idea 项目创建Dao对象时编译报错-CSDN问答

idea 项目创建Dao对象时编译报错

@Autowired
private RealNameAppleDao realNameAppleDao;

加上这两句话编译就报错
package com.newlife.service.impl;

import com.newlife.dao.RealNameAppleDao;
import com.newlife.model.RealNameApple;
import com.newlife.service.RealNameAppleService;
import org.apache.tomcat.util.http.fileupload.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import java.io.*;
import java.util.List;

/**

Created by Administrator on 2016/7/25 0025. */ @Service @Transactional(propagation = Propagation.SUPPORTS, readOnly = true) public class RealNameAppleServiceImpl implements RealNameAppleService { // @Autowired // private RealNameAppleDao realNameAppleDao; // 不注释这两行程序跑步起来疑惑

// @Override
public String addModel(RealNameApple realNameApple,MultipartFile file1,MultipartFile file2) {}
}

    报错信息：Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1696)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
... 33 more

[2016-07-26 10:55:49,558] Artifact Gradle : newlife:NewLife : newlife.war: Error during artifact deployment. See server log for details.
26-Jul-2016 10:55:50.630 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory D:\xiangmu\gongju\apache-tomcat-8.0.36\webapps\manager
26-Jul-2016 10:55:50.702 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory D:\xiangmu\gongju\apache-tomcat-8.0.36\webapps\manager has finished in 71 ms

发布于：2016.07.26 02:53

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项目创建Dao对象时编译报错
@Autowired
private RealNameAppleDao realNameAppleDao;

加上这两句话编译就报错
package com.newlife.service.impl;
import com.newlife.dao.RealNameAppleDao;
import com.newlife.model.RealNameApple;
import com.newlife.service.RealNameAppleService;
import org.apache.tomcat.util.http.fileupload.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipar

发布于：2016.10.04 07:06

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DEBUG [http-nio-555-exec-10] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@552146ee] DEBUG [http-nio-555-exec-10] - ==> Preparing: insert into emp(id,empno,username,password,ename,sex,birthday,email,call,pname,deptno,state,permissions) values (?,?,?,?,?,?,?,?,?,?,?,?,?) DEBUG [http-nio-555-exec-10] - ==> Parameters: 28(Integer), 028(String), test(String), test(String), 测试(String), 男(String), 2019-12-09(String), 777777777@qq.com(String), 11111111111(String), 接待员(String), 001(String), 在职(String), 普通员工(String) java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) DEBUG [http-nio-555-exec-10] - Rolling back JDBC Connection [com.mysql.jdbc.JDBC4Connection@552146ee] at java.lang.reflect.Method.invoke(Method.java:498) DEBUG [http-nio-555-exec-10] - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@552146ee] DEBUG [http-nio-555-exec-10] - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@552146ee] at com.cdx.psms.utils.TransactionInvocationHandler.invoke(TransactionInvocationHandler.java:30) DEBUG [http-nio-555-exec-10] - Returned connection 1428244206 to pool. at com.sun.proxy.$Proxy5.add(Unknown Source) at com.cdx.psms.controller.Emp_InsertAddServlet.doPost(Emp_InsertAddServlet.java:46) at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1579) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'call,pname,deptno,state,permissions) values (28,'028','test','te' at line 2 ### The error may exist in com/cdx/psms/mapper/EmpMapper.xml ### The error may involve emp.add-Inline ### The error occurred while setting parameters ### SQL: insert into emp(id,empno,username,password,ename,sex,birthday,email,call,pname,deptno,state,permissions) values (?,?,?,?,?,?,?,?,?,?,?,?,?) ### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'call,pname,deptno,state,permissions) values (28,'028','test','te' at line 2 at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:199) at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:184) at com.cdx.psms.dao.EmpDaoImpl.add(EmpDaoImpl.java:42) at com.cdx.psms.service.EmpServiceImpl.add(EmpServiceImpl.java:26) ... 31 more Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'call,pname,deptno,state,permissions) values (28,'028','test','te' at line 2 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.Util.getInstance(Util.java:408) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:944) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3933) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3869) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2524) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2675) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2465) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1912) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1251) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59) at com.sun.proxy.$Proxy7.execute(Unknown Source) at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47) at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74) at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50) at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197) ... 34 more ```

