【升级版】Java 登录，注册，传数据到后台小案例

其他 2019-06-03 15:31:29 阅读次数: 0

1.项目结构

2.项目所用文件

1）jar包  ojdbc5.jar     2）js     jquery-2.1.0.js , jquery.validate.min.js       3)css   bootstrap.css

3.项目

1）html与jsp页面

登录页面   login.html  

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        <style type="text/css">
            .login{
                width: 400px;
                margin: 0px auto;
                margin-top: 100px;
            }
            .my_txt_center{
                text-align: center;
            }
            .my_magin_top{
                margin-top: 15px;
            }
        </style>
        <script src="js/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
        <script type="text/javascript">
            $(function(){
                
                $("form:first").submit(function(){
                    var ok='<span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>';
                    var err=' <span class="glyphicon glyphicon-remove form-control-feedback" aria-hidden="true"></span>';
                    var uname= $("#uname");
                    var reg_uname = /^\w{3,8}$/;
                    if(reg_uname.test(uname.val())){
                        uname.parent().removeClass("has-error")
                        uname.parent().addClass("has-success");
                        uname.next().remove();
                        uname.after($(ok));
                    }else{
                        uname.parent().removeClass("has-success")
                        uname.parent().addClass("has-error");
                        uname.next().remove();
                        uname.after($(err));
                        return false;
                    }
                    
                    return true;
                })
                
                
                $("a[title]").click(function(){
                    location="reg.html";
                })
            })
        </script>
    </head>
    <body>
        <div class="login">
            <form action="doLogin" method="post">
        <div class="panel panel-primary">
            <div class="panel-heading my_txt_center"></span>学生管理系统-登录</div>
            <div class="panel-body">
                
                <div class="input-group  input-group-lg">
                    <span class="input-group-addon">
                        <span class="glyphicon glyphicon-user"></span>
                    </span>
                    <input class="form-control" type="text" name="uname" id="uname" value="" placeholder="请输入用户名" />
                </div>
                
                <div class="input-group input-group-lg my_magin_top">
                    <span class="input-group-addon">
                        <span class="glyphicon glyphicon-lock"></span>
                    </span>
                    <input class="form-control" type="password" name="pwd" id="pwd" value="" placeholder="请输入密码" />
                </div>
                <div class="my_magin_top text-center">
                    <button type="submit" class="btn btn-primary btn-lg"> 登 录 </button>
                    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <button type="reset" class="btn btn-warning btn-lg"> 重置 </button>
                    <a href="#" title="注册链接" > 注 册 </a>
                </div>
            </div>
        </div>
        </form>
        </div>
    </body>
</html>

注册页面  reg.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>注册</title>
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        <style type="text/css">
            .magin_center{
                margin: 0px auto;
                width: 400px;
            }
            .magin_center td{
                padding: 10px;
            }
            .magin_center table{
                width: 100%;
            }
        </style>
    </head>
    <body>
        
        <div class="panel panel-primary magin_center">
            <div class="panel-heading">用户注册</div>
            <div class="panel-body">
                <form method="post" action="doReg">
                    <table class="table table-hover">
                        <tr>
                            <td>姓名</td>
                            <td>
                                <input class="form-control" type="text" name="name" id="name" value="" placeholder="请输入姓名" />
                            </td>
                        </tr>
                        <tr>
                            <td>用户名</td>
                            <td><input class="form-control" type="text" name="userName" id="userName" value="" placeholder="请输入用户名" /></td>
                        </tr>
                        <tr>
                            <td>密码</td>
                            <td><input class="form-control" type="password" name="pwd" id="pwd" value="" placeholder="密码长度3~8位" /></td>
                        </tr>
                        <tr>
                            <td>性别</td>
                            <td>
                                <label>
                                    <input  type="radio" name="sex" checked="checked" id="" value="男" />男
                                </label>
                                <span style="display: inline-block;width: 50px;"></span>
                                <label>
                                    <input  type="radio" name="sex" id="" value="女" />女
                                </label>
                            </td>
                        </tr>
                        <tr align="center">
                            <td colspan="2">
                                <button type="submit" class="btn btn-primary"> 注 册 </button>
                                <button type="reset" class="btn btn-warning"> 重 置 </button>
                            </td>
                        </tr>
                    </table>
                    
