下午08时41分01秒 CST> <Info> <Security> <BEA-090905> <Disabling the CryptoJ JCE Provider self-integrity check for better startup performance. To enable this check, specify -Dweblogic.security.allowCryptoJDefaultJCEVerification=true.> <2018-12-19 下午08时41分01秒 CST> <Info> <Security> <BEA-090906> <Changing the default Random Number Generator in RSA CryptoJ from ECDRBG128 to HMACDRBG. To disable this change, specify -Dweblogic.security.allowCryptoJDefaultPRNG=true.> <2018-12-19 下午08时41分01秒 CST> <Info> <WebLogicServer> <BEA-000377> <Starting WebLogic Server with Java HotSpot(TM) 64-Bit Server VM Version 25.191-b12 from Oracle Corporation.> <2018-12-19 下午08时41分01秒 CST> <Info> <RCM> <BEA-2165021> <"ResourceManagement" is not enabled in this JVM. Enable "ResourceManagement" to use the WebLogic Server "Resource Consumption Management" feature. To enable "ResourceManagement", you must specify the following JVM options in the WebLogic Server instance in which the JVM runs: -XX:+UnlockCommercialFeatures -XX:+ResourceManagement.> <2018-12-19 下午08时41分01秒 CST> <Info> <Management> <BEA-141107> <Version: WebLogic Server 12.2.1.1.0 Thu Jun 2 16:21:58 PDT 2016 1784838> <2018-12-19 下午08时41分02秒 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STARTING.> <2018-12-19 下午08时41分02秒 CST> <Info> <WorkManager> <BEA-002900> <Initializing self-tuning thread pool.> <2018-12-19 下午08时41分03秒 CST> <Info> <WorkManager> <BEA-002942> <CMM memory level becomes 0. Setting standby thread pool size to 256.> <2018-12-19, 8:41:03,470 下午 CST> <Notice> <Log Management> <BEA-170019> <The server log file weblogic.logging.FileStreamHandler instance=2092500132 Current log file=/Users/oracle/Middleware/user_projects/domains/base_domain/servers/AdminServer/logs/AdminServer.log Rotation dir=/Users/oracle/Middleware/user_projects/domains/base_domain/servers/AdminServer/logs is opened. All server side log events will be written to this file.> <2018-12-19, 8:41:03,532 下午 CST> <Notice> <Security> <BEA-090946> <Security pre-initializing using security realm: myrealm> <2018-12-19, 8:41:04,84 下午 CST> <Notice> <Security> <BEA-090947> <Security post-initializing using security realm: myrealm> <2018-12-19, 8:41:04,979 下午 CST> <Notice> <Security> <BEA-090082> <Security initialized using administrative security realm: myrealm> <2018-12-19, 8:41:05,300 下午 CST> <Warning> <Store> <BEA-280109> <The JVM was unable to load the native wlfileio library for the store "_WLS_AdminServer". File and paging stores will continue to function correctly. Specifically, file stores that are configured with a transactionally safe synchronous write policy will continue to operate safely and transactionally but may open with a different write-policy. Other store types may not be able to open.> <2018-12-19, 8:41:05,340 下午 CST> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://169.254.153.13:7001/jndi/weblogic.management.mbeanservers.runtime.> <2018-12-19, 8:41:05,340 下午 CST> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://169.254.153.13:7001/jndi/weblogic.management.mbeanservers.domainruntime.> <2018-12-19, 8:41:05,352 下午 CST> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://169.254.153.13:7001/jndi/weblogic.management.mbeanservers.edit.> <2018-12-19, 8:41:06,588 下午 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STANDBY.> <2018-12-19, 8:41:06,589 下午 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STARTING.> <2018-12-19, 8:41:06,625 下午 CST> <Notice> <Log Management> <BEA-170036> <The Logging monitoring service timer has started to check for logged message counts every 30 seconds.> <2018-12-19, 8:41:06,813 下午 CST> <Notice> <Log Management> <BEA-170027> <The server has successfully established a connection with the Domain level Diagnostic Service.> <2018-12-19, 8:41:06,904 下午 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to ADMIN.> <2018-12-19, 8:41:06,956 下午 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RESUMING.> <2018-12-19, 8:41:07,5 下午 CST> <Warning> <Server> <BEA-002611> <The hostname "localhost", maps to multiple IP addresses: 127.0.0.1, 0:0:0:0:0:0:0:1.> <2018-12-19, 8:41:07,7 下午 CST> <Warning> <Server> <BEA-002611> <The hostname "zkr-jyp-pc.local", maps to multiple IP addresses: 169.254.153.13, 11.205.52.52, fe80:0:0:0:10fd:f6fc:8230:8788%10, fe80:0:0:0:97:aebc:b52a:e094%20.> <2018-12-19, 8:41:07,7 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[3]" is now listening on 127.0.0.1:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[1]" is now listening on 11.205.52.52:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default" is now listening on 169.254.153.13:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[2]" is now listening on 0:0:0:0:0:0:0:1%lo0:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <WebLogicServer> <BEA-000331> <Started the WebLogic Server Administration Server "AdminServer" for domain "base_domain" running in development mode.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[3]" is now listening on 127.0.0.1:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,8 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[1]" is now listening on 11.205.52.52:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,9 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default" is now listening on 169.254.153.13:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,9 下午 CST> <Notice> <Server> <BEA-002613> <Channel "Default[2]" is now listening on 0:0:0:0:0:0:0:1%lo0:7001 for protocols iiop, t3, ldap, snmp, http.> <2018-12-19, 8:41:07,11 下午 CST> <Notice> <WebLogicServer> <BEA-000360> <The server started in RUNNING mode.> <2018-12-19, 8:41:07,18 下午 CST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RUNNING.> <2018-12-19, 8:41:50,423 下午 CST> <Warning> <JMX> <BEA-149535> <JMX Resiliency Activity Server=AdminServer : Initializing callbacks> <2018-12-19, 8:41:50,426 下午 CST> <Warning> <JMX> <BEA-149535> <JMX Resiliency Activity Server=AdminServer : Callback is done> <2018-12-19, 8:41:50,426 下午 CST> <Warning> <JMX> <BEA-149535> <JMX Resiliency Activity Server=AdminServer : Connection already exists for the server. Does not attempt to connect to the server> <2018-12-19, 8:42:35,137 下午 CST> <Warning> <JAXRSIntegration> <BEA-2192511> <The list of resource packages: org.apache.cxf.jaxrs.provider;org.apache.cxf.jaxrs.impl;com.picc.platform.demo.webservice.server.jaxrs> <2018-12-19, 8:42:57,500 下午 CST> <Warning> <JAXRSIntegration> <BEA-2192511> <The list of resource packages: org.apache.cxf.jaxrs.provider;com.picc.platform.demo.webservice.server.jaxrs;org.apache.cxf.jaxrs.impl> <2018-12-19, 8:43:08,828 下午 CST> <Warning> <JAXRSIntegration> <BEA-2192511> <The list of resource packages: org.apache.cxf.jaxrs.provider;com.picc.platform.demo.webservice.server.jaxrs;org.apache.cxf.jaxrs.impl> <2018-12-19, 8:43:17,888 下午 CST> <Error> <Deployer> <BEA-149265> <Failure occurred in the execution of deployment request with ID "5747660773208" for task "0" on [partition-name: DOMAIN]. Error is: "weblogic.management.DeploymentException: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector" weblogic.management.DeploymentException: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.application.internal.BaseDeployment.throwAppException(BaseDeployment.java:132) at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:246) at weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:52) at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:158) at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:65) Truncated. see log file for complete stacktrace Caused By: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:1025) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:986) at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:83) at weblogic.utils.classloaders.GenericClassLoader.doFindClass(GenericClassLoader.java:607) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:539) Truncated. see log file for complete stacktrace > <2018-12-19, 8:43:17,910 下午 CST> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating deploy task for application "cams".> <2018-12-19, 8:43:17,910 下午 CST> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004 weblogic.management.DeploymentException: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.application.internal.BaseDeployment.throwAppException(BaseDeployment.java:132) at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:246) at weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:52) at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:158) at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:65) Truncated. see log file for complete stacktrace Caused By: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:1025) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:986) at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:83) at weblogic.utils.classloaders.GenericClassLoader.doFindClass(GenericClassLoader.java:607) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:539) Truncated. see log file for complete stacktrace > <2018-12-19, 8:43:17,940 下午 CST> <Error> <Console> <BEA-240003> <Administration Console encountered the following error: weblogic.management.DeploymentException: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.application.internal.BaseDeployment.throwAppException(BaseDeployment.java:132) at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:246) at weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:52) at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:158) at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:65) at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:229) at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:103) at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:241) at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:794) at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1340) at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:267) at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:177) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:186) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:14) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:47) at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:666) at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348) at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333) at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54) at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41) at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406) at weblogic.work.ExecuteThread.run(ExecuteThread.java:346) Caused by: java.lang.ClassNotFoundException: org.mortbay.jetty.Connector at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:1025) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:986) at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:83) at weblogic.utils.classloaders.GenericClassLoader.doFindClass(GenericClassLoader.java:607) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:539) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:492) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:469) at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:53) at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getDeclaredFields(Class.java:1916) at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.getFields(BaseJ2eeAnnotationProcessor.java:1047) at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.getFields(BaseJ2eeAnnotationProcessor.java:1041) at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.processJ2eeAnnotations(BaseJ2eeAnnotationProcessor.java:145) at weblogic.j2ee.dd.xml.J2eeAnnotationProcessor.processJ2eeAnnotations(J2eeAnnotationProcessor.java:47) at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.processJ2eeAnnotations(BaseJ2eeAnnotationProcessor.java:120) at weblogic.j2ee.dd.xml.PojoAnnotationProcessorImpl.processJ2eeAnnotations(PojoAnnotationProcessorImpl.java:93) at weblogic.application.internal.flow.PojoAnnotationProcessingFlow.processAnnotations(PojoAnnotationProcessingFlow.java:304) at weblogic.application.internal.flow.PojoAnnotationProcessingFlow.processPOJOsInModuleScopes(PojoAnnotationProcessingFlow.java:229) at weblogic.application.internal.flow.PojoAnnotationProcessingFlow.prepare(PojoAnnotationProcessingFlow.java:73) at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:731) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:45) at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:243) > <2018-12-19, 8:43:18,388 下午 CST> <Warning> <JAXRSIntegration> <BEA-2192511> <The list of resource packages: org.apache.cxf.jaxrs.provider;com.picc.platform.demo.webservice.server.jaxrs;org.apache.cxf.jaxrs.impl>