运行报错，大佬们帮忙看看什么原因java.util.concurrent.ExecutionException: "C:\Program Files\Java\jdk1.8.0_201\bin\java" "-Dmaven.multiModuleProjectDirectory=C:\Users\Administrator\Desktop\travel - 副本" -Dfile.encoding=gb2312 "-Dmaven.home=C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.6\plugins\maven\lib\maven3" "-Dclassworlds.conf=C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.6\plugins\maven\lib\maven3\bin\m2.conf" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.6\lib\idea_rt.jar=51249:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.6\bin" -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.6\plugins\maven\lib\maven3\boot\plexus-classworlds-2.5.2.jar" org.codehaus.classworlds.Launcher -Didea.version=2017.2.6 tomcat7:run [INFO] Scanning for projects... [WARNING] [WARNING] Some problems were encountered while building the effective model for cn.itcast:travel:war:1.0-SNAPSHOT [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 131, column 21 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building travel 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] >>> tomcat7-maven-plugin:2.1:run (default-cli) > process-classes @ travel >>> [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ travel --- [WARNING] Using platform encoding (gb2312 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 3 resources [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ travel --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 40 source files to C:\Users\Administrator\Desktop\travel - 副本\target\classes [WARNING] /C:/Users/Administrator/Desktop/travel - 副本/src/main/java/cn/itcast/travel/dao/impl/FindDaoImpl.java: 某些输入文件使用了未经检查或不安全的操作。 [WARNING] /C:/Users/Administrator/Desktop/travel - 副本/src/main/java/cn/itcast/travel/dao/impl/FindDaoImpl.java: 有关详细信息, 请使用 -Xlint:unchecked 重新编译。 [INFO] [INFO] <<< tomcat7-maven-plugin:2.1:run (default-cli) < process-classes @ travel <<< [INFO] [INFO] --- tomcat7-maven-plugin:2.1:run (default-cli) @ travel --- [INFO] Running war on http://localhost:80/travel [INFO] Using existing Tomcat server configuration at C:\Users\Administrator\Desktop\travel - 副本\target\tomcat [INFO] create webapp with contextPath: /travel 七月 21, 2019 5:00:20 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["http-bio-80"] 七月 21, 2019 5:00:20 下午 org.apache.catalina.core.StandardService startInternal 信息: Starting service Tomcat 七月 21, 2019 5:00:20 下午 org.apache.catalina.core.StandardEngine startInternal 信息: Starting Servlet Engine: Apache Tomcat/7.0.37 七月 21, 2019 5:00:21 下午 org.apache.catalina.core.ContainerBase startInternal 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/travel]] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/travel]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 6 more Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> #write/* in servlet mapping at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3223) at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3198) at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1366) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1353) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5179) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 6 more 七月 21, 2019 5:00:21 下午 org.apache.catalina.core.ContainerBase startInternal 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1091) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:512) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288) at org.apache.maven.cli.MavenCli.main(MavenCli.java:199) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) at org.codehaus.classworlds.Launcher.main(Launcher.java:47) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 6 more [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.989 s [INFO] Finished at: 2019-07-21T17:00:21+08:00 [INFO] Final Memory: 32M/279M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.tomcat.maven:tomcat7-maven-plugin:2.1:run (default-cli) on project travel: Could not start Tomcat: Failed to start component [StandardServer[-1]]: Failed to start component [StandardService[Tomcat]]: Failed to start component [StandardEngine[Tomcat]]: A child container failed during start -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException Process finished with exit code 1

