MAVEN+SPRING+MYBATIS整合常见问题
2014-02-20 15:25
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最近在研究J2EE开发，中间碰到不少问题，于是写下此文，用于记录这个过程，并为其他与我一样在路上的朋友提供参考，随着时间的推移，此文将不断补充完善
通过Server视图启动TOMCAT提示错误：java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
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)
造成问题的原因至今不明确，我是用STS进行开发，原想将项目拆成多个MAVEN项目，总有点问题后暂时放弃又合起来了，之后就一直这样，什么CLEAN啊之类的操作都试过，一直没有解决。
从这错误的现象来看是因为找不到org.springframework.web.context.ContextLoaderListener这个类，这个类在WEB.XML配置引用。
碰到这个问题我首先想是不是因为中间折腾过几次项目，造成了编译的问题，于是执行MAVEN CLEAN，然后MAVEN INSTALL，再把SERVER删除重新来，但是问题依旧。于是我又新建一个全新项目发布到TOMCAT，一切正常，操作时发现有一个特点，如下图：
[align=left] [/align]
图1
图中myproject是我出问题的项目，mytest1是我新建的测试项目，新建的项目在添加发布时多一个spring-web的JAR包依赖，于是我打开两个项止的.classpath，发现出问题的项目少了一句话
正常的项目如下
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
<attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
</attributes>
</classpathentry>
问题项目如下
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
于是把<attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>给加上，进入开STS刷新，然后再进入到图1界面，这下myproject也有了spring-web引用了。
按正常的发布流程发布，一切正常。
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [spring-mybatis.xml]: Invocation of init method failed; nested exception is java.sql.SQLException: oracle.jdbc.driver.OracleDriver
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1486)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:323)
... 53 more
Caused by: java.sql.SQLException: oracle.jdbc.driver.OracleDriver
at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:500)
at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:382)
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:601)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1483)
... 60 more
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:494)
... 68 more
笔者在做一个MAVEN+SPRING+MYBATIS+ORACLE整合时碰到这个问题，单元测试SERVICE一切正常，但是发布到TOMCAT7时出现这个错误。
从这个错误的现象来看是ORACLE驱动的OJDBC没有一起发布，我原来在POM.XML文件是这么写的
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/ojdbc6.jar</systemPath>
</dependency>
其实这个问题非常明显，原因就是通过这样SYSTEMPATH方式引用造成的，其实MAVEN可以引用本地JAR包，但需要自己去单独发布，为了省事，你也可以将JAR包导入到本地库中，方法是在MAVEN的BIN目录下用命令行执行如下语句
mvn install:install-file -Dfile=E:\J2EE\jar\ojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11 -Dpackaging=jar
具体的参数内容根据自己的情况修改，执行完之后再将POM.xml中的配置改成如下内容
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11</version>
</dependency>
至此问题解决。
Invalid classpath publish/export dependency org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7. The associated classpath container cannot be included in the published/exported module.portal-webP/portal-webClasspath
Dependency Validator Message
这个问题的出现是因今天在建立MAVEN多模块项目，中间用过一次MAVEN -->Update projects ...的操作，然后就出现。
出现这个错误后如果仍然发布，启动TOMCAT也将如下错误
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
仔细一看跟本文的第一个问题的症状非常相似，参照第一个问题的方式未能解决。随后我拿着一个正常的MAVEN项目打开项目属性界面，发现出问题的项目有一处配置不对，通过修改改成正常项目一样问题解决，具体的修改步骤如下：
在项目中点右键，再选择Properties
选择如上图的选项，再点击ADD按钮
选择Java Build Path Entries
选择唯一的MAVEN选项，完成
完成后的结果如上图，其中我这有一个portal-core的MAVEN MODULE依赖，这个你不会有的，依照上面的步骤处理完毕问题解决。
Javascript检测错误
当项目引入JQuery-x.x.x.min.js后Markers窗口总是提示一语法错误之类的东西，虽然不影响整个开发，但是看久了也烦。对于这种东西你是没办法修正的，要处理只能把Javascript的检测功能给关掉，关闭方法如下：
项目上右键 - Properties - Builders -JavaScript Validator去掉勾即可解决
Removing obsolete files from server...
