SpringBoot 使用JDBC 连接 Mysql 数据库

一、创建

1、File→New→Project→Spring Initializr

二、编写

1、项目结构如下

2、创建 User 类

package com.example.mysql.pojo;

import org.springframework.data.annotation.Id;
import org.springframework.data.relational.core.mapping.Table;

@Table("student")
public class User {
    @Id
    private Integer id;
    private String name;
    private Integer age;

    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;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" +id +
                ", name='" + name + '\'' +
                ", age='" + age + '\'' +
                '}';

    }
}

3、创建 UserRepository 接口

package com.example.mysql.dao;

import com.example.mysql.pojo.User;
import org.springframework.data.repository.CrudRepository;

public interface UserRepository extends CrudRepository<User, Integer> {
}

4、创建 MysqlController 类

package com.example.mysql.Controller;

import com.example.mysql.dao.UserRepository;
import com.example.mysql.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;

@RestController
public class MysqlController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping("/users")
    public List<User> findAll() {
        List<User> result = new ArrayList<>();
        userRepository.findAll().forEach((user) -> {
            result.add(user);
        });

        return result;
    }
}

5、创建 application.yml

server:
  port: 8082
spring:
  datasource:
    driverClassName: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://192.168.2.109:3306/school?useUnicode=true&zeroDateTimeBehavior=convertToNull&autoReconnect=true&characterEncoding=utf-8
    username: root
    password: Abc@123456

三、数据库

创建数据库，连接地址：

四、访问