java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver

连接SQL2005 是出现:java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver的问题 已经看过网上发的很多帖子,也试过很多方法都没有解决。 一样的代码在java项目中没问题,放到一个插件项目中出现上面的问题(驱动包以加到插件项目中) PS:我是想把数据库中的表名和字段名取出来

Caused by: java.lang.ClassNotFoundException: Didn't find class "java.beans.PropertyDescriptor"错误

List<DivAppRecruitInfo> list2=(List<DivAppRecruitInfo>) JSONArray.toList(JSONArray.fromObject(result), DivAppRecruitInfo.class); 我已经从服务端获取到json格式的字符串数据了,想要把json字符串转化成对象,需要使用JSONObject和JSONArray,网上说要下 commons-beanutils.jar commons-lang.jar commons-collections.jar commons-logging.jar json-lib-2.2.3-jdk15.jar ezmorph-1.0.6.jar。 我都下了,但是运行就报错Caused by: java.lang.NoClassDefFoundError: Failed resolution of: [Ljava/beans/PropertyDescriptor 这是什么意思啊; 请各位有经验的Android开发者帮忙看下,感激不尽,

Caused by: java.lang.ClassNotFoundException

Android AS项目:同一个工程华为手机运行没问题,再小米手机运行包如上错误,用了很多baiduGoogle的方法都没解决,求助下各位,谢谢 ![图片说明](https://img-ask.csdn.net/upload/201703/31/1490954730_867167.jpg) ![图片说明](https://img-ask.csdn.net/upload/201703/31/1490954743_225834.jpg) ![图片说明](https://img-ask.csdn.net/upload/201703/31/1490954759_966511.jpg) Caused by: java.lang.ClassNotFoundException: Didn't find class "uk.co.senab.photoview.PhotoView" on path: DexPathList[[zip file "/data/app/com.longney.dslrpan-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.longney.dslrpan-1, /vendor/lib, /system/lib]]

java.lang.ClassNotFoundException问题

java.lang.ClassNotFoundException: com.xx.listener.InitialListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3770) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4334) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920) at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:719) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:566) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) web.xml中 <listener> <display-name>InitialListener</display-name> <listener-class> com.xx.listener.InitialListener </listener-class> </listener> 类: public class InitialListener implements ServletContextListener { private static final long serialVersionUID = 1L; private static final Log log = LogFactory.getLog(InitialListener.class); //系统基本设置业务对象 private static final ISystemConfigService systemConfigService = (ISystemConfigService)SpringUtil.getObjectFromSpring("systemConfigService"); public void contextDestroyed(ServletContextEvent sce) { log.info("销毁系统监听器初始化参数"); } public void contextInitialized(ServletContextEvent event) { log.info("初始化系统参数开始..."); ServletContext application = event.getServletContext(); //网站页面 String domainName = application.getInitParameter("domainName"); //页面没有检索到相关数据时,显示的提示信息 String noDataMessage = application.getInitParameter("noDataMessage"); application.setAttribute("noDataMessage", noDataMessage); application.setAttribute("baseUrl", domainName); application.setAttribute("siteUrl", "www." + domainName); //application.setAttribute("groupUrl", "www." + domainName); application.setAttribute("groupUrl", "http://211.149.196.53:30000"); //全局上下文路径 application.setAttribute("contextPath", application.getContextPath()); application.setAttribute("fileBasePath", event.getServletContext().getRealPath("/")); application.setAttribute("fileDirectory", "temp"); application.setAttribute("separator", File.separator); //获取网站设置的基本对象 SystemConfig systemConfig = null; try { systemConfig = systemConfigService.querySystemConfig(); if(systemConfig != null) { application.setAttribute(ContextConstants.SCOPE_SYSTEM_SETTING, systemConfig); } } catch(Exception e){ log.info("初始化系统基本设置对象的时候出错: " + e.fillInStackTrace()); } application.setAttribute("UPLOAD_SEPARATOR_VALUE", ContextConstants.UPLOAD_SEPARATOR_VALUE); log.info("初始化系统参数结束..."); } }

java.lang.ClassNotFoundException如何解决

java.lang.ClassNotFoundException: io.dcloud.appstream.StreamAppMainActivity Android studio整合5+SDK,然后导入别人的依赖包进行开发,每次到一定的步骤后就会报这个错误,不知道如何错在什么地方,jar包什么的好像也不会少。

