本文重在實現理解，過濾器，業務，邏輯需求，樣式請無視。。

項目結構如下

1.idea新建Spring boot項目，在pom中加上thymeleaf和mybatis支持。pom.xml代碼如下

<?xml version='1.0' encoding='UTF-8'?><project xmlns='http://maven.apache.org/POM/4.0.0' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd'> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.jz</groupId> <artifactId>table</artifactId> <version>0.0.1-SNAPSHOT</version> <name>table</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>

2. 在項目resources目錄下新建mybatis文件夾，用于存放mybatis配置文件。 在 application.properties 中配置本地數據源和mybatis配置文件地址, application.properties代碼如下

spring.datasource.driverClassName=com.mysql.cj.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTCspring.datasource.username=用戶名spring.datasource.password=密碼spring.jpa.showSql=truemybatis: mybatis.type-aliases-package=com.jz.table.entity mybatis.mapper-locations=mybatis/*.xml

com.mysql.cj.jdbc.Driver 是 mysql-connector-java 6中的，需要指定時區serverTimezone

2.2在啟動類上加上掃描的Dao包

package com.jz.table;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication@MapperScan('com.jz.table.dao')public class TableApplication { public static void main(String[] args) { SpringApplication.run(TableApplication.class, args); }}

3.數據庫建兩個表admin和userinfo用于登錄和操作用

2019.10.3 現在mysql不能用admin作為表名了，請注意一下

4.開始寫代碼

entity:實體代碼

1.Admin實體類

package com.jz.table.entity;public class Admin { private Integer id; private String name; private Integer password; private String job; public Admin() { } public Admin(Integer id, String name, Integer password, String job) { this.id = id; this.name = name; this.password = password; this.job = job; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getPassword() { return password; } public void setPassword(Integer password) { this.password = password; } public String getJob() { return job; } public void setJob(String job) { this.job = job; }}

2.UserInfo實體類

package com.jz.table.entity;public class UserInfo { private Integer id; private String name; private Integer age; private String sex; public UserInfo() { } public UserInfo(Integer id, String name, Integer age, String sex) { this.id = id; this.name = name; this.age = age; this.sex = sex; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; }}

Dao層代碼1.AdminDao

package com.jz.table.dao;import com.jz.table.entity.Admin;public interface AdminDao { //登錄判斷 Admin login(Admin admin); //注冊 int addAdmin(Admin admin);}

2.UserDao

package com.jz.table.dao;import com.jz.table.entity.UserInfo;import java.util.List;public interface UserDao { //查 List<UserInfo> findall(); //增 int adduser(UserInfo user); //根據Id查，用于修改時頁面回顯數據 UserInfo findByid(Integer id); //修改 int updateUser(UserInfo user); //刪除 int delUser(Integer id);}

3.XML文件，因為沒有業務邏輯，service省了，controller中直接引入dao1.AdminMapper.xml

<?xml version='1.0' encoding='UTF-8' ?><!DOCTYPE mapper PUBLIC '-//mybatis.org//DTD Mapper 3.0//EN' 'http://mybatis.org/dtd/mybatis-3-mapper.dtd' ><mapper namespace='com.jz.table.dao.AdminDao'> <select parameterType='com.jz.table.entity.Admin' resultType='com.jz.table.entity.Admin'> select name,job FROM admin WHERE name = #{name} AND password = #{password} </select> <insert parameterType='com.jz.table.entity.Admin'> INSERT INTO admin (name,password,job) VALUES (#{name},#{password},#{job}); </insert></mapper>

