Mybatis 潦草笔记

news2024/9/24 7:21:07

准备工作（创建springboot工程、数据库表、实体类）
引入Mybatis的相关依赖，配置Mybatis（数据库连接信息）
编写SQL语句（注解/XML）

创建springboot工程

选中两项

MyBatis Framework：Mybatis框架的依赖

MySQL Driver：MySQL的驱动包

代码部分

根据数据库建类

实体类

package com.example.demo;

public class test {
    private String name;
    private String gender;
    private Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public test(String name, String gender, Integer age) {
        this.name = name;
        this.gender = gender;
        this.age = age;
    }

    public test() {
    }
}

接口

package com.example.mapper;

import com.example.demo.test;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface testMappper {
    @Select("select * from student.'table'")
    public List<test> list();
}

配置

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbd:mysql://localhost:3306/student
spring.datasource.username=root
spring.datasource.password=123456

DemoApplicationTests

package com.example.demo;
import com.example.mapper.testMappper;

import jakarta.annotation.Resource;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.List;

@SpringBootTest
class DemoApplicationTests {
    @Autowired(required = false)
    private testMappper testmapper;

    @Test
    public void testList(){
        List<test> t= testmapper.list();
        t.stream().forEach(test -> {
            System.out.println(test);
        });
    }
}