ClassNotFoundException:

问题描述: 昨天下午开始复习javaweb时候 准备重温一遍LoginServlet 遇到了一个之前没遇到的问题 点击登陆按钮后 提示错误500 Myeclipse 错误信息如下: 严重: Allocate exception for servlet Login java.lang.ClassNotFoundException: com.servlet.Login at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1285) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:520) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:501) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1050) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:779) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:789) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1437) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) 问题已经解决 根源是class没有立刻生成 XML文件配置正确 但是class在servlet创建后没有生成 解决方法 在Myeclipse 界面的 projecet 选项里面的 Build Automatically 打上对勾即可

加上自定义Application之后报错(ClassNotFoundException)

### 相关代码 Application类: ```java package com.weyes.focus; import android.app.Application; public class MyApplication extends Application {} ``` AndroidManifest.xml: ```xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.weyes.focus"> <application android:name="com.weyes.focus.MyApplication" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest> ``` ### 问题描述 添加:`android:name="com.weyes.focus.MyApplication"` 项目在安卓5.0以上运行都没有问题。 在4.x上运行报错。我这里三台手机都报错,红米(4.2.1)、三星(4.3)、酷派(4.4.4)。 删除:`android:name="com.weyes.focus.MyApplication"` 所有手机运行正常。 ### 报错信息 ``` 01-06 15:28:08.720 25650-25650/? E/AndroidRuntime: FATAL EXCEPTION: main java.lang.RuntimeException: Unable to get provider com.luck.picture.lib.PictureFileProvider: java.lang.ClassNotFoundException: Didn't find class "com.luck.picture.lib.PictureFileProvider" on path: DexPathList[dexElements=[zip file "/data/app/com.weyes.focus-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.weyes.focus-1, /vendor/lib, /system/lib]] at android.app.ActivityThread.installProvider(ActivityThread.java:5115) at android.app.ActivityThread.installContentProviders(ActivityThread.java:4670) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4606) at android.app.ActivityThread.access$1300(ActivityThread.java:162) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1414) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:153) at android.app.ActivityThread.main(ActivityThread.java:5383) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.luck.picture.lib.PictureFileProvider" on path: DexPathList[dexElements=[zip file "/data/app/com.weyes.focus-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.weyes.focus-1, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53) at java.lang.ClassLoader.loadClass(ClassLoader.java:501) at java.lang.ClassLoader.loadClass(ClassLoader.java:461) at android.app.ActivityThread.installProvider(ActivityThread.java:5100) at android.app.ActivityThread.installContentProviders(ActivityThread.java:4670)  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4606)  at android.app.ActivityThread.access$1300(ActivityThread.java:162)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1414)  at android.os.Handler.dispatchMessage(Handler.java:99)  at android.os.Looper.loop(Looper.java:153)  at android.app.ActivityThread.main(ActivityThread.java:5383)  at java.lang.reflect.Method.invokeNative(Native Method)  at java.lang.reflect.Method.invoke(Method.java:511)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)  at dalvik.system.NativeStart.main(Native Method)  ``` 这里报错说找不到这个类`com.luck.picture.lib.PictureFileProvider`,其实不单单是这个类,而是所有类都找不到,但这些类确实都是存在的,也就是类加载的时候就有问题了,实在不知道哪里出了问题,哪路大神碰过类似的问题么?求指教!

