学习jsp+dao，数据库连接出问题，数据插入不成功，大家能帮我看看什么原因吗
HTTP Status 500 -
--------------------------------------------
type Exception report
message
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 /dao/daodemo01.jsp at line 26
23: PersonDAO dao=new PersonDAOImpl();
24: //try
25: //{
26: dao.insert(person);
27: //dao.update(person);
28: //Person per=dao.queryById("MLDN");
29:
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
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:722)
root cause
javax.servlet.ServletException: java.lang.Exception: 操作出现异常
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:911)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:840)
org.apache.jsp.dao.daodemo01_jsp._jspService(daodemo01_jsp.java:105)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
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:722)
root cause
java.lang.Exception: 操作出现异常
cn.mldn.lxh.dao.impl.PersonDAOImpl.insert(PersonDAOImpl.java:35)
org.apache.jsp.dao.daodemo01_jsp._jspService(daodemo01_jsp.java:90)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
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:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.25 logs.
[解决办法]
cn.mldn.lxh.dao.impl.PersonDAOImpl.insert(PersonDAOImpl.java:35)
看一下这一行。
[解决办法]
throw new Exception("操作出现异常") ;
把这行改成e.printStackTrace();
明显就是try里面出错了。
错误被你隐藏了，在打印看看。
pstmt.close() ;这个放到finally中
检查属性类型是否匹配。
[解决办法]