我写的public类为什么不能import？: 我照着网上的教程写一个简单的ssm，先写了一个User实体类 ![图片说明](https://img-ask.csdn.net/upload/201907/18/1563447966_526532.jpg) 然后写它的dao层，但是发现不能import，明明都能点出来，但是按下回车却会报错 ![图片说明](https://img-ask.csdn.net/upload/201907/18/1563446827_922861.jpg) ![图片说明](https://img-ask.csdn.net/upload/201907/18/1563446841_284950.jpg) ![图片说明](https://img-ask.csdn.net/upload/201907/18/1563462437_179206.jpg) 我在网上看到的解决方法，什么重新编译，重新导入项目，清缓存重启idea都试了，没有效果。求解

搭建SSM项目, pom文件的 Spring的依赖疑问, 可以这样设置 Spring的依赖么?: **1. 问题描述:** 在尝试这搭建 SSM 项目的过程中, 我是看着 Spring的结构图去添加 pom.xml 中的依赖的, 比如 core部分只需要添加 spring-context 依赖即可. 然后 context 会自动去依赖 core, beans, aop, expression. 所以, 在搭建SSM项目时, Spring 依赖我只添加六个了 context, orm, webmvc, context-support, aspects, test 如果不需要日志和测试的话, 后面两个去掉也是可以的. 请问各位大佬, 这样子搭建, 符不符合规范??? ** 2. 相关代码:** ``` <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.itssm</groupId> <artifactId>ssmDemo</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging>  <properties>  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>  <spring.version>4.3.10.RELEASE</spring.version>  <mybatis.version>3.4.4</mybatis.version> <mybatis-spring.version>1.3.1</mybatis-spring.version>  <mysql-connector.version>5.1.38</mysql-connector.version> <druid.version>1.0.6</druid.version>  <fastjson.version>1.2.35</fastjson.version>  <servlet.version>2.5</servlet.version> <jstl.version>1.2</jstl.version>  <log4j.version>1.2.17</log4j.version> <slf4j.version>1.7.25</slf4j.version> </properties> <dependencies>   <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version>  </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </exclusion> </exclusions> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> </exclusion> </exclusions> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> </exclusion> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </exclusion> </exclusions> </dependency>  <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency>  <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency>  <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql-connector.version}</version> </dependency>  <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency>  <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>${servlet.version}</version> <scope>provided</scope> </dependency>  <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency>  <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency>  <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency>  <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency>  <dependency> <groupId>org.javassist</groupId> <artifactId>javassist</artifactId> <version>3.20.0-GA</version> </dependency>  </dependencies> <build> <finalName>ssmDemo</finalName>  <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </build> </project> ```