java.lang.IllegalArgumentException: object is not an instance of declaring class

目的:将目标xml的内容解析到一个java对象里边(xml的各个标签有对应的java类,并且有包含关系)。 ----------------------------------------------------------------------------------- NginxCache配置文件: <?xml version="1.0" encoding="utf-8"?> <nginx-cache> <cacheable> <include> <pattern params="a,b"> XXXAction/getXXX.rdm </pattern> <pattern params="a,b"> XXXBction/getXXX.rdm </pattern> </include> <exclude> <pattern params=""> XXXAction/getXXX.rdm </pattern> <pattern params=""> XXXBction/getXXX.rdm </pattern> </exclude> </cacheable> <cache-evict> <act pattern="XXXAction/addXXX.rdm" params="a,b"> <evict pattern="" methodRef=""> </evict> <evict pattern="" methodRef=""> </evict> </act> <method id="" name="" class="" returnType=""> <param index="1" default="c"></param> <param index="2" value="a"></param> </method> <method id="" name="" class="" returnType=""> <param index="1" default="c"></param> <param index="2" value="a"></param> </method> </cache-evict> </nginx-cache> --------------------------------------------------------------------------------- 对应的java类 --------------------------------------------------------------------------------- 具体设计思路:在解析到某个Element时调用 traverseOneElement(Element element,Object oneObj)方法;//element是遍历到对应的节点,oneObj是这个节点对应的对象。(刚开始只需要传一个确定的根类的对象即可) 在这个方法里遍历这个element的子节点,对每个子节点的element的Name用反射动态的创建对象,然后利用反射动态调用oneObj set方法,将对应的子节点对象set进去,然后,再调用 traverseOneElement(Element child_element,Object child_Obj);这样设计的, 第一次能设置成功,但是到第二次用子对象来get某个属性的时候会报这个错,不知道啥原因,请高手指教!!! ---------------------------------------------------------------------------------- 报错: java.lang.IllegalArgumentException: object is not an instance of declaring class at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.iwint.rdm.utils.RDMPropertyUtil.getProperty(RDMPropertyUtil.java:60) at com.iwint.rdm.nginxcache.bean.NginxCache.traverseOneElement(NginxCache.java:91) at com.iwint.rdm.nginxcache.bean.NginxCache.main(NginxCache.java:79) ------------------------------------------------------------------------------ package com.iwint.rdm.nginxcache.bean; import java.util.Iterator; import java.util.Map; import org.apache.commons.collections.map.HashedMap; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; import com.iwint.rdm.utils.Dom4jUtil; import com.iwint.rdm.utils.RDMPropertyUtil; /** * @ClassName: NginxCache * @Description: 解析NginxCache.xml用的标签类。 * @author yuanchangyou * @date 2013-9-27 * */ public class NginxCache { private static Map<String,String> classAndBiaoqian; private static NginxCache nginxCache=new NginxCache(); private Cacheable cacheable=new Cacheable(); private CacheEvict cacheEvict=new CacheEvict(); public NginxCache() { } public Cacheable getCacheable() { return cacheable; } public CacheEvict getCacheEvict() { return cacheEvict; } public void setCacheable(Cacheable cacheable) { this.cacheable = cacheable; } public void setCacheEvict(CacheEvict cacheEvict) { this.cacheEvict = cacheEvict; } public static NginxCache parseNginxCache() throws InstantiationException, IllegalAccessException, ClassNotFoundException{ //产生一个解析器对象 SAXReader reader = new SAXReader(); Document document = Dom4jUtil.parse2Document("D:/work/newEclipseWorkSpaces/rdm/src/main/resources/config/NginxCache.xml"); //获取文档的根元素 Element root = document.getRootElement(); NginxCache nginxcache=new NginxCache(); System.out.println(root.getName()); if(root.getName().equals("nginx-cache")) //遍历节点 traverseOneElement(root,nginxcache); return null; } public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException { classAndBiaoqian=new HashedMap(); classAndBiaoqian.put("nginx-cache", NginxCache.class.getName()); classAndBiaoqian.put("cacheable", Cacheable.class.getName()); classAndBiaoqian.put("pattern", UrlIPattern.class.getName()); classAndBiaoqian.put("cache-evict", CacheEvict.class.getName()); classAndBiaoqian.put("nginx-cache", Act.class.getName()); classAndBiaoqian.put("include","include"); classAndBiaoqian.put("exclude", "exclude"); // parseNginxCache(); SAXReader reader = new SAXReader(); Document document = Dom4jUtil.parse2Document("D:/work/newEclipseWorkSpaces/rdm/src/main/resources/config/NginxCache.xml"); //获取文档的根元素 Element root = document.getRootElement(); // NginxCache nginxcache=new NginxCache(); // if(root.getName().equals("nginx-cache")) //遍历根节点 traverseOneElement(root,nginxCache); } public static void traverseOneElement(Element element,Object oneObj) throws InstantiationException, IllegalAccessException, ClassNotFoundException{ // if(element.getName().equals("nginx-cache")){} Object chdil; System.out.println(element.getName()); for( Iterator iter = element.elementIterator(); iter.hasNext();){ Element elmt=(Element) iter.next(); if(elmt.getName().equals("cacheable")||elmt.getName().equals("cache-evict")){ chdil=RDMPropertyUtil.createObjByName(classAndBiaoqian.get(elmt.getName())); RDMPropertyUtil.setProperty(oneObj, elmt.getName(),chdil); Object chidObj=RDMPropertyUtil.getProperty(oneObj, elmt.getName()); traverseOneElement(elmt, chidObj); } else if(elmt.getName().equals("include")||elmt.getName().equals("exclude")||elmt.getName().equals("act")||elmt.getName().equals("method")){ Object newchil=RDMPropertyUtil.getProperty(oneObj,classAndBiaoqian.get(elmt.getName())); traverseOneElement(elmt, newchil); } else if(elmt.getName().equals("pattern")||elmt.getName().equals("param")){ } } } } ---------- package com.iwint.rdm.utils; import java.lang.reflect.Method; import java.lang.reflect.Field; import java.beans.PropertyDescriptor; public class RDMPropertyUtil { public static PropertyDescriptor getPropertyDescriptor(Class clazz, String propertyName) { StringBuffer sb = new StringBuffer(); // 构建一个可变字符串用来构建方法名称 Method setMethod = null; Method getMethod = null; PropertyDescriptor pd = null; try { Field f = clazz.getDeclaredField(propertyName); // 根据字段名来获取字段 if (f != null) { // 构建方法的后缀 String methodEnd = propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1); sb.append("set" + methodEnd); // 构建set方法 setMethod = clazz.getDeclaredMethod(sb.toString(), new Class[] { f.getType() }); sb.delete(0, sb.length());// 清空整个可变字符串 sb.append("get" + methodEnd); // 构建get方法 // 构建get 方法 getMethod = clazz.getDeclaredMethod(sb.toString(), new Class[] {}); // 构建一个属性描述器 把对应属性 propertyName 的 get 和 set 方法保存到属性描述器中 pd = new PropertyDescriptor(propertyName, getMethod, setMethod); } } catch (Exception ex) { ex.printStackTrace(); } return pd; } //动态调用obj对象的set方法(propertyName为属性名,value为值) public static void setProperty(Object obj, String propertyName, Object value) throws InstantiationException, IllegalAccessException { if(obj==null){ obj=obj.getClass().newInstance(); } Class clazz = obj.getClass();// 获取对象的类型 PropertyDescriptor pd = getPropertyDescriptor(clazz, propertyName); // 获取 clazz 类型中的 propertyName 的属性描述器 Method setMethod = pd.getWriteMethod();// 从属性描述器中获取 set 方法 try { setMethod.invoke(obj, new Object[] { value });// 调用 set // 方法将传入的value值保存属性中去 } catch (Exception e) { e.printStackTrace(); } } //动态调用obj对象的get方法(propertyName为属性名) public static Object getProperty(Object obj, String propertyName) throws InstantiationException, IllegalAccessException { Class clazz = obj.getClass();// 获取对象的类型 // 获取clazz类型中的propertyName的属性描述器 PropertyDescriptor pd = getPropertyDescriptor(clazz, propertyName); Method getMethod = pd.getReadMethod();// 从属性描述器中获取 get 方法 Object value = null; try { value = getMethod.invoke(clazz, new Object[] {});// 调用方法获取方法的返回值 } catch (Exception e) { e.printStackTrace(); } return value;// 返回值 } //动态创建一个对象,classname 为该类的全名 public static Object createObjByName(String className) throws InstantiationException, IllegalAccessException, ClassNotFoundException{ return Class.forName(className).newInstance(); } }