                    
                </form>
            </div>
        </div>
        
    </body>
</html>

登录后主页面 main.jsp

<%@page import="java.util.List"%>
<%@page import="org.lq.login.entity.Userss"%>
<%@ 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">
    <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
    <script src="js/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
<title>Insert title here</title>
</head>
<body>
<%
        Userss user = (Userss)session.getAttribute("login_user");    
        //没有登陆
        if(user==null){
            response.sendRedirect("login.html");
            return;
        }
        /*
            展示所有用户信息
            删除
        */
        
%>
    <h1>欢迎:<%=user.getName() %></h1>

    <table class="table table-hover">
        <tr>
            <th>编号</th>
            <th>用户名</th>
            <th>姓名</th>
            <th>性别</th>
            <th>操作</th>
        </tr>
        
        <%
            List<Userss> list= (List<Userss>)session.getAttribute("user_list");
            for(Userss u : list){
                %>
                <tr>
                    <td><%=u.getUser_id() %></td>
                    <td><%=u.getUser_name() %></td>
                    <td><%=u.getName() %></td>
                    <td><%=u.getSex() %></td>
                    <td>
                        <%-- onclick="doDelete(<%=u.getUser_id()%>)"  --%>
                        <button type="button" title="delete" data-id="<%=u.getUser_id()%>" >删除</button>
                        <button type="button" title="update" data-id="<%=u.getUser_id()%>">修改</button>
                    </td>
                </tr>
                <%
            }
        %>        
    </table>   
</body>
<script type="text/javascript">

    $(function(){
        $("button[title=delete]").click(function(){
            //alert($(this).attr("data-id"));  jQuery
            //alert(this.dataset.id);  JavaScript
            if(confirm("确定删除吗?")){
                var id = $(this).attr("data-id");
                location = "doDelete?id="+id;
            }
            
        });
        
        $("button[title=update]").click(function(){
            //alert($(this).attr("data-id"));  jQuery
            //alert(this.dataset.id);  JavaScript
            var id = $(this).attr("data-id");
            location = "doUserById?id="+id;   
        });
    })

</script>
</html>

修改信息页面  update.jsp

<%@page import="org.lq.login.entity.Userss"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>注册</title>
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        <style type="text/css">
            .magin_center{
                margin: 0px auto;
                width: 400px;
            }
            .magin_center td{
                padding: 10px;
            }
            .magin_center table{
                width: 100%;
            }
        </style>
    </head>
    <body>
        <%
            Userss u = (Userss)request.getAttribute("update_user");
        %>
        <div class="panel panel-success magin_center">
            <div class="panel-heading">用户修改</div>
            <div class="panel-body">
                <form method="post" action="doUpdate">
                    <input type="hidden" name="id" value="<%= u.getUser_id()%>">
                    <table class="table table-hover">
                        <tr>
                            <td>姓名</td>
                            <td>
                                <input class="form-control" type="text" name="name" id="name" value="<%=u.getName() %>" placeholder="请输入姓名" />
                            </td>
                        </tr>
                        <tr>
                            <td>用户名</td>
                            <td><input class="form-control" type="text" name="userName" id="userName" value="<%=u.getUser_name() %>" placeholder="请输入用户名" /></td>
                        </tr>
                        <tr>
                            <td>密码</td>
                            <td><input class="form-control" type="password" name="pwd" id="pwd" value="" placeholder="密码长度3~8位" /></td>
                        </tr>
                        <tr>
                            <td>性别</td>
                            <td>
                                <label>
                                    <input  type="radio" name="sex" <%="男".equals(u.getSex()) ? "checked" : "" %> id="" value="男" />男
                                </label>
                                <span style="display: inline-block;width: 50px;"></span>
                                <label>
                                    <input  type="radio" name="sex" id="" <%="女".equals(u.getSex()) ? "checked" : "" %> value="女" />女
                                </label>
                            </td>
                        </tr>
                        <tr align="center">
                            <td colspan="2">
                                <button type="submit" class="btn btn-primary"> 修 改 </button>
                                <button type="reset" class="btn btn-warning"> 重 置 </button>
                            </td>
                        </tr>
                    </table>
                </form>
            </div>
        </div>
        