Log4j2启动报错，ava.lang.NoSuchMethodError: Caused by: java.lang.NoSuchMethodError: org.apache.logging.log4j.core.util.FileUtils.getCorrectedFilePathUri(Ljava/lang/String;)Ljava/net/URI; at org.apache.logging.log4j.web.Log4jWebInitializerImpl.getConfigURI(Log4jWebInitializerImpl.java:193) at org.apache.logging.log4j.web.Log4jWebInitializerImpl.initializeNonJndi(Log4jWebInitializerImpl.java:156) at org.apache.logging.log4j.web.Log4jWebInitializerImpl.start(Log4jWebInitializerImpl.java:107) at org.apache.logging.log4j.web.Log4jServletContainerInitializer.onStartup(Log4jServletContainerInitializer.java:57) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5669) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) ... 42 more Jul 02, 2018 1:19:18 PM org.apache.tomcat.util.modeler.BaseModelMBean invoke 严重: Exception invoking method manageApp java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1021) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Jul 02, 2018 1:19:18 PM org.apache.tomcat.util.modeler.BaseModelMBean invoke 严重: Exception invoking method createStandardContext javax.management.RuntimeOperationsException: Exception invoking method manageApp at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:309) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357) at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:835) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1021) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) ... 33 more Jul 02, 2018 1:19:23 PM org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory /usr/local/apache-tomcat-7.0.88/webapps/manager Jul 02, 2018 1:19:23 PM org.apache.catalina.startup.TldConfig execute ``` ``` 下面是pom文件 ``` <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.konglin</groupId> <artifactId>SmartCompus</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>SmartCompus Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <spring.version>4.2.5.RELEASE</spring.version> <mybatis.version>3.2.8</mybatis.version> <slf4j.version>1.7.18</slf4j.version> <log4j.version>2.5</log4j.version> <mysql.driver.version>5.1.21</mysql.driver.version> <commons-fileupload.version>1.3</commons-fileupload.version> <servlet.version>3.1.0</servlet.version> <spring-mybatis.version>1.2.2</spring-mybatis.version> <fastjson.version>1.1.41</fastjson.version> <jackson.version>2.3.0</jackson.version> <quartz.versison>1.8.5</quartz.versison> <httpclient.version>3.1</httpclient.version> <jstl.version>1.2</jstl.version> <shiro.version>1.2.3</shiro.version> <lombok.version>1.16.18</lombok.version> <json.version>2.4</json.version> <poi.version>3.14</poi.version> <gexin.http.version>4.0.1.17</gexin.http.version> <maven.pluin.version>2.5.2</maven.pluin.version> </properties> <dependencies>  <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${servlet.version}</version> </dependency>   <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency>  <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency>  <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${spring-mybatis.version}</version> </dependency>  <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.driver.version}</version> <scope>runtime</scope> </dependency>  <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-web</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency>  <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency>  <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency>  <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>${quartz.versison}</version> </dependency>  <dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>${httpclient.version}</version> </dependency>  <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency>  <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-all</artifactId> <version>${shiro.version}</version> </dependency>  <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> <scope>provided</scope> </dependency>   <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>${json.version}</version> <classifier>jdk15</classifier> </dependency>  <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>${poi.version}</version> </dependency>  <dependency> <groupId>com.gexin.platform</groupId> <artifactId>gexin-rp-sdk-http</artifactId> <version>${gexin.http.version}</version> </dependency>  <dependency> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-release-plugin</artifactId> <version>${maven.pluin.version}</version> </dependency> </dependencies> <repositories> <repository> <id>getui-nexus</id> <url>http://mvn.gt.igexin.com/nexus/content/repositories/releases/</url> </repository> </repositories> <build> <finalName>SmartCompus</finalName> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.1</version> <configuration> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> <resources> <resource> <directory>src/main/resources</directory> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build> </project> ``` 下面是控制的日志 ``` Connected to server [2018-07-02 06:46:01,281] Artifact SmartCompus:war exploded: Artifact is being deployed, please wait... Jul 02, 2018 6:46:01 PM org.apache.catalina.loader.WebappClassLoaderBase validateJarFile 信息: validateJarFile(/Users/albert/Workspace/IDEA/SmartCompus/target/SmartCompus/WEB-INF/lib/javax.servlet-api-3.1.0.jar) - jar not loaded. See Servlet Spec 3.0, section 10.7.2. Offending class: javax/servlet/Servlet.class Jul 02, 2018 6:46:06 PM org.apache.catalina.startup.TldConfig execute 信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/Users/albert/Workspace/IDEA/SmartCompus/target/SmartCompus/WEB-INF/lib/slf4j-jdk14-1.5.6.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/Users/albert/Workspace/IDEA/SmartCompus/target/SmartCompus/WEB-INF/lib/slf4j-log4j12-1.7.18.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/Users/albert/Workspace/IDEA/SmartCompus/target/SmartCompus/WEB-INF/lib/slf4j-nop-1.5.3.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: The requested version 1.5.6 by your slf4j binding is not compatible with [1.6] SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details. Jul 02, 2018 6:46:07 PM org.apache.catalina.core.StandardContext startInternal 严重: One or more listeners failed to start. Full details will be found in the appropriate container log file Jul 02, 2018 6:46:07 PM org.apache.catalina.core.StandardContext startInternal 严重: Context [] startup failed due to previous errors [2018-07-02 06:46:07,299] Artifact SmartCompus:war exploded: Error during artifact deployment. See server log for details. Jul 02, 2018 6:46:11 PM org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory /usr/local/apache-tomcat-7.0.88/webapps/manager Jul 02, 2018 6:46:11 PM org.apache.catalina.startup.TldConfig execute 信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. Jul 02, 2018 6:46:11 PM org.apache.catalina.startup.HostConfig deployDirectory 信息: Deployment of web application directory /usr/local/apache-tomcat-7.0.88/webapps/manager has finished in 271 ms ```

