问什么这个方法没有执行？？自己看不出来,请教高手？？

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title> </head> <body>
<h1>
欢迎访问学生管理系统
</h1>
<a href="login.do">点击进入</a> </body>
</html>package dao;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;import bean.bean;public class Conndb {
public static Connection getConn() {
Connection conn = null; String userName = "root"; String userPasswd = "root"; String dbName = "studebt"; String url = "jdbc:mysql://localhost/" + dbName + "?user=" + userName
+ "&password=" + userPasswd;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(url);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
} public static List getList() {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "select * from student";
List list = new ArrayList();
try {
conn = getConn();
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
bean b = new bean();
b.setSname(rs.getString("sname"));
b.setSage(rs.getString("sage"));
list.add(b); }
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
close(rs, ps, conn); }
return list;
} public static void add(String sname,String sage) {

Connection conn = null;
PreparedStatement ps = null;
String sql ="insert into student(sname,sage) values(?,?)" ;
try {
conn = getConn();
ps = conn.prepareStatement(sql);
ps.setString(1, sname);
ps.setString(2, sage);
ps.executeUpdate();
} catch (SQLException e) {
System.out.println("添加学生异常");
e.printStackTrace();
}
finally{
try {
ps.close();
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
} public static void close(ResultSet rs, PreparedStatement ps, Connection conn) {
try {
if (rs != null) {
rs.close();
rs = null; }
if (ps != null) {
ps.close();
ps = null; }
if (conn != null) {
conn.close();
conn = null; }
} catch (SQLException e) {
System.out.println("关闭发生异常");
e.printStackTrace();
} }}

解决方案 »

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package Action;import java.util.List;
import ActionForm.studentActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;import dao.Conndb;public class strutsAction extends MappingDispatchAction { public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
List list = Conndb.getList();
request.setAttribute("list", list);
System.out.println("2222222222222222222222222");
return mapping.findForward("list");
} public ActionForward add(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
studentActionForm s = (studentActionForm) form;
String sname = s.getSname();
String sage = s.getSage();
Conndb.add(sname, sage);
System.out.println("111111111111111111111111111111111111111111111");
return mapping.findForward("list");
}
}
package ActionForm;import org.apache.struts.action.ActionForm;public class studentActionForm extends ActionForm { private static final long serialVersionUID = 6843681866968519074L; private String sname; private String sage; public String getSage() {
return sage;
} public void setSage(String sage) {
this.sage = sage;
} public String getSname() {
return sname;
} public void setSname(String sname) {
this.sname = sname;
}}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"><struts-config>
  <data-sources />
  <form-beans >
  <form-bean name="StudentForm" type="ActionForm.studentActionForm"/>
  </form-beans>
  <global-exceptions />
  <global-forwards />
  <action-mappings >
<action path="/login"
type="Action.strutsAction"
parameter="execute"
>
<forward name="list" path="/list.jsp"/>
</action>
<action path="/loginadd"
type="Action.strutsAction"
parameter="add"
name="StudentForm"
scope="request"
>
<forward name="list" path="/list.jsp"/>
</action>
  </action-mappings>
  <message-resources parameter="com.yourcompany.struts.ApplicationResources"/>
</struts-config>
list.jsp<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@  taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>


    <title>My JSP 'list.jsp' starting page</title>

  </head>

  <body>
  <form action="add.jsp" method="post">
  <input type="submit" value="添加学生" /><p>
  </form>
   <table border="1">
   <tr>
   <td>姓名</td>
   <td>年龄</td>
   </tr>
   <c:forEach items="${list}" var="s">
   <tr>
   <td>${s.sname }</td>
   <td>${s.sage }</td>
   </tr>
   </c:forEach>
   </table>
  </body>
</html>add.jsp<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>


    <title>添加学生</title>

  </head>

  <body>
    <form action="loginadd.do">
    学生姓名:<input type="text" name="sname" /><br>
    学生年龄:<input type="text"  name="sage"/><br>
    <input type="submit" value="添加"/>
    </form>
  </body>
</html>
问题就是在   public ActionForward add(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        studentActionForm s = (studentActionForm) form;
        String sname = s.getSname();
        String sage = s.getSage();
        Conndb.add(sname, sage);
        System.out.println("111111111111111111111111111111111111111111111");
        return mapping.findForward("list");
    }
这个方法就是不执行打印不出来
<message-resources parameter="com.yourcompany.struts.ApplicationResources"/>
是配置Struct标签国际化不？
<action path="/loginadd"
type="Action.strutsAction"
parameter="add"你把配置文件改成
<action path="/loginadd"
type="Action.strutsAction"
parameter="method"把 <form action="loginadd.do">
改成<form action="loginadd.do?method=add">看看
改了可是还是不行啊究竟是什么问题呢  它已经跳转到list.jsp了就是不执行那个添加方法
你能确定他没有执行添加方法，还是已经执行，只是表单传过来的是空值，你可以打印snam,sage;看看
谢谢，现在已经好了可是为什么当我添加完数据后返回到list.jsp只显示姓名和成绩这个字样下面没有数据呢？查看数据库确已经添加进去了
  public ActionForward add(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        studentActionForm s = (studentActionForm) form;
        String sname = s.getSname();
        String sage = s.getSage();
        Conndb.add(sname, sage);
        System.out.println("111111111111111111111111111111111111111111111");
        return mapping.findForward("list");
    }
这个方法不是ActionServlet里的方法它怎么去执行呢？
数据库添加进去了不代表页面就可以显示了，他添加进去，你要把它查询出来，然后再action中set进一个对象里面，然后再页面上去出来显示，你都没有设置数据不会凭空显示到页面上去。建议你在好好学习一下教程，或者下载一些可运行的源码，参照一下。现在网上的例子多如牛毛，先仿照一下把原理搞懂再说。