Android运行报错 求大神指导

12-01 20:49:04.872: D/AndroidRuntime(2097): Shutting down VM 12-01 20:49:04.872: W/dalvikvm(2097): threadid=1: thread exiting with uncaught exception (group=0xb4addb90) 12-01 20:49:04.922: E/AndroidRuntime(2097): FATAL EXCEPTION: main 12-01 20:49:04.922: E/AndroidRuntime(2097): Process: com.doudou, PID: 2097 12-01 20:49:04.922: E/AndroidRuntime(2097): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.doudou/com.doudou.DadoudouActivity}: java.lang.ClassNotFoundException: Didn't find class "com.doudou.DadoudouActivity" on path: DexPathList[[zip file "/data/app/com.doudou-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.doudou-1, /system/lib]] 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2102) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread.access$700(ActivityThread.java:135) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.os.Handler.dispatchMessage(Handler.java:102) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.os.Looper.loop(Looper.java:137) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread.main(ActivityThread.java:4998) 12-01 20:49:04.922: E/AndroidRuntime(2097): at java.lang.reflect.Method.invokeNative(Native Method) 12-01 20:49:04.922: E/AndroidRuntime(2097): at java.lang.reflect.Method.invoke(Method.java:515) 12-01 20:49:04.922: E/AndroidRuntime(2097): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777) 12-01 20:49:04.922: E/AndroidRuntime(2097): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593) 12-01 20:49:04.922: E/AndroidRuntime(2097): at dalvik.system.NativeStart.main(Native Method) 12-01 20:49:04.922: E/AndroidRuntime(2097): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.doudou.DadoudouActivity" on path: DexPathList[[zip file "/data/app/com.doudou-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.doudou-1, /system/lib]] 12-01 20:49:04.922: E/AndroidRuntime(2097): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 12-01 20:49:04.922: E/AndroidRuntime(2097): at java.lang.ClassLoader.loadClass(ClassLoader.java:497) 12-01 20:49:04.922: E/AndroidRuntime(2097): at java.lang.ClassLoader.loadClass(ClassLoader.java:457) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.Instrumentation.newActivity(Instrumentation.java:1061) 12-01 20:49:04.922: E/AndroidRuntime(2097): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2093) 12-01 20:49:04.922: E/AndroidRuntime(2097): ... 11 more 12-01 20:49:07.812: I/Process(2097): Sending signal. PID: 2097 SIG: 9

