Struts2+MySQL登录注册

下载地址：http://download.csdn.net/detail/qq_33599520/9777172

项目结构图：

代码：

package com.mstf.action;

import java.util.List;

import com.mstf.entiity.User;
import com.mstf.service.UserBiz;

public class UserAction {  // 控制器
	private UserBiz userBiz;
	private User user;
	private String msg;
	
	public String getMsg() {
		return msg;
	}
	public void setMsg(String msg) {
		this.msg = msg;
	}
	
	List<User> users;
	
	public User getUser() {
		return user;
	}
	public void setUser(User user) {
		this.user = user;
	}
	public List<User> getUsers() {
		return users;
	}
	public void setUsers(List<User> users) {
		this.users = users;
	}
	
	// 用户登录的方法
	public String login(){
		userBiz = new UserBiz();
		if(userBiz.validateUser(user))
			return "welcome";
		else{
			msg = "请重新登陆";
			return "error";
		}
	}
	
	// 用户注册的方法
	public String regist(){
		userBiz = new UserBiz();
		if(userBiz.registUser(user))
			return "sucess";
		else{
			msg = "注册失败，请重新登陆";
			return "fall";
		}
	}
	
	// 显示所有注册用户的方法
	public String showUsers(){
		userBiz = new UserBiz();
		users = userBiz.findAllUsers();
		return "welcome";
	}
}

　　

package com.mstf.dao;


import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.mstf.db.DbHelper;
import com.mstf.entiity.User;

public class UserDAO {  // 用户的dao
	
	// 用户登录
	public boolean checkUser(User user){
		Connection conn = DbHelper.getConnection();
		String sql = "select * from admin where `userName`=? and `passWord`=?";
		try {
			 PreparedStatement pstmt = conn.prepareStatement(sql);
			 pstmt.setString(1, user.getUserName());
			 pstmt.setString(2, user.getPassWord());
			 ResultSet rs = pstmt.executeQuery();
			 if(rs.next())
				return true;
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return false;
	}
	
	// 用户注册
	public boolean saveUser(User user){
		Connection conn = DbHelper.getConnection();
		String sql = "insert into admin values(null,?,?)";
		try {
			 PreparedStatement pstmt = conn.prepareStatement(sql);
			 pstmt.setString(1, user.getUserName());
			 pstmt.setString(2, user.getPassWord());
			 int num = pstmt.executeUpdate();
			 if(num>0)
				return true;
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return false;
	}
	
	// 显示所有注册用户
	public List<User> findAllUsers(){
		Connection conn = DbHelper.getConnection();
		String sql = "select * from admin";
		List<User> users = new ArrayList<User>();
		try {
			 PreparedStatement pstmt = conn.prepareStatement(sql);
			 ResultSet rs = pstmt.executeQuery();
			 while(rs.next()){
				 User user = new User();
				 user.setId(rs.getInt("id"));
				 user.setUserName(rs.getString("userName"));
				 user.setPassWord(rs.getString("passWord"));
				 users.add(user);
			 }
						 
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return users;
	}
}

　　

package com.mstf.db;

import java.sql.Connection;
import java.sql.DriverManager;

public class DbHelper {
	private static String url = "jdbc:mysql://localhost:3306/test";  //数据库地址
	private static String userName = "root";  //数据库用户名
	private static String passWord = "root";  //数据库密码
	private static Connection conn;
	
	private DbHelper(){
		
	}
	
	public static Connection getConnection(){
		if(null == conn){
			try {
				Class.forName("com.mysql.jdbc.Driver");
				conn = DriverManager.getConnection(url, userName, passWord);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return conn;
	}
	
	public static void main(String[] args) {  //测试数据库是否连通
		System.err.println(getConnection());
	}
}

　　

package com.mstf.entiity;

public class User {  // 实体类
	private int id;
	private String userName;
	private String passWord;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	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;
	}
	public User(){
			
	}
}

　　

package com.mstf.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginFilter extends HttpServlet implements Filter {  // 登录过滤器

	private static final long serialVersionUID = 1L;

	public void destroy() {
    }

    public void doFilter(ServletRequest srq, ServletResponse srp, FilterChain filterChain) throws IOException, ServletException{
        
        HttpServletRequest request = (HttpServletRequest) srq;      
        HttpServletResponse response = (HttpServletResponse) srp;      
        HttpSession session = request.getSession();      
        String url=request.getServletPath();  
        String contextPath=request.getContextPath();  
        if(url.equals("")) url+="/";  
        if((url.startsWith("/")&&!url.startsWith("/index.jsp"))){//若访问后台资源 过滤到login  
             String userName=(String)session.getAttribute("userName");  
             if(userName==null){//转入管理员登陆页面  
                  response.sendRedirect(contextPath+"/index.jsp"); 
                  return;  
             }  
        }  
          filterChain.doFilter(srq, srp);    
    }  

    public void init(FilterConfig arg0) throws ServletException {

    }
}

　　

package com.mstf.service;

import java.util.List;

import com.mstf.dao.UserDAO;
import com.mstf.entiity.User;

public class UserBiz {  // 业务层（服务层/逻辑处理层）
	private UserDAO userDao;
	