Could not clean server of obsolete files: null
java.lang.NullPointerException
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[INFO] Scanning for projects...
[ERROR] The build could not read 2 projects -> [Help 1]
[ERROR]
[ERROR] The project net.ntrue:portal-web:2.0.0 (E:\ntrue\platform\portal\portal-web\pom.xml) has 1 error
[ERROR] Non-parseable POM C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom: Expected root element 'project' but found 'html' (position: START_TAG seen \n<html>... @2:7) @ C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom,
line 2, column 7 -> [Help 2]
[ERROR]
[ERROR] The project net.ntrue:portal-core:2.0.0 (E:\ntrue\platform\portal\portal-core\pom.xml) has 1 error
[ERROR] Non-parseable POM C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom: Expected root element 'project' but found 'html' (position: START_TAG seen \n<html>... @2:7) @ C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom,
line 2, column 7 -> [Help 2]
[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/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/ModelParseException
这是在编写完代码准备启动TOMCAT调试时出现的错误，具体原因可能是因为我手工修改过TOMCAT下的配置文件，找了好久但没有明确到底是哪个项修改造成的，后通过删除TOMCAT目录，然后重新添加SERVER解决问题。
运行maven test时提示Failed tests: myproject.TestXXXController.testList(): org/junit/Assert
打开项目TARGET目录下的XML报告发现错误原因如下
java.lang.NoClassDefFoundError: org/junit/Assert
at net.ntrue.framework.test.JControllerBase.executeAction(JControllerBase.java:97)
at net.ntrue.portal.controller.TestBrandController.testList(TestBrandController.java:13)
Caused by: java.lang.ClassNotFoundException: org.junit.Assert
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 20 more
要说清这个问题得从MAVEN多项目的结构开始，我的项目结果是这样的
|-Framework 公共类库，独立的maven 项目，有两个用于测试用的抽象基类
|-portal
|-portal-parent 一个MAVEN的PARENT项目，本身没有程序逻辑，只负责公共的POM依赖定义，junit的依赖声明也在这里
|-portal-web 纯WEB的JSP页面
|-portal-core WEB类除JSP之外的都在这里，内部几乎所有的类都有单元测试，包括SERVICE和CONTROLLER
在portal-core运行maven test时几乎所有的测试用例均错误，后猜测可能的原因是因为加入了framework的引用，而framework里将junit声明为test
后将junit的声明由portal-parent中移到portal-core项目的POM.XML中问题解决，具体原因暂没了解透
修改后的portal-core项目POM.XML内容如下
<dependencies>
<dependency>
<groupId>net.ntrue</groupId>
<artifactId>framework</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
Spring MVC JSON请求异常
异常的内容有两段，当使用了@RequestBody时提示如下错误
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.readWithMessageConverters(HandlerMethodInvoker.java:645)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveRequestBody(HandlerMethodInvoker.java:605)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:354)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:439)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:427)
at net.ntrue.framework.test.JControllerBase.excuteAction(JControllerBase.java:74)
at net.ntrue.portal.webservice.TestService.TestJsonWrite(TestService.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
使用@ResponseBody时反馈以下错误
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:1054)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:994)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:943)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:427)
at net.ntrue.framework.test.JControllerBase.excuteAction(JControllerBase.java:74)
at net.ntrue.portal.webservice.TestService.TestJsonWrite(TestService.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
从这两段错误可以很明显看出是不知道该用哪个CONVERT类去处理请求和响应的数据，之前认真研究过SPRING MVC，其实SPRING MVC处理这种JSON格式的传参和返回是非常简单的，按照书上和网上的方法尝试几次仍未解决，偶然发现是因为SPRING MVC的配置文件上对于org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter这个BEAN的描述重复了，其中一个未添加MappingJacksonHttpMessageConverter的引用
错误时的XML配置如下
