一步一步教你用IntelliJ IDEA 搭建SSM框架(3)——實現用戶登陸功能

上面兩篇博客已經詳細的介紹了在IntelliJ IDEA 搭建SSM框架的整個過程,下面咱們就要在搭建好的環境裏實現咱們想要的功能了。本文完成用戶的登陸功能,主要包括:用戶註冊,登陸,編輯,退出,註銷html

第一步:設計user表,並用mybatis-geneator生成user表對應的數據文件java

        首先,咱們在test數據庫里加一張user表,代碼以下jquery

use test; CREATE TABLE `user` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(40) NOT NULL, `password` varchar(255) NOT NULL, `age` int(4) NOT NULL, `description` varchar(255) NOT NULL,   
    PRIMARY KEY (`id`) )ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8; select * from user;

 

      而後,用mybatis-geneator生成user表對應的數據文件。打開generator.properties文件,table=message改成table=user,點擊IntelliJ IDEA右側邊欄的Maven Projects,雙擊 mybatis-generator:generate,運行成功之後會多user表的相關數據文件,以下圖:git

 

注意:若是須要一次生成全部表的數據文件,先把dao,entity,sqlmap裏面的文件都清空,而後打開generatorConfig.xml,把table標籤替換爲下面的代碼便可github

<table schema="" tableName="%"  enableCountByExample="false"
enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false"/>
如今,user數據表已經綁定成功。下面按照上一篇中測試message的方法,用junit測試工具,測一下數據能不能正常寫入數據庫。

第二步
新建文件
在controller文件夾下添加userController.java和homeController.java文件
userController.java:跟用戶有關的路由都會寫在這個文件裏
homeController.java:寫登陸成功之後的路由

在service文件夾下,添加UserService.java文件和impl文件夾,在impl文件夾下,添加UserServiceImpl.java
 
UserService.java:存放業務層接口
UserServiceImpl.java:實現業務層接口

在js文件夾下添加jQuery文件引用,我這裏加的是jquery-3.3.1.js

在views文件夾下添加:login.jsp,home.jsp,detail.jsp,register.jsp

login.jsp:登陸頁面

home.jsp:登陸之後的頁面

detail.jsp:編輯用戶信息頁面

register.jsp:用戶註冊頁面

第三步首頁

index.jsp代碼以下:
 
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<h2>歡迎來到首頁,請先登陸</h2>
<div>
    <a href="/user/login">登陸</a>
    <a href="/user/register">註冊</a>
</div>
    </body>
</html>
View Code

第四步
註冊功能

1,寫註冊頁面,在register.jsp中添加代碼以下:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>用戶註冊</h2>
<form action="/user/register" method="post"> 用戶名:<input type="text" name="name"> 密碼:<input type="password" name="password"> 年齡:<input type="text" name="age"> 描述:<input type="text" name="description">
    <input type="submit" value="保存">
</form>
</body>
<script>
        if(${status} == 0){ alert("註冊成功") location.href="/"; } </script>
</html>
View Code
2,dao中實現數據庫操做
dao文件夾中的UserMapper已經有insert接口,sqlmap中的UserMapper.xml中已經實現insert,因此只需在
dao文件夾中的UserMapper中添加selectUserByName接口,在sqlmap中的UserMapper.xml中添加selectUserByName實現。代碼以下:
List<User> selectUserByName(User record);
<select id="selectUserByName" resultMap="BaseResultMap" parameterType="cn.only.entity.User" > select * from user where name = #{name,jdbcType=VARCHAR} </select>
 
3,service層實現業務邏輯
在UserService.java中寫註冊接口insert,和根據用戶名查找用戶接口selectUserByName,代碼以下:
package cn.only.service; import cn.only.entity.User; import java.util.List; public interface UserService { int insert(User record); List<User> selectUserByName(User record); }
View Code
 