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毕业5年，我问遍了身边的大佬，总结了他们的学习方法: 我问了身边10个大佬，总结了他们的学习方法，原来成功都是有迹可循的。

python爬取百部电影数据，我分析出了一个残酷的真相: 2019年就这么匆匆过去了，就在前几天国家电影局发布了2019年中国电影市场数据，数据显示去年总票房为642.66亿元，同比增长5.4%；国产电影总票房411.75亿元，同比增长8.65%，市场占比 64.07%；城市院线观影人次17.27亿，同比增长0.64%。看上去似乎是一片大好对不对？不过作为一名严谨求实的数据分析师，我从官方数据中看出了一点端倪：国产票房增幅都已经高达8.65%了，为什...

推荐10个堪称神器的学习网站: 每天都会收到很多读者的私信，问我：“二哥，有什么推荐的学习网站吗？最近很浮躁，手头的一些网站都看烦了，想看看二哥这里有什么新鲜货。” 今天一早做了个恶梦，梦到被老板辞退了。虽然说在我们公司，只有我辞退老板的份，没有老板辞退我这一说，但是还是被吓得 4 点多都起来了。（主要是因为我掌握着公司所有的核心源码，哈哈哈）既然 4 点多起来，就得好好利用起来。于是我就挑选了 10 个堪称神器的学习网站，推...

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阿里面试，面试官没想到一个ArrayList，我都能跟他扯半小时: 我是真的没想到，面试官会这样问我ArrayList。

曾经优秀的人，怎么就突然不优秀了。: 职场上有很多辛酸事，很多合伙人出局的故事，很多技术骨干被裁员的故事。说来模板都类似，曾经是名校毕业，曾经是优秀员工，曾经被领导表扬，曾经业绩突出，然而突然有一天，因为种种原因，被裁员了，...

大学四年因为知道了这32个网站，我成了别人眼中的大神！: 依稀记得，毕业那天，我们导员发给我毕业证的时候对我说“你可是咱们系的风云人物啊”，哎呀，别提当时多开心啦????，嗯，我们导员是所有导员中最帅的一个，真的???? 不过，导员说的是实话，很多人都叫我大神的，为啥，因为我知道这32个网站啊，你说强不强????，这次是绝对的干货，看好啦，走起来！ PS：每个网站都是学计算机混互联网必须知道的，真的牛杯，我就不过多介绍了，大家自行探索，觉得没用的，尽管留言吐槽吧???? 社...

良心推荐，我珍藏的一些Chrome插件: 上次搬家的时候，发了一个朋友圈，附带的照片中不小心暴露了自己的 Chrome 浏览器插件之多，于是就有小伙伴评论说分享一下我觉得还不错的浏览器插件。我下面就把我日常工作和学习中经常用到的一些 Chrome 浏览器插件分享给大家，随便一个都能提高你的“生活品质”和工作效率。 Markdown Here Markdown Here 可以让你更愉快的写邮件，由于支持 Markdown 直接转电子邮...

看完这篇HTTP，跟面试官扯皮就没问题了: 我是一名程序员，我的主要编程语言是 Java，我更是一名 Web 开发人员，所以我必须要了解 HTTP，所以本篇文章就来带你从 HTTP 入门到进阶，看完让你有一种恍然大悟、醍醐灌顶的感觉。最初在有网络之前，我们的电脑都是单机的，单机系统是孤立的，我还记得 05 年前那会儿家里有个电脑，想打电脑游戏还得两个人在一个电脑上玩儿，及其不方便。我就想为什么家里人不让上网，我的同学 xxx 家里有网，每...