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json; charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean id="AnnotationMethodHandlerAdapter"
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
</bean>
<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
去掉中间的
<bean id="AnnotationMethodHandlerAdapter"
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
</bean>
之后一切正常
通过Server视图启动TOMCAT提示错误：java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
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)
造成问题的原因至今不明确，我是用STS进行开发，原想将项目拆成多个MAVEN项目，总有点问题后暂时放弃又合起来了，之后就一直这样，什么CLEAN啊之类的操作都试过，一直没有解决。
从这错误的现象来看是因为找不到org.springframework.web.context.ContextLoaderListener这个类，这个类在WEB.XML配置引用。
碰到这个问题我首先想是不是因为中间折腾过几次项目，造成了编译的问题，于是执行MAVEN CLEAN，然后MAVEN INSTALL，再把SERVER删除重新来，但是问题依旧。于是我又新建一个全新项目发布到TOMCAT，一切正常，操作时发现有一个特点，如下图：
[align=left] [/align]
图1
图中myproject是我出问题的项目，mytest1是我新建的测试项目，新建的项目在添加发布时多一个spring-web的JAR包依赖，于是我打开两个项止的.classpath，发现出问题的项目少了一句话
正常的项目如下
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
<attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
</attributes>
</classpathentry>
问题项目如下
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
于是把<attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>给加上，进入开STS刷新，然后再进入到图1界面，这下myproject也有了spring-web引用了。
按正常的发布流程发布，一切正常。
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [spring-mybatis.xml]: Invocation of init method failed; nested exception is java.sql.SQLException: oracle.jdbc.driver.OracleDriver
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1486)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:323)
... 53 more
Caused by: java.sql.SQLException: oracle.jdbc.driver.OracleDriver
at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:500)
at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:382)
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:601)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1483)
... 60 more
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:494)
... 68 more
笔者在做一个MAVEN+SPRING+MYBATIS+ORACLE整合时碰到这个问题，单元测试SERVICE一切正常，但是发布到TOMCAT7时出现这个错误。
从这个错误的现象来看是ORACLE驱动的OJDBC没有一起发布，我原来在POM.XML文件是这么写的
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/ojdbc6.jar</systemPath>
</dependency>
其实这个问题非常明显，原因就是通过这样SYSTEMPATH方式引用造成的，其实MAVEN可以引用本地JAR包，但需要自己去单独发布，为了省事，你也可以将JAR包导入到本地库中，方法是在MAVEN的BIN目录下用命令行执行如下语句
mvn install:install-file -Dfile=E:\J2EE\jar\ojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11 -Dpackaging=jar
具体的参数内容根据自己的情况修改，执行完之后再将POM.xml中的配置改成如下内容
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11</version>
</dependency>
至此问题解决。
Invalid classpath publish/export dependency org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7. The associated classpath container cannot be included in the published/exported module.portal-webP/portal-webClasspath
Dependency Validator Message
这个问题的出现是因今天在建立MAVEN多模块项目，中间用过一次MAVEN -->Update projects ...的操作，然后就出现。
出现这个错误后如果仍然发布，启动TOMCAT也将如下错误
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
仔细一看跟本文的第一个问题的症状非常相似，参照第一个问题的方式未能解决。随后我拿着一个正常的MAVEN项目打开项目属性界面，发现出问题的项目有一处配置不对，通过修改改成正常项目一样问题解决，具体的修改步骤如下：
在项目中点右键，再选择Properties
选择如上图的选项，再点击ADD按钮
选择Java Build Path Entries
选择唯一的MAVEN选项，完成
完成后的结果如上图，其中我这有一个portal-core的MAVEN MODULE依赖，这个你不会有的，依照上面的步骤处理完毕问题解决。
Javascript检测错误
当项目引入JQuery-x.x.x.min.js后Markers窗口总是提示一语法错误之类的东西，虽然不影响整个开发，但是看久了也烦。对于这种东西你是没办法修正的，要处理只能把Javascript的检测功能给关掉，关闭方法如下：
项目上右键 - Properties - Builders -JavaScript Validator去掉勾即可解决
Removing obsolete files from server...
Could not clean server of obsolete files: null
java.lang.NullPointerException
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[INFO] Scanning for projects...