4,在UserServiceImpl.java中實現以上接口,代碼以下:
package cn.only.service.impl; import cn.only.dao.UserMapper; import cn.only.entity.User; import cn.only.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class  UserServiceImpl implements UserService{ @Autowired private UserMapper mapper; public  int insert(User record){return mapper.insert(record);} public List<User> selectUserByName(User record){return mapper.selectUserByName(record);} }
View Code
5,在userController.java中寫路由,代碼以下:
package cn.only.controller; import cn.only.entity.User; import cn.only.service.UserService; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import java.util.List; @Controller @RequestMapping("/user") public class userController { @Resource private UserService userService; @RequestMapping(value="/register") public String register(HttpServletRequest request, Model model){ return "register"; } @RequestMapping(value="/register",method= RequestMethod.POST) public String addUser(@ModelAttribute User user, Model model){ List<User> list=userService.selectUserByName(user); if(list.size()==0){ if(userService.insert(user)==1){ model.addAttribute("status",0); }else{ model.addAttribute("status",1); } }else{ model.addAttribute("status",2); } return "register"; } }
View Code
第五步登陸功能
 
1,寫登陸頁面,在login.jsp文件,代碼以下:
 
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登陸</title>
</head>
<h2>登陸</h2>
<form action="/user/login" method="post"> 用戶名:<input type="text" name="name"> 密碼:<input type="password" name="password">
    <input type="submit" value="登陸">
    <a href="/user/register">註冊</a>
</form>
</body>
<script>
    if(${status} == 0){ alert("登陸成功"); location.href="/home"; }else{ alert("登陸失敗,用戶名或密碼錯誤"); } </script>
</html>
View Code
2,dao中實現數據庫操做
dao文件夾中的UserMapper中添加login接口,在sqlmap中的UserMapper.xml中添加login實現。代碼以下:
User login(User record);
<select id="login" resultMap="BaseResultMap" parameterType="cn.only.entity.User" > select * from user where name = #{name,jdbcType=VARCHAR} AND password=#{password,jdbcType=VARCHAR} </select>

 

3,service層實現業務邏輯

在UserService.java中寫登陸接口login,代碼以下:
User login(User record);

 

4,在UserServiceImpl.java中實現以上接口,代碼以下:
 
public User login(User record){return mapper.login(record);}
 

5,在userController.java中寫路由,添加代碼以下:
@RequestMapping(value="/login") public String loginPage(@ModelAttribute User user, Model model){ return "login"; } @RequestMapping(value="/login",method= RequestMethod.POST) public String login(@ModelAttribute User user, Model model, HttpSession session){ User u=userService.login(user); if(u!=null){ u.setPassword(""); session.setAttribute("user", u); model.addAttribute("status",0); model.addAttribute("user",user); }else{ model.addAttribute("status",1); } return "login"; }
View Code
 

 

第六步登陸成功之後的頁面home

home.jsp代碼以下:
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>主頁</title>
    <script src="/js/jquery-3.3.1.js"></script>
</head>
<body>
<script>

    function deleteUser() { if(confirm("用戶一旦刪除須要從新註冊,肯定刪除用戶?")){ jQuery.ajax({url:"/user/delete",async:false,type:"DELETE", success:function (restult) { if(restult == 1){ alert("用戶註銷成功"); location.href="/user/login"; }else{ alert("用戶註銷失敗"); } } }); } } </script>
<p style="margin-top:100px;text-align: center">歡迎<span style="font-weight: bolder">${user.name}</span>登陸</p>
<a href="/user/detail">修改我的信息</a>
<a href="/user/logout">退出</a>
<a href="JavaScript:void(0)" onclick="deleteUser()">註銷</a>
</body>
<script>

</script>
</html>
View Code
 
在homeController.java中寫路由,添加代碼以下:
package cn.only.controller; import cn.only.entity.User; import cn.only.service.UserService; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import javax.annotation.Resource; import javax.servlet.http.HttpSession; @Controller public class homeController { @Resource private UserService userService; @RequestMapping(value="/home") public String home(HttpSession session, Model model){ User u = (User) session.getAttribute("user"); if(u != null){ model.addAttribute("user", u); } return "home"; } }
View Code