史上最全的IDEA快捷键总结: 现在Idea成了主流开发工具，这篇博客对其使用的快捷键做了总结，希望对大家的开发工作有所帮助。

阿里程序员写了一个新手都写不出的低级bug，被骂惨了。: 这种新手都不会范的错，居然被一个工作好几年的小伙子写出来，差点被当场开除了。

谁是华为扫地僧？: 是的，华为也有扫地僧！2020年2月11-12日，“养在深闺人不知”的华为2012实验室扫地僧们，将在华为开发者大会2020（Cloud）上，和大家见面。到时，你可以和扫地僧们，吃一个洋...

AI 没让人类失业，搞 AI 的人先失业了: 最近和几个 AI 领域的大佬闲聊根据他们讲的消息和段子改编出下面这个故事如有雷同都是巧合 1. 老王创业失败，被限制高消费 “这里写我跑路的消息实在太夸张了。” 王葱葱哼笑一下，把消息分享给群里。阿杰也看了消息，笑了笑。在座几位也都笑了。王葱葱是个有名的人物，21岁那年以全额奖学金进入 KMU 攻读人工智能博士，累计发表论文 40 余篇，个人技术博客更是成为深度学习领域内风向标。 ...

2020年，冯唐49岁：我给20、30岁IT职场年轻人的建议: 点击“技术领导力”关注∆每天早上8:30推送作者|Mr.K 编辑| Emma 来源|技术领导力(ID：jishulingdaoli) 前天的推文《冯唐：职场人35岁以后，方法论比经验重要》，收到了不少读者的反馈，觉得挺受启发。其实，冯唐写了不少关于职场方面的文章，都挺不错的。可惜大家只记住了“春风十里不如你”、“如何避免成为油腻腻的中年人”等不那么正经的文章。本文整理了冯...

作为一名大学生，如何在B站上快乐的学习？: B站是个宝，谁用谁知道???? 作为一名大学生，你必须掌握的一项能力就是自学能力，很多看起来很牛X的人，你可以了解下，人家私底下一定是花大量的时间自学的，你可能会说，我也想学习啊，可是嘞，该学习啥嘞，不怕告诉你，互联网时代，最不缺的就是学习资源，最宝贵的是啥？你可能会说是时间，不，不是时间，而是你的注意力，懂了吧！那么，你说学习资源多，我咋不知道，那今天我就告诉你一个你必须知道的学习的地方，人称...

那些年，我们信了课本里的那些鬼话: 教材永远都是有错误的，从小学到大学，我们不断的学习了很多错误知识。斑羚飞渡在我们学习的很多小学课文里，有很多是错误文章，或者说是假课文。像《斑羚飞渡》：随着镰刀头羊的那声吼叫，整个斑羚群迅速分成两拨，老年斑羚为一拨，年轻斑羚为一拨。就在这时，我看见，从那拨老斑羚里走出一只公斑羚来。公斑羚朝那拨年轻斑羚示意性地咩了一声，一只半大的斑羚应声走了出来。一老一少走到伤心崖，后退了几步，突...

一个程序在计算机中是如何运行的？超级干货！！！: 强烈声明：本文很干，请自备茶水！???? 开门见山，咱不说废话！你有没有想过，你写的程序，是如何在计算机中运行的吗？比如我们搞Java的，肯定写过这段代码 public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } ...

【蘑菇街技术部年会】程序员与女神共舞，鼻血再次没止住。（文末内推）: 蘑菇街技术部的年会，别开生面，一样全是美女。

那个在阿里养猪的工程师，5年了……: 简介：在阿里，走过1825天，没有趴下，依旧斗志满满，被称为“五年陈”。他们会被授予一枚戒指，过程就叫做“授戒仪式”。今天，咱们听听阿里的那些“五年陈”们的故事。下一个五年，猪圈见！我就是那个在养猪场里敲代码的工程师，一年多前我和20位工程师去了四川的猪场，出发前总架构师慷慨激昂的说：同学们，中国的养猪产业将因为我们而改变。但到了猪场，发现根本不是那么回事：要个WIFI，没有；...