java.lang.NullPointerException cannot be cast to cn.bmob.v3.exception.BmobException

``` // BmobException 继承自 Exception // MyData 继承自 BmobOject @Override public void onClick(View view) { switch (view.getId()) { case R.id.btn_add: MyData myData=new MyData(); myData.setName("小王"); myData.setSex(男); // //类型转换异常 // myData.save(new SaveListener<String>() { @Override public void done(String s, BmobException e){ if (e==null){ LogUtils.i("新增成功"+s); } }); break; ``` 运行时报错闪退,我是一个自学de小白,这种异常的类型转换我没遇到过,请求大家帮帮我呀

穿山甲安卓demo为何运行不了

我把穿山甲的安卓DEMO导入eclipse后 有很多报错 一些为解决了 但是像styles.xml这个文件里 <!-- 主题配置 --> <style name="Theme.Light.NoActionBar" parent="Theme.AppCompat.Light"> <item name="android:windowActionBar">false</item> <item name="android:windowNoTitle">true</item> </style> <style name="Theme.Dialog.TTDownload" parent="Theme.AppCompat.Light.Dialog" tools:keep="@style/Theme_Dialog_TTDownload"> <item name="android:windowNoTitle">?android:attr/windowNoTitle</item> <item name="android:windowBackground">@color/white</item> </style> 有如下报错: error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light'. error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.Dialog'. 哪位大佬有空帮忙看看?

关于如何在Eclispe中使用V7包下的Toolbar

现在想按照大神们的博客改造自己的ActionBar,自己写了一个测试项目,但运行总是奔溃,代码如下 package com.example.testapplication; import android.app.Activity; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.Window; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); requestWindowFeature(Window.FEATURE_NO_TITLE); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); // toolbar.setNavigationIcon(R.mipmap.ic_launcher);//设置导航栏图标 toolbar.setLogo(R.drawable.ic_launcher);//设置app logo toolbar.setTitle("Title");//设置主标题 toolbar.setSubtitle("Subtitle");//设置子标题 toolbar.inflateMenu(R.menu.activity_tool_bar);//设置右上角的填充菜单 //点击事件 toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { switch (item.getItemId()){ case R.id.action_item1: //........ case R.id.action_item2: //........ } return true; } }); } } 布局如下 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.testapplication.MainActivity" > <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ff0" > </android.support.v7.widget.Toolbar> </LinearLayout> 报错提示: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.testapplication.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.testapplication-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.testapplication-2, /system/lib]] 搞了两天了,Toolbar连样子都没见到,谢谢各位大N先!!!

android打开activity报错崩溃

今天腾讯bugly给我反馈的问题 在oppo4.0的手机上 打开我项目的直播界面报错并崩溃  super.onCreate(savedInstanceState); 这句代码崩溃的~ 网上的大神说的都是引用第三份的问题 实在无法解决 求帮助 Caused by: 5 java.lang.ClassNotFoundException:Didn't find class "android.media.projection.MediaProjection" on path: DexPathList[[dex file "dalvik.system.DexFile@4362e4a0", dex file "dalvik.system.DexFile@43651f50", dex file "dalvik.system.DexFile@43665af8", zip file "/data/app/cn.dlc.Baimi-1.apk"],nativeLibraryDirectories=[/data/app-lib/cn.dlc.Baimi-1, /vendor/lib, /system/lib]] 6 dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 7 java.lang.ClassLoader.loadClass(ClassLoader.java:497) 8 java.lang.ClassLoader.loadClass(ClassLoader.java:457) 9 java.lang.Class.getDeclaredMethods(Native Method) 10 java.lang.Class.getPublicMethodsRecursive(Class.java:894) 11 java.lang.Class.getMethods(Class.java:877) 12 org.greenrobot.eventbus.SubscriberMethodFinder.findUsingReflectionInSingleClass(SubscriberMethodFinder.java:157) 13 org.greenrobot.eventbus.SubscriberMethodFinder.findUsingInfo(SubscriberMethodFinder.java:88) 14 org.greenrobot.eventbus.SubscriberMethodFinder.findSubscriberMethods(SubscriberMethodFinder.java:64) 15 org.greenrobot.eventbus.EventBus.register(EventBus.java:140) 16 cn.dlc.commonlibrary.ui.activity.BaseCommonActivity.onCreate(BaseCommonActivity.java:92) 17 cn.dlc.Baimi.base.activity.BaseActivity.onCreate(BaseActivity.java:99) 18 cn.dlc.Baimi.base.activity.BaseShareActivity.onCreate(BaseShareActivity.java:47) 19 cn.dlc.Baimi.game.activity.GameActivity.onCreate(GameActivity.java:229)

在外部 JAR 上"转换到 Dalvik 格式失败,错误1"

<div class="post-text" itemprop="text"> <p>In my Android application in Eclipse I get the following error.</p> <blockquote> <p>UNEXPECTED TOP-LEVEL EXCEPTION:<br> java.lang.IllegalArgumentException: already added: Lorg/xmlpull/v1/XmlPullParser;<br> ....<br> Conversion to Dalvik format failed with error 1<br></p> </blockquote> <p>This error only appears when I add a specific external JAR file to my project. I searched for a long time for the possible solution, but none of the possible solutions work. I even tried to change to Android 1.6 instead of 1.5 (the current version I use).</p> </div> <p>转载于:https://stackoverflow.com/questions/2680827/conversion-to-dalvik-format-failed-with-error-1-on-external-jar</p>

android APP连接mysql时,APP闪退

安卓程序连接MySQL一直不成功,本地连接可以。我是用手机调试的,点击接mysql按钮时,APP闪退。在网上找了好多方法都不行。求看看什么问题 错误日志如下: 2019-08-25 08:25:33.377 5570-5570/mark.zhang E/AndroidRuntime: FATAL EXCEPTION: main Process: mark.zhang, PID: 5570 java.lang.IllegalStateException: Could not execute method for android:onClick at android.view.View$DeclaredOnClickListener.onClick(View.java:5692) at android.view.View.performClick(View.java:6663) at android.view.View.performClickInternal(View.java:6635) at android.view.View.access$3100(View.java:794) at android.view.View$PerformClick.run(View.java:26199) at android.os.Handler.handleCallback(Handler.java:907) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:216) at android.app.ActivityThread.main(ActivityThread.java:7625) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at android.view.View$DeclaredOnClickListener.onClick(View.java:5687) at android.view.View.performClick(View.java:6663)  at android.view.View.performClickInternal(View.java:6635)  at android.view.View.access$3100(View.java:794)  at android.view.View$PerformClick.run(View.java:26199)  at android.os.Handler.handleCallback(Handler.java:907)  at android.os.Handler.dispatchMessage(Handler.java:105)  at android.os.Looper.loop(Looper.java:216)  at android.app.ActivityThread.main(ActivityThread.java:7625)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)  Caused by: java.lang.BootstrapMethodError: Exception from call site #39 bootstrap method at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.