请教 500错误解决方法

Question

 WARN [http-8080-2] (Configurator.java:126) - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/C:/Tomcat%206.0/webapps/oas/WEB-INF/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
 INFO [http-8080-2] (SessionFactoryObjectFactory.java:82) - Not binding factory to JNDI, no JNDI name configured
 WARN [http-8080-2] (JDBCExceptionReporter.java:71) - SQL Error: 0, SQLState: null
ERROR [http-8080-2] (JDBCExceptionReporter.java:72) - Cannot load JDBC driver class 'com.microsoft.jdbc.sqlserver.SQLServerDriver'
2010-6-22 16:25:51 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
java.lang.NullPointerException
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:384)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
at java.lang.Thread.run(Thread.java:619)
lost current session count=0请教一下这是什么错误，有什么引起的？

Answer 1

Cannot load JDBC driver class 'com.microsoft.jdbc.sqlserver.SQLServerDriver'
连接不上数据库No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/C:/Tomcat%206.0/webapps/oas/WEB-INF/lib/ehcache-1.1.jar!/ehcache-failsafe.xml检查下你的配置文件是否写对了。。

Answer 2

Cannot load JDBC driver class 'com.microsoft.jdbc.sqlserver.SQLServerDriver'你加载驱动包了么？

Answer 3

Not binding factory to JNDI, no JNDI name configured  你的数据库连接池是在tomcat中配置的吧
jndi的名称不对。仔细看下tomcat中的server.xml文件中配置数据库的那一段。保证这里的属性名和你调用数据库连接的属性一致

Answer 4

[Quote=引用 8 楼 shineboyadh 的回复:]空指针呢，贴代码看看

Answer 5

java.lang.NullPointerException
最好的方法还是Debug