为什么程序猿都不愿意去外包？: 分享外包的组织架构，盈利模式，亲身经历，以及根据一些外包朋友的反馈，写了这篇文章，希望对正在找工作的老铁有所帮助

Java校招入职华为，半年后我跑路了: 何来我，一个双非本科弟弟，有幸在 19 届的秋招中得到前东家华为（以下简称 hw）的赏识，当时秋招签订就业协议，说是入了某 java bg，之后一系列组织架构调整原因等等让人无法理解的神操作，最终毕业前夕，被通知调往其他 bg 做嵌入式开发（纯 C 语言）。由于已至于校招末尾，之前拿到的其他 offer 又无法再收回，一时感到无力回天，只得默默接受。毕业后，直接入职开始了嵌入式苦旅，由于从未...

世界上有哪些代码量很少，但很牛逼很经典的算法或项目案例？: 点击上方蓝字设为星标下面开始今天的学习～今天分享四个代码量很少，但很牛逼很经典的算法或项目案例。1、no code 项目地址：https://github.com/kelseyhight...

Python全栈 Linux基础之3.Linux常用命令: Linux对文件（包括目录）有很多常用命令，可以加快开发效率：ls是列出当前目录下的文件列表，选项有-a、-l、-h，还可以使用通配符；c功能是跳转目录，可以使用相对路径和绝对路径；mkdir命令创建一个新的目录，有-p选项，rm删除文件或目录，有-f、-r选项；cp用于复制文件，有-i、-r选项，tree命令可以将目录结构显示出来（树状显示），有-d选项，mv用来移动文件/目录，有-i选项；cat查看文件内容，more分屏显示文件内容，grep搜索内容；>、>>将执行结果重定向到一个文件；|用于管道输出。

两年前不知如何编写代码的我，现在是一名人工智能工程师: 全文共3526字，预计学习时长11分钟图源：Unsplash 经常有小伙伴私信给小芯，我没有编程基础，不会写代码，如何进入AI行业呢？还能赶上AI浪潮吗？任何时候努力都不算晚。下面，小芯就给大家讲一个朋友的真实故事，希望能给那些处于迷茫与徘徊中的小伙伴们一丝启发。（下文以第一人称叙述）图源：Unsplash 正如Elsa所说，职业转换是...

强烈推荐10本程序员必读的书: 很遗憾，这个春节注定是刻骨铭心的，新型冠状病毒让每个人的神经都是紧绷的。那些处在武汉的白衣天使们，尤其值得我们的尊敬。而我们这些窝在家里的程序员，能不外出就不外出，就是对社会做出的最大的贡献。有些读者私下问我，窝了几天，有点颓丧，能否推荐几本书在家里看看。我花了一天的时间，挑选了 10 本我最喜欢的书，你可以挑选感兴趣的来读一读。读书不仅可以平复恐惧的压力，还可以对未来充满希望，毕竟苦难终将会...

非典逼出了淘宝和京东，新冠病毒能够逼出什么？: loonggg读完需要5分钟速读仅需 2 分钟大家好，我是你们的校长。我知道大家在家里都憋坏了，大家可能相对于封闭在家里“坐月子”，更希望能够早日上班。今天我带着大家换个思路来聊一个问题...

牛逼！一行代码居然能解决这么多曾经困扰我半天的算法题: 春节假期这么长，干啥最好？当然是折腾一些算法题了，下面给大家讲几道一行代码就能解决的算法题，当然，我相信这些算法题你都做过，不过就算做过，也是可以看一看滴，毕竟，你当初大概率不是一行代码解决的。学会了一行代码解决，以后遇到面试官问起的话，就可以装逼了。一、2 的幂次方问题描述：判断一个整数 n 是否为 2 的幂次方对于这道题，常规操作是不断这把这个数除以 2，然后判断是否有余数，直到 ...

Spring框架|JdbcTemplate介绍: 文章目录一、JdbcTemplate 概述二、创建对象的源码分析三、JdbcTemplate操作数据库一、JdbcTemplate 概述在之前的web学习中，学习了手动封装JDBCtemplate，其好处是通过(sql语句+参数)模板化了编程。而真正的JDBCtemplete类，是Spring框架为我们写好的。它是 Spring 框架中提供的一个对象，是对原始 Jdbc API 对象的简单...

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