HTTP Status 500 - An exception occurred processing JSP page /test/selectlastid.jsp at line 36
type Exception report
message An exception occurred processing JSP page /test/selectlastid.jsp at line 36
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /test/selectlastid.jsp at line 36
33: out.print(e);
34: }
35:
36: cdb.getRs().last();
37:
38: %>
39: <table>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.NullPointerException
org.apache.jsp.test.selectlastid_jsp._jspService(selectlastid_jsp.java:110)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.54 logs.
Apache Tomcat/7.0.54
------解决方案--------------------
检查下cdb是不是空的
------解决方案--------------------
cdb. 为null 或者 getRs() 为null
------解决方案--------------------
cdb
cdb.getRs() 这两个有一个是 NULL
------解决方案--------------------
page /test/selectlastid.jsp at line 36
cdb.getRs().last();
java.lang.NullPointerException
cdb 或 cbd.getRs() 为空，判空后再使用
------解决方案--------------------
cdb.getRs().last();
这句
或者cdb为null，或者cdb.getRs()为null，你自己判断下！
------解决方案--------------------
空指针啊
其他代码都没有，肯定就是cdb为null，或者cdb.getRs()为null嘛