[ERROR] The build could not read 2 projects -> [Help 1]
[ERROR]
[ERROR] The project net.ntrue:portal-web:2.0.0 (E:\ntrue\platform\portal\portal-web\pom.xml) has 1 error
[ERROR] Non-parseable POM C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom: Expected root element 'project' but found 'html' (position: START_TAG seen \n<html>... @2:7) @ C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom,
line 2, column 7 -> [Help 2]
[ERROR]
[ERROR] The project net.ntrue:portal-core:2.0.0 (E:\ntrue\platform\portal\portal-core\pom.xml) has 1 error
[ERROR] Non-parseable POM C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom: Expected root element 'project' but found 'html' (position: START_TAG seen \n<html>... @2:7) @ C:\Users\Administrator\.m2\repository\net\ntrue\portal\2.0.0\portal-2.0.0.pom,
line 2, column 7 -> [Help 2]
[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/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/ModelParseException
这是在编写完代码准备启动TOMCAT调试时出现的错误，具体原因可能是因为我手工修改过TOMCAT下的配置文件，找了好久但没有明确到底是哪个项修改造成的，后通过删除TOMCAT目录，然后重新添加SERVER解决问题。
运行maven test时提示Failed tests: myproject.TestXXXController.testList(): org/junit/Assert
打开项目TARGET目录下的XML报告发现错误原因如下
java.lang.NoClassDefFoundError: org/junit/Assert
at net.ntrue.framework.test.JControllerBase.executeAction(JControllerBase.java:97)
at net.ntrue.portal.controller.TestBrandController.testList(TestBrandController.java:13)
Caused by: java.lang.ClassNotFoundException: org.junit.Assert
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 20 more
要说清这个问题得从MAVEN多项目的结构开始，我的项目结果是这样的
|-Framework 公共类库，独立的maven 项目，有两个用于测试用的抽象基类
|-portal
|-portal-parent 一个MAVEN的PARENT项目，本身没有程序逻辑，只负责公共的POM依赖定义，junit的依赖声明也在这里
|-portal-web 纯WEB的JSP页面
|-portal-core WEB类除JSP之外的都在这里，内部几乎所有的类都有单元测试，包括SERVICE和CONTROLLER
在portal-core运行maven test时几乎所有的测试用例均错误，后猜测可能的原因是因为加入了framework的引用，而framework里将junit声明为test
后将junit的声明由portal-parent中移到portal-core项目的POM.XML中问题解决，具体原因暂没了解透
修改后的portal-core项目POM.XML内容如下
<dependencies>
<dependency>
<groupId>net.ntrue</groupId>
<artifactId>framework</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
Spring MVC JSON请求异常
异常的内容有两段，当使用了@RequestBody时提示如下错误
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.readWithMessageConverters(HandlerMethodInvoker.java:645)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveRequestBody(HandlerMethodInvoker.java:605)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:354)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:439)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:427)
at net.ntrue.framework.test.JControllerBase.excuteAction(JControllerBase.java:74)
at net.ntrue.portal.webservice.TestService.TestJsonWrite(TestService.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
使用@ResponseBody时反馈以下错误
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:1054)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:994)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:943)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:427)
at net.ntrue.framework.test.JControllerBase.excuteAction(JControllerBase.java:74)
at net.ntrue.portal.webservice.TestService.TestJsonWrite(TestService.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
从这两段错误可以很明显看出是不知道该用哪个CONVERT类去处理请求和响应的数据，之前认真研究过SPRING MVC，其实SPRING MVC处理这种JSON格式的传参和返回是非常简单的，按照书上和网上的方法尝试几次仍未解决，偶然发现是因为SPRING MVC的配置文件上对于org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter这个BEAN的描述重复了，其中一个未添加MappingJacksonHttpMessageConverter的引用
错误时的XML配置如下
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json; charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean id="AnnotationMethodHandlerAdapter"
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
</bean>
<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
去掉中间的
<bean id="AnnotationMethodHandlerAdapter"
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
</bean>
之后一切正常
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