Error 500-Internal Server Error

Error 500--Internal Server Error
Error 500--Internal Server Error

java.lang.NullPointerException
 at bo.LoginBo.verifyUser(LoginBo.java:37)
 at struts.action.LoginAction.getActionForward(LoginAction.java:35)
 at struts.action.LoginAction.execute(LoginAction.java:20)
 at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
 at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
 at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
 at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
 at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
 at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
 at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6350)
 at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
 at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
 at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
 at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
 at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
 at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)

[解决办法]
空指针错误。没代码，无法判断具体

在 LoginBo.java 的第37行 verifyUser 方法