本文重在实现理解，过滤器，业务，逻辑需求，样式请无视。。

项目结构如下

1.idea新建Spring boot项目，在pom中加上thymeleaf和mybatis支持。pom.xml代码如下

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://.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")//主页 public String index(){ return "login"; } @RequestMapping("/goregister")//去注册页面 public String goregister(){ return "register"; } @RequestMapping("/register")//注册 @ResponseBody public boolean register(Admin admin){ int i = ad.addAdmin(admin); if (i>0){ return true; }else { return false; } } @RequestMapping("/gologin")//登录获取用户信息存到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")//从其他页面操作后返回列表页面（重复登录） 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")//去添加页面 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}")//去修改页面，回显数据 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}")//删除 public String delUser(@PathVariable("id") Integer id){ ud.delUser(id); return "public/success"; } }

效果如图

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