2.UserMapper.xml

<?xml version='1.0' encoding='UTF-8' ?><!DOCTYPE mapper PUBLIC '-//mybatis.org//DTD Mapper 3.0//EN' 'http://mybatis.org/dtd/mybatis-3-mapper.dtd' ><mapper namespace='com.jz.table.dao.UserDao'> <select resultType='com.jz.table.entity.UserInfo'> select * from userinfo </select> <insert parameterType='com.jz.table.entity.UserInfo'> INSERT INTO userinfo(name,age,sex) VALUES (#{name},#{age},#{sex}) </insert> <select parameterType='java.lang.Integer' resultType='com.jz.table.entity.UserInfo'> SELECT * FROM userinfo where id = #{id} </select> <update parameterType='com.jz.table.entity.UserInfo'> update userinfo SET name=#{name },age =#{age},sex=#{sex} WHERE id = #{id} </update> <delete parameterType='java.lang.Integer'> DELETE from userinfo WHERE id = #{id} </delete></mapper>

4.頁面,在templates文件夾下新建public和user文件夾用來存放公共頁面和user操作頁面public文件夾下新建成功、失敗提示頁1.success.html

<!DOCTYPE html><!--引入thymeleaf--><html lang='en' xmlns:th='http://www.thymeleaf.org'> <head> <meta charset='UTF-8'> <title>操作成功提示頁</title></head><body><h1>操作成功</h1><a href='http://www.hdgsjgj.cn/index' rel='external nofollow' rel='external nofollow' > 返回首頁</a></body></html>

2.false.html

<!DOCTYPE html><html lang='en' xmlns:th='http://www.thymeleaf.org'><head> <meta charset='UTF-8'> <title>操作失敗提示頁</title> <script th:src='http://www.hdgsjgj.cn/bcjs/@{/js/jquery-1.8.0.min.js}'></script></head><body><h1>操作失敗，請檢查數據重試</h1><input onclick='history.go(-1)' type='button' value='返回'></body></html>

4.2在templates文件夾下新建login和register頁面作為登錄和注冊頁面1.login.html

<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>首頁</title> <style> /*a標簽去下劃線和點擊不變色，div內容居中*/ a{ text-decoration: none; color: #333333; } #idiv{text-align: center;border-radius: 20px; width: 300px; height: 350px; margin: auto; position: absolute; top: 0; left: 0; right: 0; bottom: 0;} </style></head><body><div id='idiv'> <form action='/gologin' method='post'> 請輸入姓名<input name='name' required='required'><br><br> 請輸入密碼<input name='password' type='password' placeholder='僅支持正整數' required='required'><br><br> <input type='submit' value='登錄'> <button> <a href='http://www.hdgsjgj.cn/goregister' rel='external nofollow' >注冊</a></button> </form></div></body></html>

2.register.html

<!DOCTYPE html><html lang='en' xmlns:th='http://www.thymeleaf.org'><head> <meta charset='UTF-8'> <title>賬號注冊</title> <script th:src='http://www.hdgsjgj.cn/bcjs/@{/js/jquery-1.8.0.min.js}'></script></head><body><h2>賬號注冊</h2>請輸入姓名：<input type='text' /><br><br>請輸入密碼：<input type='password' placeholder='僅支持整數' /><br><br>請確認密碼：<input type='password' placeholder='僅支持整數'/><br><br>請選擇角色：<select style='width: 173px'> <option value='管理員'>管理員</option> </select><br><br><button onclick='register()'>注冊</button></body><script> function register() { var name = $('#name').val(); var password1 = $('#password').val(); var password2 = $('#passwordTwo').val(); var job = $('#job').val(); if (Number(password1) == Number(password2)){ $.post('/register',{name:name,password:password1,job:job},function (res) { if (res ==true){ alert('注冊成功'); window.location.href ='http://www.hdgsjgj.cn/login'; } else { alert('注冊失敗，請檢查數據重試'); } }) }else { alert('兩次密碼不一致！'); } }</script></html>

