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话不多说，一个小小登录注册的案例向你展示SpringBoot的魅力

1 设计数据库

1.1表结构

1.2属性

id自增主键，name非空约束，唯一约束，password

2 IDEA配置

2.1 pom文件

       
    
     org.springframework.boot
        
    
     spring-boot-starter-web
    
    
           
    
     org.springframework.boot
            
    
     spring-boot-starter-thymeleaf
        
       
           
    
     com.alibaba
            
    
     druid
            
    
     1.1.14
        
       
           
    
     mysql
            
    
     mysql-connector-java
            
    
     5.1.39
        
       
           
    
     org.mybatis.spring.boot
            
    
     mybatis-spring-boot-starter
            
    
     1.2.0
        
   
       
            
     
      src/main/java
             
                 
      
       **/*.xml
                  
         
    
   

2.2 yml文件配置

spring:  datasource:    driver-class-name: com.mysql.jdbc.Driver    type: com.alibaba.druid.pool.DruidDataSource    url:jdbc:mysql://localhost:3306/user?characterEncoding=utf8&useUnicode=true    username: root    password: 1234mvc:  static-path-pattern: /static/**  #配置静态路径mybatis:  type-aliases-package: day2.demo.test.bean  mapper-locations: classpath:day2/demo/test/mapper/*.xml

3 bean层

3.1 项目结构

3.2 user实体类

package day2.demo.test.bean;public class User {    private int id;    private String name;    private String password;    public  User(){    }    public User(int id, String name, String password) {        this.id = id;        this.name = name;        this.password = password;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @Override    public String toString() {        return "User{" +                "id=" + id +                ", name='" + name + '\'' +                ", password='" + password + '\'' +                '}';    }}

4 mapper层

4.1 usermapper

package day2.demo.test.mapper;import day2.demo.test.bean.User;import org.apache.ibatis.annotations.Mapper;@Mapperpublic interface UserMapper {    public User selectUserById(int id);    public User selectUserByName(String name);    public int insertUser(User user);}

4.2 usermapper.xml

   
       
            SELECT * from u where id = #{id}        
            SELECT * from u where NAME = #{NAME}        
    
             insert into  u(name,password) values(#{name},#{password})    
    
   

5 service层

package day2.demo.test.service;import day2.demo.test.bean.User;import day2.demo.test.mapper.UserMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;@Servicepublic class UserService {    @Autowired    UserMapper userMapper;    public User selectUserById(int id){        return userMapper.selectUserById(id);    }    public boolean login(User user){        String name = user.getName();        String password = user.getPassword();        User u1 =  userMapper.selectUserByName(name);        if(u1==null){            return false;        }else{            if(u1.getPassword().equals(password)){                return true;            }else{                return false;            }        }    }    public boolean zhuCe(User user){        int x = userMapper.insertUser(user);        if(x>0){            return true;        }else {            return false;        }    }}

6 controller层

package day2.demo.test.controller;import com.sun.deploy.net.HttpResponse;import day2.demo.test.bean.User;import day2.demo.test.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.HttpRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@Controllerpublic class UserController {    @Autowired    UserService userService; //-----------------------------登录注册功能    //登录：    @RequestMapping("/Login")    public String login(){        return "Login";    }    @GetMapping("/result")    public String result(HttpServletRequest req, HttpServletResponse resp){        String username = req.getParameter("username");        String password = req.getParameter("password");        User user = new User();        user.setName(username);        user.setPassword(password);        boolean flag = userService.login(user);        if(flag==true){            return "Success";        }else {            return "Middle";        }    }    @GetMapping("/middle")    public String middle(){        return "Login";    }    //注册：    @GetMapping("/zhuCe")    public String zhuCe(){        return "ZhuCe";    }    @GetMapping("/end")    public String end(HttpServletRequest req, HttpServletResponse resp){        String username = req.getParameter("username");        String password = req.getParameter("password");        User user = new User();        user.setName(username);        user.setPassword(password);        boolean flag = userService.zhuCe(user);        if(flag==true){            return "End1";        }else{            return "End2";        }    }}

7 html页面

7.1 login页面

    
          
       
           
   
    
    
        
     
                  
       
                        
用户名：
                        
                   
                   
                        
 密码： 
                        
                   
              
     
        
         
    
    
    
        
         
    
   

7.2 middle页面

    
       
                   
登录失败,还有5秒跳转回登录界面
   
   

7.3 success页面

    
           
登录成功

7.4 zhuce页面

    
           
           
   
    
    
             
      
                   
 用户名：
                   
              
              
                   
                密码：            
                   
              
              
                   
                   
              
         
    
   

7.5 end1页面

    
                   
注册成功,还有5秒跳转回登录界面

7.6 end2页面

    
                   
注册失败,还有5秒跳转回登录界面

大功告成，哈哈

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