    </body>
</html>

2）Java代码

DAO层

UserssDao.java

package org.lq.login.dao;

import java.util.List;

import org.lq.login.entity.Userss;

public interface UserssDao {
    /**
     * 增加
     * @param userss
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    int save(Userss userss)throws Exception;
    /**
     * 删除
     * @param id
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    int delete(int id)throws Exception;
    /**
     * 修改全部(包含密码)
     * @param userss
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    int updateAll(Userss userss)throws Exception;
    /**
     * 修改不包含密码
     * @param userss
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    int update(Userss userss)throws Exception;
    /**
     * 查询全部
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    List<Userss> selectAll() throws Exception;
    /**
     * 通过Id查询
     * @param id
     * @return
     * @throws Exception
     * 作者 :dis.jiang
     */
    Userss getUserById(int id)throws Exception;
    
    
    /**
     * 登陆
     * @param uname
     * @return
     * 作者 :dis.jiang
     */
    Userss login(String uname);
    
}

UserssDaoImpl.java

package org.lq.login.dao.impl;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.lq.login.dao.UserssDao;
import org.lq.login.entity.Userss;
import org.lq.login.util.BaseDao;
/**
 * 
 * @author dis.jiang
 * 时间 : 2017年8月24日 17:29:28
 * 开发者 : dis.jiang
 * 小组 : dis.jiang
 */
public class UserssDaoImpl extends BaseDao implements UserssDao {

    @Override
    public int save(Userss userss) throws Exception {
        String sql="insert into userss values(userss_seq.nextval,?,?,?,?)";
        return super.execute(sql,userss.getUser_name(),userss.getPassword(),userss.getName(),userss.getSex());
    }

    @Override
    public int delete(int id) throws Exception {
        String sql="delete from userss where user_id=?";
        return super.execute(sql, id);
    }

    @Override
    public int update(Userss userss) throws Exception {
        String sql="update userss set user_name=?,name=?,sex=? where user_id =?";
        return super.execute(sql,userss.getUser_name(),userss.getName(),userss.getSex(),userss.getUser_id());
    }

    @Override
    public List<Userss> selectAll() throws Exception {
        List<Userss> list =new ArrayList<>();
        Userss userss=null;
        try {
            rs = select("select * from userss");
            while(rs.next()){
                userss = new Userss();
                userss.setUser_id(rs.getInt("user_id"));
                userss.setUser_name(rs.getString("user_name"));
                userss.setPassword(rs.getString("password"));
                userss.setName(rs.getString("name"));
                userss.setSex(rs.getString("sex"));
                list.add(userss);
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            closeAll();
        }
        return list;
    }

    @Override
    public Userss getUserById(int id) throws Exception {
        Userss userss=null;
        try {
            rs = select("select * from userss where user_id= ? ", id);
            while(rs.next()){
                userss = new Userss();
                userss.setUser_id(rs.getInt("user_id"));
                userss.setUser_name(rs.getString("user_name"));
                userss.setPassword(rs.getString("password"));
                userss.setName(rs.getString("name"));
                userss.setSex(rs.getString("sex"));
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            closeAll();
        }
        return userss;
    }

