struts2做了个简单的登录注册，jdbc链接数据库

[size=small][color=red]这个登录注册做了能有3天吧，遇到了几个问题，耽误了些时间。现在把问题记下来，防止以后忘掉。也希望对大家有所帮助吧。代码如下：[/color][/size]


[color=brown][size=large]struts.xml[/size][/color]

        "http://struts.apache.org/dtds/struts-2.0.dtd">


    
        
            /result.jsp
            /result.jsp
        
    

[color=brown][size=large]web.xml[/size][/color]

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    struts2
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter


    struts2
    /*

[color=brown][size=large]login.jsp[/size][/color]

<%@ page language="java" contentType="text/html; charset=GB2312" pageEncoding="GB2312" %>
<%@ taglib uri="/struts-tags" prefix="s" %>








    
    
    
    
    

[color=brown][size=large]result.jsp[/size][/color]

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>


  
    
  
  
    
${result}
  

[color=brown][size=large]LoginAction.java[/size][/color]

package com.struts.action;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.opensymphony.xwork2.ActionSupport;
import com.struts.service.LoginService;

@SuppressWarnings("serial")
public class LoginAction extends ActionSupport implements ServletRequestAware {

	// 用户名
	private String userName;

	// 用户密码
	private String password;

	// Service
	private LoginService service = new LoginService();

	// 获得HttpServletRequest对象
	private javax.servlet.http.HttpServletRequest request;

	public void setServletRequest(HttpServletRequest request) {
		this.request = request;
	}

	/**
	 * 登录
	 * @return
	 */
	public String login() throws Exception {

		// 登录用户check
		boolean flg = service.userLogin(userName, password);

		if (flg) {

			request.setAttribute("result", "成功保存[" + "登录成功" + "]");

			return "login";
		}

		request.setAttribute("result", "成功保存[" + "登录失败" + "]");

		return "login";
	}

	/**
	 * 注册
	 * @return
	 */
	public String regist() throws Exception {

		// 用户注册
		boolean flg = service.userRegist(userName, password);

		if (flg) {

			request.setAttribute("result", "成功保存[" + "注册成功" + "]");

			return "regist";
		}

		request.setAttribute("result", "成功保存[" + "注册失败" + "]");

		return "regist";

	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getPassword() {
		return password;

	}

	public void setPassword(String password) {
		this.password = password;
	}

}

[color=brown][size=large]LoginService.java[/size][/color]

package com.struts.service;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class LoginService {

	Connection con = null;

	Statement stat = null;

	ResultSet rs = null;

	public LoginService() {

		try {

			Class.forName("com.mysql.jdbc.Driver");

			con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","");

			stat = con.createStatement();

		} catch (Exception e) {

			con = null;

		}
	}

	/**
	 * 登录用户check
	 * 
	 * @param userName
	 * @param passWord
	 */
	public boolean userLogin(String userName, String passWord) {

		String sql = "select * from tb_user where username='" + userName+"' and password ='"+passWord+"'";

		try {

			rs = executeQuery(sql);

			if (rs.next()) {

				return true;
			}

		} catch (SQLException e) {

			e.printStackTrace();
		}
		return false;
	}

	/**
	 * 数据库查询
	 * 
	 * @param userName
	 * @param passWord
	 */
	public ResultSet executeQuery(String sql) {

		try {

			rs = stat.executeQuery(sql);

		} catch (Exception e) {

			rs = null;

		}

		return rs;
	}

	public boolean userRegist(String userName, String passWord) {

		String sql = "insert into tb_user(username,password) values('"+userName+"','"+passWord+"')";

		try {

			stat.executeUpdate(sql);

			return true;

		} catch (Exception e) {
			e.printStackTrace();
		}

		return false;
	}


}

[size=medium][color=red]大致能跑的，就是跑数据库的时候有点问题，没那么多时间去研究了～
其实一直困扰的我的问题就是一个form里面有多个submit按钮时要怎么跳转到同一个action里面的不同的方法。

网上这种例子有很多，但大多数都实现不了。后来不经意看到一个论坛上一个帖子的一个神回复。于是试了一下果然成功了。
主要就是在struts.xml中加一句话，在上述代码中已经写出来了

就是这句话。

value必须是true，否则就不能动态的分配了。

就总结到这里了。希望大家相互指正，相互学习～[/color][/size]