Question

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。 This one特别有用，因为它指向官方tomcat documentation，特别是this section。

简而言之：提供的解决方案：tomcat需要将jdbc数据库驱动程序复制到$CATALINA_HOME/lib，因为它不会在WEB-INF/lib/下找到它们。好吧，但它仍然不适合我，我正在变得疯狂。

让我们看看你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（CATALINA_BASE）创建了一个特定于WTP的目录，所以我也在那里复制了mysql-connector（我在mysql-conector.jar中尝试CATALINA_HOME未成功{1}}，CATALINA_BASE及其中的{1}}：

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，所以我没想到会有什么不同，但我试过，以防万一。

我的spring数据源定义非常简单：

  <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，我收到以下错误：

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

还有一个提示：使用Sysinternals Process Explorer我可以看到Tomcat正在打开mysql-connector-java.jar：

"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 @ Process Explorer

还有什么想法？

EDIT1：我尝试使用Oracle，但它确实有效！

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>

我为mysql做错了什么？

Answer 1

解决！

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.jar文件，但无法加载。 Tomcat只展示了例外的第一级：

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

但是当我使用Class.forName（“com.mysql.jdbc.Driver”）编写一个非常简单的helloworld时，会显示以下错误：

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文件表明它可以打开......但是有一些错误。

再次下载驱动程序确实解决了问题。

为自己投票： - （

Answer 2

简而言之：提供的解决方案：tomcat需要将jdbc数据库驱动程序复制到$CATALINA_HOME/lib/，因为它不会在WEB-INF/lib/下找到它们。好吧，但它仍然不适合我，我正在变得疯狂。

这取决于您加载驱动程序的方式。

如果在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）都应该有效。

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$CATALINA_HOME/lib/中的文件的行为如何，所以我会尝试将这些文件放在你的应用程序WEB-INF/lib/文件夹中

tomcat7：无法加载JDBC驱动程序类[com.mysql.jdbc.Driver]

2 个答案: