13

我在stackoverflow上看到了几个类似的问题，但它们并没有解决我的问题。这个特别有用，因为它指向官方的tomcat 文档 ，特别是本节。

简而言之，那里提供的解决方案是：tomcat 需要将 jdbc 数据库驱动程序复制$CATALINA_HOME/lib到WEB-INF/lib/. 好的，但它仍然对我不起作用，我变得很生气。

让我们看看您是否可以提供任何进一步的想法。

环境是Windows XP、Tomcat7、Eclipse Indigo、Java6 和 Spring3。

mysql-connector已复制到$CATALINA_HOME/lib

C:\>dir "c:\Program Files\Apache-Tomcat-7.0.12\lib"\mysql*
[...]
/2012  13:39           877.094 mysql-connector-java-5.1.21.jar
[...]
C:\>

您可能知道 Eclipse 的 Tomcat 集成为其部署创建了一个特定于WTP的目录CATALINA_BASE（mysql-conector.jarCATALINA_HOMECATALINA_BASE

C:\>dir c:\Share\genesis\wsEclipse-indigo\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\lib
[...]
29/08/2012  13:39           877.094 mysql-connector-java-5.1.21.jar
[...]
C:\>

据我了解 Tomcat 的 catalina.properties 文件，它们都被添加到类路径中，所以我没想到有任何区别，但我尝试了，以防万一。

我的spring数据源定义很简单：

  <bean id="securityDataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/venus" />
    <property name="username" value="root" />
    <property name="password" value="" />
  </bean>

但是当我重新启动tomcat时，出现以下错误：

ERROR: org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityDataSource' defined in ServletContext resource [/WEB-INF/spring/root-context.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1396)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4701)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5204)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5199)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:102)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1393)
    ... 21 more
30-ago-2012 8:38:11 org.apache.catalina.core.StandardContext listenerStart
GRAVE: Excepción enviando evento inicializado de contexto a instancia de escuchador de clase org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityDataSource' defined in ServletContext resource [/WEB-INF/spring/root-context.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1396)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4701)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5204)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5199)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:102)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1393)
    ... 21 more

另一个提示：使用 Sysinternals Process Explorer 我可以看到mysql-connector-java.jarTomcat 正在打开：

"C:\Program Files\Java\jre6\bin\javaw.exe" -Dcatalina.base=C:\Share\genesis\wsEclipse-indigo\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 "-Dcatalina.home=C:\Program Files\Apache-Tomcat-7.0.12" -Dwtp.deploy=C:\Share\genesis\wsEclipse-indigo\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps "-Djava.endorsed.dirs=C:\Program Files\Apache-Tomcat-7.0.12\endorsed" -Dfile.encoding=Cp1252 -classpath "C:\Program Files\Apache-Tomcat-7.0.12\bin\bootstrap.jar;C:\Program Files\Apache-Tomcat-7.0.12\bin\tomcat-juli.jar" org.apache.catalina.startup.Bootstrap start

Tomcat@进程资源管理器

还有什么想法吗？

EDIT1：我尝试使用 Oracle 并且它有效！

C:\>dir "c:\Program Files\Apache-Tomcat-7.0.12\lib"\oci*
[...]
02/10/2006  22:36         1.545.954 ocijdbc10.jar
[...]
C:\>

数据源：

  <bean id="securityDataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
    <property name="url" value="jdbc:oracle:oci:@BARVDB002D:1545:TFSDB0" />
    <property name="username" value="me" />
    <property name="password" value="qwerty" />
  </bean>

我对mysql做错了什么？

4

2 回答 2

11

解决了！

Arturs Licis 的建议是关键。不知何故，mysql驱动程序被错误地下载了。它似乎是一个 .jar 文件，但无法加载。Tomcat 只显示了第一级异常：

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
[...]

但是当我用 Class.forName("com.mysql.jdbc.Driver") 编写一个非常简单的 helloworld 时，却显示了以下错误：

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
[...]
Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)
[...]

尤里卡！在 WinRar 上打开 .jar 文件显示它可以打开...但有一些错误。

再次下载驱动程序确实解决了问题。

为我自己投反对票:-(

于 2012-08-31T12:34:14.957 回答
3

简而言之，那里提供的解决方案是：tomcat 需要将 jdbc 数据库驱动程序复制$CATALINA_HOME/lib/到WEB-INF/lib/. 好的，但它仍然对我不起作用，我变得很生气。

这取决于您如何加载驱动程序。

如果您在 tomcat 中配置驱动程序并将其提供给应用程序，则此语句是正确的。

但是您直接在应用程序中加载驱动程序。然后两种方式，$CATALINA_HOME/lib/（在tomcat中）以及WEB-INF/lib/（在应用程序中）都应该工作。

但是 Spring 使用一种特殊的方式来加载该类Class.forName(driverClassNameToUse, true, ClassUtils.getDefaultClassLoader())，我不知道它对文件的行为，$CATALINA_HOME/lib/所以我会尝试将文件放在你的应用程序WEB-INF/lib/文件夹中

于 2012-08-30T09:09:09.103 回答