    @Override
    public Userss login(String uname) {
        Userss userss = null;
        rs=super.select("select * from userss where user_name=?", uname);
        try {
            if(rs.next()){
                userss=new Userss();
                userss.setUser_id(rs.getInt("user_id"));
                userss.setUser_name(rs.getString("user_name"));
                userss.setPassword(rs.getString("password"));
                userss.setName(rs.getString("name"));
                userss.setSex(rs.getString("sex"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            closeAll();
        }
        return userss;
    }

    @Override
    public int updateAll(Userss userss) throws Exception {
        String sql="update userss set user_name=?,password=?,name=?,sex=? where user_id =?";
        return super.execute(sql,userss.getUser_name(),userss.getPassword(),userss.getName(),userss.getSex(),userss.getUser_id());
    }

}

entity类

Userss.java

package org.lq.login.entity;

import java.io.Serializable;


public class Userss implements Serializable{
    //主键id
    private int user_id;
    //用户名
    private String user_name;
    //密码
    private String password;
    //姓名
    private String name;
    //性别
    private String sex;
    
    public int getUser_id() {
        return user_id;
    }
    public void setUser_id(int user_id) {
        this.user_id = user_id;
    }
    public String getUser_name() {
        return user_name;
    }
    public void setUser_name(String user_name) {
        this.user_name = user_name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
}

Service层

UserssService.java

package org.lq.login.service;

import java.util.List;

import org.lq.login.entity.Userss;

/**
 * 
 * @author dis.jiang
 * 时间 : 2017年8月18日
 * 开发者 : dis.jiang
 * 小组 : dis.jiang
 */
public interface UserssService {

    /**
     * 创建用户
     * @return
     * 作者 :dis.jiang
     */
    boolean createUser(Userss u);
    /**
     * 登陆
     * @param u
     * @return
     * 作者 :dis.jiang
     */
    Userss login(String uname,String pwd);
    
    List<Userss> findAll();
    
    boolean deleteById(int id);
    
    Userss getUserById(int id);
    
    boolean update(Userss u);
    
}

UserssServiceImpl.java

package org.lq.login.service.impl;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;

import org.lq.login.dao.UserssDao;
import org.lq.login.dao.impl.UserssDaoImpl;
import org.lq.login.entity.Userss;
import org.lq.login.service.UserssService;

import sun.misc.BASE64Encoder;

public class UserssServiceImpl implements UserssService {

    @Override
    public boolean createUser(Userss u) {
        boolean bool=false;
        UserssDao udao = new UserssDaoImpl();
        //将原始的密码进行加密然后赋值给当前对象
        u.setPassword(new_pwd(u.getPassword()));
        try {
            bool=udao.save(u)>0;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bool;
    }

    /**
     * 字符串加密
     * @param pwd
     * @return
     * 作者 :dis.jiang
     */
    private String new_pwd(String pwd){
        String rs_str="";
        BASE64Encoder encoder = new BASE64Encoder();
        try {
            MessageDigest sha=MessageDigest.getInstance("SHA");
            byte [] sha_bate= sha.digest(pwd.getBytes());
            rs_str = encoder.encode(sha_bate);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        
        return rs_str;
    }

    @Override
    public Userss login(String uname,String pwd) {
        UserssDao udao = new UserssDaoImpl();
        Userss user= udao.login(uname);
        //用户存在
        if(user!=null){
            //admin   QL0AFWMIX8NRZTKeof9cXsvbvu8=
            if(user.getPassword().equals(new_pwd(pwd))){
                return user;
            }
        }
        return null;
    }