<clinit>(AbandonedConnectionCleanupThread.java:58) at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:453) at java.lang.Class.forName(Class.java:378) at com.mysql.cj.jdbc.NonRegisteringDriver.<clinit>(NonRegisteringDriver.java:99) at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:453) at java.lang.Class.forName(Class.java:378) at mark.zhang.Util.openConnection(Util.java:16) at mark.zhang.Main.onConn(Main.java:30) at java.lang.reflect.Method.invoke(Native Method)  at android.view.View$DeclaredOnClickListener.onClick(View.java:5687)  at android.view.View.performClick(View.java:6663)  at android.view.View.performClickInternal(View.java:6635)  at android.view.View.access$3100(View.java:794)  at android.view.View$PerformClick.run(View.java:26199)  at android.os.Handler.handleCallback(Handler.java:907)  at android.os.Handler.dispatchMessage(Handler.java:105)  at android.os.Looper.loop(Looper.java:216)  at android.app.ActivityThread.main(ActivityThread.java:7625)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)  Caused by: java.lang.ClassCastException: Bootstrap method returned null at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.<clinit>(AbandonedConnectionCleanupThread.java:58)  at java.lang.Class.classForName(Native Method)  at java.lang.Class.forName(Class.java:453)  at java.lang.Class.forName(Class.java:378)  at com.mysql.cj.jdbc.NonRegisteringDriver.<clinit>(NonRegisteringDriver.java:99)  at java.lang.Class.classForName(Native Method)  at java.lang.Class.forName(Class.java:453)  at java.lang.Class.forName(Class.java:378)  at mark.zhang.Util.openConnection(Util.java:16)  at mark.zhang.Main.onConn(Main.java:30)  at java.lang.reflect.Method.invoke(Native Method)  at android.view.View$DeclaredOnClickListener.onClick(View.java:5687)  at android.view.View.performClick(View.java:6663)  at android.view.View.performClickInternal(View.java:6635)  at android.view.View.access$3100(View.java:794)  at android.view.View$PerformClick.run(View.java:26199)  at android.os.Handler.handleCallback(Handler.java:907)  at android.os.Handler.dispatchMessage(Handler.java:105)  at android.os.Looper.loop(Looper.java:216)  at android.app.ActivityThread.main(ActivityThread.java:7625)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)  2019-08-25 08:25:33.398 5570-5570/mark.zhang I/Process: Sending signal. PID: 5570 SIG: 9 源码如下: 这是util.java ``` package mark.zhang; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class Util { public static Connection openConnection(String url, String user, String password) { Connection conn = null; try { final String DRIVER_NAME = "com.mysql.cj.jdbc.Driver"; Class.forName(DRIVER_NAME); conn = DriverManager.getConnection(url, user, password); } catch (ClassNotFoundException e) { conn = null; } catch (SQLException e) { conn = null; } return conn; } public static void query(Connection conn, String sql) { if (conn == null) { return; } Statement statement = null; ResultSet result = null; try { statement = conn.createStatement(); result = statement.executeQuery(sql); if (result != null && result.first()) { int idColumnIndex = result.findColumn("id"); int nameColumnIndex = result.findColumn("name"); System.out.println("id\t\t" + "name"); while (!result.isAfterLast()) { System.out.print(result.getString(idColumnIndex) + "\t\t"); System.out.println(result.getString(nameColumnIndex)); result.next(); } } } catch (SQLException e) { e.printStackTrace(); } finally { try { if (result != null) { result.close(); result = null; } if (statement != null) { statement.close(); statement = null; } } catch (SQLException sqle) { } } } public static boolean execSQL(Connection conn, String sql) { boolean execResult = false; if (conn == null) { return execResult; } Statement statement = null; try { statement = conn.createStatement(); if (statement != null) { execResult = statement.execute(sql); } } catch (SQLException e) { execResult = false; } return execResult; } } ``` 这是main.java ``` package mark.zhang; import com.mysql.cj.jdbc.AbandonedConnectionCleanupThread; import java.sql.Connection; import java.sql.SQLException; import androidx.appcompat.app.AppCompatActivity; import android.app.Activity; import android.os.Bundle; import android.view.View; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class Main extends Activity { private static final String REMOTE_IP = "223.104.64.237"; private static final String URL = "jdbc:mysql://223.104.64.237:3306/mydb?useSSL=false&serverTimezone=GMT&characterEncoding=utf-8&autoReconnect=true"; private static final String USER = "root"; private static final String PASSWORD = "123"; private Connection conn; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } public void onConn(View view) { conn = Util.openConnection(URL, USER, PASSWORD); /* final Thread thread = new Thread(new Runnable() { @Override public void run() { // 反复尝试连接,直到连接成功后退出循环 while (!Thread.interrupted()) { try { Thread.sleep(100); // 每隔0.1秒尝试连接 } catch (InterruptedException e) { System.out.println("链接数据库"); } // 2.设置好IP/端口/数据库名/用户名/密码等必要的连接信息 String url="jdbc:mysql://223.104.64.237:3306/mydb?useSSL=false&serverTimezone=Hongkong&characterEncoding=utf-8&autoReconnect=true"; String user = "root"; String password = "123"; // 3.连接JDBC try { Class.forName("com.mysql.cj.jdbc.Driver"); Connection conn = DriverManager.getConnection(url,user,password); System.out.println("远程连接成功!"); conn.close(); return; } catch (SQLException e) { System.out.println("远程连接失败!"); } catch (ClassNotFoundException e){ } } } }); thread.start();*/ } public void onInsert(View view) { String sql = "insert into mytable values(9, 'hanmeimei')"; Util.execSQL(conn, sql); } public void onDelete(View view) { String sql = "delete from mytable where name='mark'"; Util.execSQL(conn, sql); } public void onUpdate(View view) { String sql = "update mytable set name='李磊' where name='韩美'"; Util.execSQL(conn, sql); } public void onQuery(View view) { System.out.println("All users info:"); Util.query(conn, "select * from mytable"); } @Override protected void onDestroy() { super.onDestroy(); if (conn != null) { try { conn.close(); } catch (SQLException e) { conn = null; } finally { conn = null; } } } } ```

