springboot整合mybatis对数据库交互

首先要配置好MySQL数据库，并且建立af-school数据库。

思路流程是pom文件添加mybatis及mysql数据库驱动依赖--创建application.yml配置文件，并配置数据库参数---建立数据库具体类---建立mybatis接口类--建立数据库操作接口--将数据库操作接口实例化--controller调用数据库实例化类，完成数据库读写。

1、配置pom.xml依赖

        <!--mybatis起步依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>3.0.3</version>
        </dependency>
        <!--mysql驱动依赖-->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>

2、创建application.yml配置文件，配置数据库驱动、url，账号及密码

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://192.168.1.101:3306/af_school
    username: root
    password: a1b2c3

3、在dao包里创建mybatis@Mapper注解接口

@Mapper
public interface StudentMapper {
    @Select("select * from af_school.student")
    public List<Student> findAll();
    @Select("select * from af_school.student where id=#{id}")
    public Student findById(Integer id);
 
}

4、在entity包里创建af_school数据库里的Student类

package com.zw.springboot.springbootmybatis.entity;
 
/** 本类由 POJO生成器 自动生成于 2024-04-26 22:45:56
    作者：阿发你好      官网: http://afanihao.cn 
*/ 
 
/** INSERT语句 ( 预处理方式 ) 
  INSERT INTO `student`
        (`id`, `name`, `sex`, `phone`, `birthday`) 
  VALUES(?, ?, ?, ?, ?) 
*/
 
import java.util.Date;
 
/** INSERT语句 ( MyBatis方式 )
  INSERT INTO `student`
        (`id`, `name`, `sex`, `phone`, `birthday`) 
  VALUES(#{id}, #{name}, #{sex}, #{phone}, #{birthday}) 
  自增主键: 无
*/ 
 
public class Student 
{ 
 
	public Integer id ; 
	public String name ; 
	public Boolean sex ; 
	public String phone ; 
	public Date birthday ;
	public Student(){
 
	}
	public Student(Integer id,String name,Boolean sex,String phone,Date birthday){
		this.id=id;
		this.name=name;
		this.sex=sex;
		this.phone=phone;
		this.birthday=birthday;
	}
 
	public void setId(Integer id)
	{
		this.id=id;
	}
	public Integer getId()
	{
		return this.id;
	}
	public void setName(String name)
	{
		this.name=name;
	}
	public String getName()
	{
		return this.name;
	}
	public void setSex(Boolean sex)
	{
		this.sex=sex;
	}
	public Boolean getSex()
	{
		return this.sex;
	}
	public void setPhone(String phone)
	{
		this.phone=phone;
	}
	public String getPhone()
	{
		return this.phone;
	}
	public void setBirthday(Date birthday)
	{
		this.birthday=birthday;
	}
	public Date getBirthday()
	{
		return this.birthday;
	}
 
} 

5、在service包里创建StudentService接口

public interface StudentService {
    public List<Student> findAll();
    public Student findById(Integer id);
}

6、在service的子包impl里创建StudentService接口的实现类StudentServiceImpl

@Service
public class StudentServiceImpl implements StudentService {
    @Autowired
    private StudentMapper studentMapper;
    @Override
    public List<Student> findAll() {
        return studentMapper.findAll();
    }
 
    @Override
    public Student findById(Integer id) {
        return studentMapper.findById(id);
    }
}

7、在controller包里创建类StudentController，与数据库交互将数据传到web

package com.zw.springboot.springbootmybatis.controller;
 
import com.zw.springboot.springbootmybatis.entity.Student;
import com.zw.springboot.springbootmybatis.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
 
import java.util.List;
 
/**
 * ClassName: StudentController
 * Package: com.zw.springboot.springbootmybatis.controller
 * Description:
 *
 * @Author 唱片
 * @Create 2024/5/4 下午10:44
 * @Version 1.0
 */
@RestController
@ResponseBody
public class StudentController {
    @Autowired
    private StudentService studentService;
 
    @RequestMapping("/findById")
    public Student findById(Integer id) {
        return studentService.findById(id);
    }
 
    @RequestMapping("/findAll")
    public List<Student> findAll() {
        return studentService.findAll();
    }
 
    @RequestMapping("/testStudent")
    public Student testStudent() {
 
        Student student = new Student();
        student.setId(1001);
        student.setName("dddd");
        student.setSex(true);
        student.setPhone("123456789");
        return student;
    }
 
    @RequestMapping("/hello")
    public String hello() {
        return "hello";
    }
}