	// 验证用户登录是否合法
	public boolean validateUser(User user){
		userDao = new UserDAO();
		// 业务层调用DAO的具体方法
		return userDao.checkUser(user);
	}
		
	// 用户用户注册
	public boolean registUser(User user){
		userDao = new UserDAO();
		return userDao.saveUser(user);
	}
	
	// 获得所有注册用户
	public List<User> findAllUsers(){
		userDao = new UserDAO();
		return userDao.findAllUsers();
	}
}

　　

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <package name="test" namespace="/"  extends="struts-default">
        <action name="login" class="com.mstf.action.UserAction" method="login">
			<result name="welcome" type="redirectAction">
				<param name="actionName">showUsers</param>
			</result>
			<result name="error">/error.jsp</result>
		</action>
		<action name="regist" class="com.mstf.action.UserAction" method="regist">
			<result name="sucess">/sucess.jsp</result>
			<result name="fall">/fall.jsp</result>
		</action>
		<action name="showUsers" class="com.mstf.action.UserAction" method="showUsers">
			<result name="welcome">/welcome.jsp</result>
		</action>
    </package>

</struts>

　　

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <display-name></display-name>
    
    <!-- 起始页面 -->
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <!-- 过滤器 用于初始化struts2 -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <!-- 用于struts2 的过滤器映射 -->
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- 登陆验证过滤器 -->
    <filter>
         <filter-name>loginFilter</filter-name>
         <filter-class>com.mstf.filter.LoginFilter</filter-class>
    </filter>
	<filter-mapping>
         <filter-name>loginFilter</filter-name>

         <url-pattern>/error.jsp</url-pattern>
         <url-pattern>/fall.jsp</url-pattern>
         <url-pattern>/sucess.jsp</url-pattern>
         <url-pattern>/welcome.jsp</url-pattern>
	</filter-mapping> 
</web-app>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录失败</title>
</head>
<body>
	<h1>用户名或密码错误！请重新登录。</h1>
	<a href="index.jsp">返回后台管理首页</a>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册失败</title>
</head>
<body>
	<h1>很遗憾，注册失败！</h1>
	<a href="index.jsp">返回后台管理首页</a>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>后台管理</title>
</head>
<body>
	<form action="login" method="post">
		<table>
			<tr>
				<td>帐号：
					<input type="text" name="user.userName" maxlength="16">
				</td>
			</tr>
			<tr>
				<td>密码：
					<input type="password" name="user.passWord" maxlength="16">
				</td>
			</tr>
			<tr>
				<td>
					<input type="submit" value="登录">
				</td>
				<td>
					<a href="regeist.jsp">注册</a>
				</td>
			</tr>
		</table>
	</form>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户注册</title>
</head>
<body>
	<form action="regist" method="post" onsubmit="return check(this);">
		<table>
			<tr>
				<td>帐号：
					<input type="text" name="user.userName" maxlength="16">
				</td>
			</tr>
			<tr>
				<td>输入密码：
					<input type="password" name="user.passWord" maxlength="16">
				</td>
			</tr>
			<tr>
				<td>
					<input type="submit" value="注册">
				</td>
				<td>
					<a href="index.jsp">返回登录</a>
				</td>
			</tr>
		</table>
	</form>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册成功</title>
</head>
<body>
	<h1>恭喜您，${user.userName }注册成功！</h1>
	<a href="index.jsp">返回后台管理首页登录</a>
</body>
</html>

　　

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>欢迎登录</title>
</head>
<body>
	<h1>欢迎${user.userName }登录成功！</h1>
	<br><br>
	<h2>已经注册的用户：</h2>
	<br>
	<table border="1px" width="600px" align="center">
			<tr>
				<td>
					ID:
				</td>
				<td>
					用户名:
				</td>
				<td>
					密码:
				</td>
			</tr>
			<c:forEach items="${users }" var="user">
				<tr>
					<td>
						${user.id }
					</td>
					<td>
						${user.userName }
					</td>
					<td>
						${user.passWord }
					</td>
				</tr>
			</c:forEach>
	</table>
	<a href="index.jsp">返回后台管理首页</a>
</body>
</html>

　　下载地址：http://download.csdn.net/detail/qq_33599520/9777172