急：错在什么地方？在线等待，先来者多给分！

Question

在WEB-INF\classes下建立conn_sql_pack目录，把conn.class放到里面。就可以了

Answer 1

接elapsed(Maverick)，必须要把系统默认的class路径指向WEB-INF\classes

Answer 2

我照 elapsed(Maverick）的做了还是一样的错，
 hazeline说的我就不明的了！我是新手能不能说细一点

Answer 3

注：把examples这个文件copy一个，放在webapps里面，修改一个名字，例如，叫做www，在www里面建立WEB-INF目录，在WEB-INF目录里面建立个web.xml文件，在examples\WEB-INF下把web.xml文件copy进去，然后，用文本打开，在<web-app>下面加上
<context-param>
<param-name>Home</param-name> 
   <param-value>$tomcat\webapps\www</param-value> 
</context-param>

Answer 4

谢谢！elapsed(Maverick) 分先欠你，老的问题解决了新的又来了
提示如下Error: 500
Location: /test.jsp
Internal Servlet Error:javax.servlet.ServletException
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:460)
at test_1._jspService(test_1.java:105)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Ajp13Interceptor.java:341)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)
Root cause:
java.lang.NullPointerException
at test_1._jspService(test_1.java:94)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Ajp13Interceptor.java:341)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Thread.java:536)