Springboot演示小Demo

模拟数据库演示springboot小测试

1、编写一个实体类：user

package com.wisezone.test;

import java.io.Serializable;

public class User implements Serializable {
    
    private Integer userId;//用户id
    private String userName;//用户名
    private String age;//用户年龄
    private String address;//用户地址
    
    public Integer getUserId() {
        return userId;
    }
    public void setUserId(Integer userId) {
        this.userId = userId;
    }
    
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }

}

2、编写一个dao：userDao

package com.wisezone.test;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Repository;

@Repository
public class UserDao {
    private static final Logger logger = LoggerFactory.getLogger(UserDao.class);
    
    public User findUser(String userName) {
        logger.info("根据用户名查询：{}",userName);
        User user = new User();
        user.setUserId(10);
        user.setUserName("上海上海");
        user.setAge("20");
        user.setAddress("上海市浦东新区上浦路888弄888号888室");
        return user;
    }
}

3、编写一个service：userService

package com.wisezone.test;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
    
    @Autowired
    private UserDao userDao;
    
    public User findUserByUserName(String userName) {
        return userDao.findUser(userName);
    }
}

4、编写一个controller：userController

package com.wisezone.test;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;


@RequestMapping("user")
@Controller
public class UserController
{
    @Autowired
    private UserService userService;
    
    @RequestMapping("find")
    @ResponseBody
    public User findUser(String userName) {
        
        return userService.findUserByUserName(userName);
    }
}

5、main方法测试

package com.wisezone.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Console：

浏览器：http://localhost:8080/user/find/?userName=hello