3.controller中代碼

@Controllerpublic class TestController { @Resource private AdminDao ad; @Resource private UserDao ud; @RequestMapping('/login')//主頁 public String index(){ return 'login'; } @RequestMapping('/goregister')//去注冊頁面 public String goregister(){ return 'register'; } @RequestMapping('/register')//注冊 @ResponseBody public boolean register(Admin admin){ int i = ad.addAdmin(admin); if (i>0){ return true; }else { return false; } } @RequestMapping('/gologin')//登錄獲取用戶信息存到seccion public String gologin(Admin admin,HttpServletRequest request,Model model){ Admin aa = ad.login(admin); if (aa==null){ return 'public/false'; } HttpSession session = request.getSession(); session.setAttribute('aname',admin.getName()); session.setAttribute('apassword',admin.getPassword()); List<UserInfo> userlist = ud.findall(); model.addAttribute('admin',aa); model.addAttribute('alist',userlist); return 'user/index'; } @RequestMapping('/index')//從其他頁面操作后返回列表頁面（重復登錄） public String login(Admin admin,Model model,HttpServletRequest request){ HttpSession session = request.getSession(); admin.setName((String) session.getAttribute('aname')); admin.setPassword((Integer) session.getAttribute('apassword')); Admin aa = ad.login(admin); List<UserInfo> userlist = ud.findall(); model.addAttribute('admin',aa); model.addAttribute('alist',userlist); return 'user/index'; }}

4.3user文件夾下新建index,addUser,updateUser頁面，作為主頁，添加，修改頁面

1.index.html

<!DOCTYPE html><html lang='en' xmlns:th='http://www.thymeleaf.org'><head> <meta charset='UTF-8'> <title>首頁</title> <style>a{text-decoration:none}</style> <script th:src='http://www.hdgsjgj.cn/bcjs/@{/js/jquery-1.8.0.min.js}'></script></head><body>歡迎你 ：<input th:value='${admin.name}' /><br><br><br><br><h2>人員信息維護</h2><table border='1'> <thead> <tr> <th>id</th> <th>姓名</th> <th>年齡</th> <th>性別</th> <th>操作</th> </tr> <tr th:each='user:${alist}'> <td th:text='${user.id}'></td> <td th:text='${user.name}'></td> <td th:text='${user.age}'></td> <td th:text='${user.sex}'></td> <td align='center'><a th:href='http://www.hdgsjgj.cn/bcjs/@{’/goupdate/’+${user.id}}' rel='external nofollow' >修改</a> <a th:href='http://www.hdgsjgj.cn/bcjs/@{’/godel/’+${user.id}}' rel='external nofollow' >刪除</a> </td> </tr> </thead></table><button><a href='http://www.hdgsjgj.cn/goadd' rel='external nofollow' >添加</a></button></body></html>

2.addUser.html

<!DOCTYPE html><html lang='en' xmlns:th='http://www.thymeleaf.org'><head> <meta charset='UTF-8'> <title>添加用戶</title> <script th:src='http://www.hdgsjgj.cn/bcjs/@{/js/jquery-1.8.0.min.js}'></script></head><body><h2>我是添加頁面</h2>請輸入姓名：<input name='name' type='text' /><br><br>請輸入年齡：<input name='age' type='text' /><br><br>請選擇性別：<select name='sex' style='width: 173px'> <option value='男'>男</option> <option value='女'>女</option> </select><br><br><button onclick='goadd()' name='sub' id='sub'>添加</button><button name='button' onclick='javascript:history.back(-1);'>返回</button></body><script> function goadd() { var name = $('#name').val(); var age = $('#age').val(); var sex = $('#sex').val(); $.post('/addUser',{name:name,age:age,sex:sex},function (res) { if (res==true){ alert('添加成功') window.location.href ='http://www.hdgsjgj.cn/index'; }else { alert('添加失敗，請檢查數據重試！'); } }) }</script></html>