    @Override
    public List<Userss> findAll() {
        UserssDao udao = new UserssDaoImpl();
        try {
            return udao.selectAll();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public boolean deleteById(int id) {
        UserssDao udao = new UserssDaoImpl();
        try {
            return udao.delete(id)>0;
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    @Override
    public Userss getUserById(int id) {
        UserssDao udao = new UserssDaoImpl();
        try {
            Userss user= udao.getUserById(id);
            return user;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public boolean update(Userss u) {
        UserssDao udao = new UserssDaoImpl();
        int num=0;
        //不需要修改密码
        try {
            if("".equals(u.getPassword())){
                num=udao.update(u);
            }else{
                u.setPassword(new_pwd(u.getPassword()));
                num=udao.updateAll(u);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return num>0;
    }
}

对密码进行SHA或者MD5加密 UserssDaoImplTest.java

package org.lq.login.test;

import static org.junit.Assert.fail;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.junit.Test;

import sun.misc.BASE64Encoder;

public class UserssDaoImplTest {


    @Test
    public void testSave() {
        String str ="1";
        try {
            BASE64Encoder base64en = new BASE64Encoder();
            //加密对象(JDK)
            MessageDigest md = MessageDigest.getInstance("SHA");
            //将指定的字符串进行加密
            byte[] bs= md.digest(str.getBytes());
            System.out.println(base64en.encode(bs));


//            //确定计算方法
//            MessageDigest md5=MessageDigest.getInstance("MD5");
//            //加密后的字符串
//            String newstr=base64en.encode(md5.digest(str.getBytes()));
//            System.out.println(newstr);
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    @Test
    public void testDelete() {
        fail("Not yet implemented");
    }

    @Test
    public void testUpdate() {
        fail("Not yet implemented");
    }

    @Test
    public void testSelectAll() {
        fail("Not yet implemented");
    }

    @Test
    public void testGetLoginById() {
        fail("Not yet implemented");
    }

}

工具类进行数据库连接  BaseDao.java

package org.lq.login.util;


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

public class BaseDao {
    
        private static final String DRIVER="oracle.jdbc.driver.OracleDriver";
        private static final String URL="jdbc:oracle:thin://@localhost:1521:orcl";
        private static final String USER="scott";
        private static final String PASSWORD="root";
        /**
         * 结果集
         */
        protected ResultSet rs;
        /**
         * 预处理ＳＱＬ对象
         */
        protected PreparedStatement ps;
        /**
         * 连接对象
         */
        protected Connection conn;
        
        protected Connection getConn(){
                Connection conn=null;
                try {
                    Class.forName(DRIVER);//加载数据库驱动
                     conn=DriverManager.getConnection(//DriverManager获取数据库连接
                              URL,
                              USER,
                              PASSWORD);
                } catch (ClassNotFoundException | SQLException e) {
                    e.printStackTrace();
                }
                return conn;
            }
        
        /**
         * 
         * @param rs
         * @param ps
         * @param conn
         * 作者 :dis.jiang
         */
    protected void closeAll(){
        try {
            if(rs!=null){
                rs.close();
                rs=null;
            }
            if(ps!=null){
                ps.close();
                ps=null;
            }
            if(conn!=null){
                conn.close();
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    //===========================通用的SQL操作==============================
    /**
     * 通用删除,修改,添加
     * @param sql
     * @param params
     * @return
     * 作者 :dis.jiang
     */
    public int execute(String sql,Object...params){
        int num=0;
        conn = getConn();
        try {
            ps=conn.prepareStatement(sql);
            for (int i = 0; i < params.length; i++) {
                ps.setObject(i+1, params[i]);
            }
            num= ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            closeAll();
        }
        return num;
    }

    /**
     * 通用查询
     * @param sql
     * @return
     * 作者 :dis.jiang
     */
    public ResultSet select(String sql,Object...params){
        conn = getConn();
        try {
            ps = conn.prepareStatement(sql);
            for (int i = 0; i < params.length; i++) {
                ps.setObject(i+1, params[i]);
            }
            rs=ps.executeQuery();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return rs;
    }
    
}

web层

doLogin.java

package org.lq.login.web;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.lq.login.entity.Userss;
import org.lq.login.service.UserssService;
import org.lq.login.service.impl.UserssServiceImpl;