Android Studio中使用JUnit测试报错(ClassNotFoundException)

在Android Studio中编写测试类public class MyAppTest extends ActivityInstrumentationTestCase2报错: Exception in thread "main" java.lang.NoClassDefFoundError: junit/textui/ResultPrinter Caused by: java.lang.ClassNotFoundException: junit.textui.ResultPrinter 小的新手,求大神解答 T T

上班一个月,后悔当初着急入职的选择了

最近有个老铁,告诉我说,上班一个月,后悔当初着急入职现在公司了。他之前在美图做手机研发,今年美图那边今年也有一波组织优化调整,他是其中一个,在协商离职后,当时捉急找工作上班,因为有房贷供着,不能没有收入来源。所以匆忙选了一家公司,实际上是一个大型外包公司,主要派遣给其他手机厂商做外包项目。**当时承诺待遇还不错,所以就立马入职去上班了。但是后面入职后,发现薪酬待遇这块并不是HR所说那样,那个HR自...

副业收入是我做程序媛的3倍,工作外的B面人生是怎样的?

提到“程序员”,多数人脑海里首先想到的大约是:为人木讷、薪水超高、工作枯燥…… 然而,当离开工作岗位,撕去层层标签,脱下“程序员”这身外套,有的人生动又有趣,马上展现出了完全不同的A/B面人生! 不论是简单的爱好,还是正经的副业,他们都干得同样出色。偶尔,还能和程序员的特质结合,产生奇妙的“化学反应”。 @Charlotte:平日素颜示人,周末美妆博主 大家都以为程序媛也个个不修边幅,但我们也许...

MySQL数据库面试题(2020最新版)

文章目录数据库基础知识为什么要使用数据库什么是SQL?什么是MySQL?数据库三大范式是什么mysql有关权限的表都有哪几个MySQL的binlog有有几种录入格式?分别有什么区别?数据类型mysql有哪些数据类型引擎MySQL存储引擎MyISAM与InnoDB区别MyISAM索引与InnoDB索引的区别?InnoDB引擎的4大特性存储引擎选择索引什么是索引?索引有哪些优缺点?索引使用场景(重点)...

我说我不会算法,阿里把我挂了。

不说了,字节跳动也反手把我挂了。

抖音上很火的时钟效果

反正,我的抖音没人看,别人都有几十万个赞什么的。 发到CSDN上来,大家交流下~ 主要用到原生态的 JS+CSS3。 具体不解释了,看注释: &lt;!DOCTYPE html&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;meta charset="UTF-8"&gt; &lt;title&gt;Title&lt;/tit...

记录下入职中软一个月(外包华为)

我在年前从上一家公司离职,没想到过年期间疫情爆发,我也被困在家里,在家呆着的日子让人很焦躁,于是我疯狂的投简历,看面试题,希望可以进大公司去看看。 我也有幸面试了我觉得还挺大的公司的(虽然不是bat之类的大厂,但是作为一名二本计算机专业刚毕业的大学生bat那些大厂我连投简历的勇气都没有),最后选择了中软,我知道这是一家外包公司,待遇各方面甚至不如我的上一家公司,但是对我而言这可是外包华为,能...

为什么程序员做外包会被瞧不起?

二哥,有个事想询问下您的意见,您觉得应届生值得去外包吗?公司虽然挺大的,中xx,但待遇感觉挺低,马上要报到,挺纠结的。

手机经常收到"回复TD退订",回还是不回?今天总算是弄清楚了

自从有了微信和QQ,手机短信几乎很少再用了,但是我们手机里面还是经常会收到"回复TD退订"的消息,那到底要不要回复呢?今天就来告诉大家! 信息内容可能包括 推销信息 品牌活动日的时候,会根据你的用户浏览信息,或者购买记录,后续发送一些降价消息。 但是笔者想说我是缺那10块钱的人嘛,我缺的是1000块。 垃圾信息 虽然我们已经不经常用短信功能,但是还是有不少...

当HR压你价,说你只值7K,你该怎么回答?

当HR压你价,说你只值7K时,你可以流畅地回答,记住,是流畅,不能犹豫。 礼貌地说:“7K是吗?了解了。嗯~其实我对贵司的面试官印象很好。只不过,现在我的手头上已经有一份11K的offer。来面试,主要也是自己对贵司挺有兴趣的,所以过来看看……”(未完) 这段话主要是陪HR互诈的同时,从公司兴趣,公司职员印象上,都给予对方正面的肯定,既能提升HR的好感度,又能让谈判气氛融洽,为后面的发挥留足空间。...

面试官问我:如何加载100M的图片却不撑爆内存

还记得当年面试一个面试官问我怎么加载巨图才能不撑爆内存,我没回答上来,他说分片显示,我寻思特么分片能减少内存使用??现在可以打他脸了! 内容扩展 1.图片的三级缓存中,图片加载到内存中,如果内存快爆了,会发生什么?怎么处理? 2.内存中如果加载一张 500*500 的 png 高清图片.应该是占用多少的内存? 3.Bitmap 如何处理大图,如一张 30M 的大图,如何预防 OOM? A...

面试阿里p7,被按在地上摩擦,鬼知道我经历了什么?

面试阿里p7被问到的问题(当时我只知道第一个):@Conditional是做什么的?@Conditional多个条件是什么逻辑关系?条件判断在什么时候执...

又出事了?网站被攻击了?高中生?

北京时间2020年3月27日9点整,如往常一样来到公司,带开电脑,正准备打开Github网站看一会源代码,再开始手头的工作。哟吼,一直打不开,一直出现如下页面: 我想很多网友也尝到了甜头,各大技术群炸开了锅,据网友反馈有攻击者正在发起大规模的中间人挟持,京东和Github等网站等网站都受到了影响。 什么是中间中间人挟持呢? 简而言之,就是攻击者在数据网络传输的过程中,截获传输过程中的数据并篡改...

无代码时代来临,程序员如何保住饭碗?

编程语言层出不穷,从最初的机器语言到如今2500种以上的高级语言,程序员们大呼“学到头秃”。程序员一边面临编程语言不断推陈出新,一边面临由于许多代码已存在,程序员编写新应用程序时存在重复“搬砖”的现象。 无代码/低代码编程应运而生。无代码/低代码是一种创建应用的方法,它可以让开发者使用最少的编码知识来快速开发应用程序。开发者通过图形界面中,可视化建模来组装和配置应用程序。这样一来,开发者直...

培训班出来的人后来都怎么样了?(二)

接着上回说,培训班学习生涯结束了。后面每天就是无休止的背面试题,不是没有头脑的背,培训公司还是有方法的,现在回想当时背的面试题好像都用上了,也被问到了。回头找找面试题,当时都是打印下来天天看,天天背。 不理解呢也要背,面试造飞机,上班拧螺丝。班里的同学开始四处投简历面试了,很快就有面试成功的,刚开始一个,然后越来越多。不知道是什么原因,尝到胜利果实的童鞋,不满足于自己通过的公司,嫌薪水要少了,选择...

面试了一个 31 岁程序员,让我有所触动,30岁以上的程序员该何去何从?

最近面试了一个31岁8年经验的程序猿,让我有点感慨,大龄程序猿该何去何从。

6年开发经验女程序员,面试京东Java岗要求薪资28K

写在开头: 上周面试了一位女程序员,上午10::30来我们部门面试,2B哥接待了她.来看看她的简历: 个人简历 个人技能: ● 熟悉spring mvc 、spring、mybatis 等框架 ● 熟悉 redis 、rocketmq、dubbo、zookeeper、netty 、nginx、tomcat、mysql。 ● 阅读过juc 中的线程池、锁的源...

大三实习生,字节跳动面经分享,已拿Offer

说实话,自己的算法,我一个不会,太难了吧

程序员垃圾简历长什么样?

已经连续五年参加大厂校招、社招的技术面试工作,简历看的不下于万份 这篇文章会用实例告诉你,什么是差的程序员简历! 疫情快要结束了,各个公司也都开始春招了,作为即将红遍大江南北的新晋UP主,那当然要为小伙伴们做点事(手动狗头)。 就在公众号里公开征简历,义务帮大家看,并一一点评。《启舰:春招在即,义务帮大家看看简历吧》 一石激起千层浪,三天收到两百多封简历。 花光了两个星期的所有空闲时...

工作八年,月薪60K,裸辞两个月,投简历投到怀疑人生!

近日,有网友在某职场社交平台吐槽,自己裸辞两个月了,但是找工作却让自己的心态都要崩溃了,全部无果,不是已查看无回音,就是已查看不符合。 “工作八年,两年一跳,裸辞两个月了,之前月薪60K,最近找工作找的心态崩了!所有招聘工具都用了,全部无果,不是已查看无回音,就是已查看不符合。进头条,滴滴之类的大厂很难吗???!!!投简历投的开始怀疑人生了!希望 可以收到大厂offer” 先来看看网...

推荐9个能让你看一天的网站

分享的这9个保证另你意外的网站,每个都非常实用!非常干货!毫不客气的说,这些网站最少值10万块钱。 利用好这些网站,会让你各方面的技能都得到成长,不说让你走上人生巅峰,但对比现在的你,在眼界、学识、技能方面都有质的飞跃。 一、AIRPANO 传送门:https://www.airpano.com/360photo_list.php 这是一个可以躺在家里,就能环游世界的神奇网站。 世界那么大,绝大多...

大牛都会用的IDEA调试技巧!!!

导读 前天面试了一个985高校的实习生,问了他平时用什么开发工具,他想也没想的说IDEA,于是我抛砖引玉的问了一下IDEA的调试用过吧,你说说怎么设置断点...

都前后端分离了,咱就别做页面跳转了!统统 JSON 交互

文章目录1. 无状态登录1.1 什么是有状态1.2 什么是无状态1.3 如何实现无状态1.4 各自优缺点2. 登录交互2.1 前后端分离的数据交互2.2 登录成功2.3 登录失败3. 未认证处理方案4. 注销登录 这是本系列的第四篇,有小伙伴找不到之前文章,松哥给大家列一个索引出来: 挖一个大坑,Spring Security 开搞! 松哥手把手带你入门 Spring Security,别再问密...

月薪22K程序员,打卡迟到10次,收到工资短信一脸懵逼

每家公司为了保证公司员工每天的工作时间,一般都会采用上下班打卡的工作制度,这其实是一个很常见的是,本身也没有什么问题的。正所谓无规矩不成方圆,公司肯定是有公司的规矩,虽然每个员工都很不喜欢这些规矩来束缚我们,但是公司也只是为了能更好的管理员工。但是一家公司如果一成不变的使用打卡制度,而不会去变通管理,也真不一定是好事。 打卡制度特别对于销售部门来说,不但会让公司发展不起来,还很容易丢失员工。但如...

97年世界黑客编程大赛冠军作品(大小仅为16KB),惊艳世界的编程巨作

这是世界编程大赛第一名作品(97年Mekka ’97 4K Intro比赛)汇编语言所写。 整个文件只有4095个字节, 大小仅仅为16KB! 不仅实现了3D动画的效果!还有一段震撼人心的背景音乐!!! 内容无法以言语形容,实在太强大! 下面是代码,具体操作看最后! @echo off more +1 %~s0|debug e100 33 f6 bf 0 20 b5 10 f3 a5...

不要再到处使用 === 了

我们知道现在的开发人员都使用 === 来代替 ==,为什么呢?我在网上看到的大多数教程都认为,要预测 JavaScript 强制转换是如何工作这太复杂了,因此建议总是使用===。这些都...

什么是a站、b站、c站、d站、e站、f站、g站、h站、i站、j站、k站、l站、m站、n站?00后的世界我不懂!

A站 AcFun弹幕视频网,简称“A站”,成立于2007年6月,取意于Anime Comic Fun,是中国大陆第一家弹幕视频网站。A站以视频为载体,逐步发展出基于原生内容二次创作的完整生态,拥有高质量互动弹幕,是中国弹幕文化的发源地;拥有大量超粘性的用户群体,产生输出了金坷垃、鬼畜全明星、我的滑板鞋、小苹果等大量网络流行文化,也是中国二次元文化的发源地。 B站 全称“哔哩哔哩(bilibili...

十个摸鱼,哦,不对,是炫酷(可以玩一整天)的网站!!!

文章目录前言正文**1、Kaspersky Cyberthreat real-time map****2、Finding Home****3、Silk – Interactive Generative Art****4、Liquid Particles 3D****5、WINDOWS93****6、Staggering Beauty****7、Ostagram图片生成器网址****8、全历史网址*...

我真的错了,我被跳槽后的高薪冲昏了头脑...

国内疫情已接近尾声,疫情对生活各个方面造成的影响,就是一场真实的“蝴蝶效应”。“全球最大安全套制造商因疫情停产,已造成一亿个安全套缺口”“口罩印钞机,月入千万的暴富神话”“百程旅行...

终于,月薪过5万了!

来看几个问题想不想月薪超过5万?想不想进入公司架构组?想不想成为项目组的负责人?想不想成为spring的高手,超越99%的对手?那么本文内容是你必须要掌握的。本文主要详解bean的生命...

​能让德国人放弃现金支付​,也没谁了

在新冠疫情中,德国人越来越多地选择在超市,加油站或其他商店付款时使用非接触式付款方式。德国信贷协会Deutschen Kreditwirtschaft (DK) 的一位发言人告诉德国新...

相关热词 c# 局部 截图 页面 c#实现简单的文件管理器 c# where c# 取文件夹路径 c# 对比 当天 c# fir 滤波器 c# 和站 队列 c# txt 去空格 c#移除其他类事件 c# 自动截屏
立即提问