3.updateUser.html

<!DOCTYPE html><html lang='en' xmlns:th='http://www.thymeleaf.org'><head> <meta charset='UTF-8'> <title>修改用戶</title> <script th:src='http://www.hdgsjgj.cn/bcjs/@{/js/jquery-1.8.0.min.js}'></script></head><body><h2>這是修改頁面</h2><input type='hidden' th:value='${user.id}'><br><br>請輸入姓名：<input th:value='${user.name}'/><br><br>請輸入年齡：<input th:value='${user.age}'/><br><br>請選擇性別：<select style='width: 173px'> <option value='男'>男</option> <option value='女'>女</option> </select><br><br><button onclick='goupdate()'>修改</button> <button name='button' onclick='javascript:history.back(-1);'>返回</button></body><script> function goupdate() { var id=$('#id').val(); var name = $('#name').val(); var age = $('#age').val(); var sex = $('#sex').val(); $.post('/update',{id:id,name:name,age:age,sex:sex},function (res) { if (res==true) { alert('修改成功'); window.location.href='http://www.hdgsjgj.cn/index' rel='external nofollow' rel='external nofollow' ; }else { alert('修改失敗，請檢查數據重試！'); } }) }</script></html>

4.controller中代碼

@RequestMapping('/goadd')//去添加頁面public String goadd(){ return 'user/addUser';}@RequestMapping('/addUser')//添加信息@ResponseBodypublic boolean addUser(UserInfo user){ int i = ud.adduser(user); if (i>0){ return true; }else { return false; }}@RequestMapping('/goupdate/{id}')//去修改頁面，回顯數據public String goupdate(@PathVariable('id') int id,Model model){ UserInfo user = ud.findByid(id); model.addAttribute('user',user); return 'user/updateUser';}@RequestMapping('/update')//修改@ResponseBodypublic boolean updateUser(UserInfo user){ int i = ud.updateUser(user); if (i>0){ return true; }else { return false; }}@RequestMapping('/godel/{id}')//刪除public String delUser(@PathVariable('id') Integer id){ ud.delUser(id); return 'public/success';}

5.完整controller代碼

package com.jz.table.controller;import com.jz.table.dao.AdminDao;import com.jz.table.dao.UserDao;import com.jz.table.entity.Admin;import com.jz.table.entity.UserInfo;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;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;@Controllerpublic class TestController { @Resource private AdminDao ad; @Resource private UserDao ud; @RequestMapping('/login')//主頁 public String index(){ return 'login'; } @RequestMapping('/goregister')//去注冊頁面 public String goregister(){ return 'register'; } @RequestMapping('/register')//注冊 @ResponseBody public boolean register(Admin admin){ int i = ad.addAdmin(admin); if (i>0){ return true; }else { return false; } } @RequestMapping('/gologin')//登錄獲取用戶信息存到seccion public String gologin(Admin admin,HttpServletRequest request,Model model){ Admin aa = ad.login(admin); if (aa==null){ return 'public/false'; } HttpSession session = request.getSession(); session.setAttribute('aname',admin.getName()); session.setAttribute('apassword',admin.getPassword()); List<UserInfo> userlist = ud.findall(); model.addAttribute('admin',aa); model.addAttribute('alist',userlist); return 'user/index'; } @RequestMapping('/index')//從其他頁面操作后返回列表頁面（重復登錄） public String login(Admin admin,Model model,HttpServletRequest request){ HttpSession session = request.getSession(); admin.setName((String) session.getAttribute('aname')); admin.setPassword((Integer) session.getAttribute('apassword')); Admin aa = ad.login(admin); List<UserInfo> userlist = ud.findall(); model.addAttribute('admin',aa); model.addAttribute('alist',userlist); return 'user/index'; } @RequestMapping('/goadd')//去添加頁面 public String goadd(){ return 'user/addUser'; } @RequestMapping('/addUser')//添加信息 @ResponseBody public boolean addUser(UserInfo user){ int i = ud.adduser(user); if (i>0){ return true; }else { return false; } } @RequestMapping('/goupdate/{id}')//去修改頁面，回顯數據 public String goupdate(@PathVariable('id') int id,Model model){ UserInfo user = ud.findByid(id); model.addAttribute('user',user); return 'user/updateUser'; } @RequestMapping('/update')//修改 @ResponseBody public boolean updateUser(UserInfo user){ int i = ud.updateUser(user); if (i>0){ return true; }else { return false; } } @RequestMapping('/godel/{id}')//刪除 public String delUser(@PathVariable('id') Integer id){ ud.delUser(id); return 'public/success'; } }

效果如圖

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