 

 
第七步編輯用戶

1,編輯頁面,在detail.jsp文件,代碼以下:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用戶信息</title>
</head>
<h2>用戶信息修改</h2>
<form action="/user/detail" method="post"> 用戶名:<input type="text" name="name" value="${user.name}" disabled> 年齡:<input type="text" name="age" value="${user.age}"> 描述:<input type="text" name="description" value="${user.description}">
    <input type="submit" value="保存">
</form>
</body>
<script>
    if(${status} == 0){ alert("修改爲功") location.href="/home"; } </script>
</html>
View Code

2,dao中實現數據庫操做
dao文件夾中的UserMapper中默認已經添加了selectByPrimaryKey和updateByPrimaryKey兩個接口
在sqlmap中的UserMapper.xml中也已經實現上面的接口。updateByPrimaryKey修改代碼以下:
<update id="updateByPrimaryKey" parameterType="cn.only.entity.User" >
update user
set name = #{name,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER},
description = #{description,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>

 3,service層實現業務邏輯web

在UserService.java中添加根據id查找用戶接口selectByPrimaryKey和更新用戶接口updateByPrimaryKey,代碼以下:
User selectByPrimaryKey(Integer id);
int updateByPrimaryKey(User record);

 

4,在UserServiceImpl.java中實現以上接口,代碼以下:
 
public User selectByPrimaryKey(Integer id){return  mapper.selectByPrimaryKey(id);}
public int updateByPrimaryKey(User record){return mapper.updateByPrimaryKey(record);}
 

5,在userController.java中寫路由,添加代碼以下:
@RequestMapping(value="/detail") public String detail(HttpSession session, Model model){ int id=((User)session.getAttribute("user")).getId(); User u =userService.selectByPrimaryKey(id); model.addAttribute("user",u); return "detail"; } @RequestMapping(value="/detail",method= RequestMethod.POST) public String editUser(@ModelAttribute User user, Model model,HttpSession session){ User un = (User) session.getAttribute("user"); User u=(User)userService.selectByPrimaryKey(un.getId()); if(u!=null){ user.setId(un.getId()); user.setName(un.getName()); if(userService.updateByPrimaryKey(user)==1){ model.addAttribute("status",0); }else{ model.addAttribute("status",1); } }else{ model.addAttribute("status",2); } return "detail"; }
View Code

第八步
退出
在userController.java中寫退出路由,添加代碼以下:
@RequestMapping(value="/logout",method= RequestMethod.GET) public String logout(HttpSession session){ session.invalidate(); return "redirect:/user/login"; }
第九步註銷

註銷用戶:刪除用戶
home.jsp中發送的ajax請求以下
function deleteUser() { if(confirm("用戶一旦刪除須要從新註冊,肯定刪除用戶?")){ jQuery.ajax({url:"/user/delete",async:false,type:"DELETE", success:function (restult) { if(restult == 1){ alert("用戶註銷成功"); location.href="/user/login"; }else{ alert("用戶註銷失敗"); } } }); } }

 

dao文件夾中的UserMapper中默認已經添加了deleteByPrimaryKey接口
在sqlmap中的UserMapper.xml中的實現代碼以下:
 
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from user where id = #{id,jdbcType=INTEGER} </delete>
 

在userController.java中寫路由,添加代碼以下:
 
 @ResponseBody @RequestMapping(value="/delete",method= RequestMethod.DELETE) public Integer delete(HttpSession session, Model model){ User u = (User) session.getAttribute("user"); int result=0; if(u != null){ result= userService.deleteByPrimaryKey(u.getId()); session.setAttribute("user",null); System.out.println("Result:"+result); } return result; }
 

 

到此已經完:用戶註冊,登陸,編輯,退出,註銷
 
代碼下載地址:https://github.com/greenteaone/helloworld

原文出處:https://www.cnblogs.com/greenteaone/p/11089389.htmlajax

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