/**
 * Servlet implementation class doLogin
 */
public class doLogin extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public doLogin() {
        super();
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        HttpSession session = request.getSession();
        String url="login.html";
        
        String uname= request.getParameter("uname");
        String pwd = request.getParameter("pwd");
        
        UserssService userssService = new UserssServiceImpl();
        Userss user= userssService.login(uname, pwd);
        if(user != null){
            session.setAttribute("login_user", user);
            //查询所有
            List<Userss> list=userssService.findAll();
            session.setAttribute("user_list", list);
            url="main.jsp";
        }
        
        response.sendRedirect(url);
        
        
    }

}

doReg.java

package org.lq.login.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.lq.login.entity.Userss;
import org.lq.login.service.UserssService;
import org.lq.login.service.impl.UserssServiceImpl;

/**
 * Servlet implementation class doReg
 */
public class doReg extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public doReg() {
        super();
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }
    //Tomcat 调用的
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        String uname = request.getParameter("userName");
        String pwd = request.getParameter("pwd");
        String sex = request.getParameter("sex");
        //设置默认跳转页面
        String url ="reg.html";

        Userss u = new Userss();
        u.setName(name);
        u.setUser_name(uname);
        u.setPassword(pwd);
        u.setSex(sex);

        UserssService userssService = new UserssServiceImpl();
        boolean bool= userssService.createUser(u);
        if(bool == true){
            //如果添加成功,跳转登陆
            url="login.html";
        }
        response.sendRedirect(url);

    }

}

doDelete.java

package org.lq.login.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.lq.login.service.UserssService;
import org.lq.login.service.impl.UserssServiceImpl;

/**
 * Servlet implementation class doDelete
 */
public class doDelete extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public doDelete() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        String id= request.getParameter("id");
        String url="main.jsp";
        
        UserssService userssService = new UserssServiceImpl();
        boolean bool= userssService.deleteById(Integer.parseInt(id));
        if(bool == true){
            //查询所有
            request.getSession().setAttribute("user_list", userssService.findAll());
        }
        response.sendRedirect(url);
        
        
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
    }

}

doUpdate.java

package org.lq.login.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.lq.login.entity.Userss;
import org.lq.login.service.UserssService;
import org.lq.login.service.impl.UserssServiceImpl;

/**
 * Servlet implementation class doUpdate
 */
public class doUpdate extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public doUpdate() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        String uname = request.getParameter("userName");
        String pwd = request.getParameter("pwd");
        String sex = request.getParameter("sex");
        String id = request.getParameter("id");
        //设置默认跳转页面
        String url ="doUserById?id="+id;

        Userss u = new Userss();
        u.setName(name);
        u.setUser_name(uname);
        u.setPassword(pwd);
        u.setSex(sex);
        u.setUser_id(Integer.valueOf(id));
        UserssService userssService = new UserssServiceImpl();
        boolean bool =userssService.update(u);
        if(bool == true){
            //修改成功
            //查询所有
            request.getSession().setAttribute("user_list", userssService.findAll());
            url="main.jsp";
        }
        response.sendRedirect(url);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

doUserById.java

package org.lq.login.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.lq.login.entity.Userss;
import org.lq.login.service.UserssService;
import org.lq.login.service.impl.UserssServiceImpl;

/**
 * Servlet implementation class doUserById
 */
public class doUserById extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public doUserById() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        String uid= request.getParameter("id");
        //通过用户ID查询需要修改的用户对象
        
        UserssService userssService = new UserssServiceImpl();
        Userss user= userssService.getUserById(Integer.valueOf(uid));
        request.setAttribute("update_user", user);
        request.getRequestDispatcher("update.jsp").forward(request, response);
        
        
        
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

数据库表

运行结果：

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转载自www.cnblogs.com/jiangaihu/p/10967732.html
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