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详解SpringBoot整合MyBatis详细教程

作者:Baret-H

这篇文章主要介绍了详解SpringBoot整合MyBatis详细教程,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧

1. 导入依赖

首先新建一个springboot项目,勾选组件时勾选Spring WebJDBC APIMySQL Driver

然后导入以下整合依赖

<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>2.1.3</version>
</dependency>

2. 连接数据库

数据库代码:

-- 创建数据库
CREATE DATABASE springboot;

-- 使用springboot数据库
use springboot;

-- 创建user表
CREATE TABLE IF NOT EXISTS `user`(
	`id` INT(4) NOT NULL AUTO_INCREMENT COMMENT '身份号',
	`name` VARCHAR(30) NOT NULL DEFAULT '匿名' COMMENT '姓名',
	`pwd` VARCHAR(30) NOT NULL DEFAULT '123456' COMMENT '密码',
	PRIMARY KEY (`id`)
)ENGINE=INNODB DEFAULT CHARSET=utf8

-- 给user表插入数据
INSERT INTO `user`(`id`,`name`,`pwd`) 
VALUES ('1','zsr',000204),('2','gcc',000421),('3','BaretH',200024);

然后IDEA连接数据库

image-20201008203845928

打开我们创建的数据库springboot

image-20201008203924600

对应的user

image-20201008204058928

3. 编写数据库配置信息

在springboot配置文件中配置数据库信息

spring.datasource.username=root
spring.datasource.password=200024
spring.datasource.url=jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

4. 编写pojo实体类

在主程序同级目录下新建pojo包,其中新建User实体类(使用了lombok)

package com.zsr.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
  int id;
  String name;
  String password;
}

5. 编写mapper接口

在主程序同级目录下新建mapper包,其中新建UserMapper接口

image-20201011220718188

package com.zsr.mapper;

import com.zsr.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

@Mapper //表示这是Mybatis的mapper类
@Repository
public interface UserMapper {
  List<User> queryUserList();

  User queryUserByID(int id);

  int addUser(User user);

  int updateUser(User user);

  int deleteUser(int id);
}

6. 编写mapper.xml

在resources目录下新建mabatis包,其中新建mapper包,再在其中新建mapper.xml

image-20201011225616633

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zsr.mapper.UserMapper">
  <select id="queryUserList" resultType="user">
    select * from user
  </select>

  <select id="queryUserByID" resultType="user">
    select * from user where id= #{id}
  </select>

  <insert id="addUser" parameterType="user">
    insert into user(id,name,pwd) values (#{id},#{name},#{pwd})
  </insert>

  <update id="updateUser" parameterType="user">
    update user set name=#{name},pwd=#{pwd} where id=#{id}
  </update>

  <delete id="deleteUser" parameterType="int">
    delete from user where id=#{id}
  </delete>
</mapper>

7. 编写controller

在主程序同级目录下新建controller包,在其中新建UserController

package com.zsr.controller;

import com.zsr.mapper.UserMapper;
import com.zsr.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.List;

@RestController
public class UserController {
  @Autowired
  private UserMapper userMapper;

  @GetMapping("/queryUserList")
  public List<User> queryUserList() {
    List<User> users = userMapper.queryUserList();
    return users;
  }

  @GetMapping("/queryUserByID")
  public User queryUserByID() {
    User user = userMapper.queryUserByID(2);
    return user;
  }

  @GetMapping("/addUser")
  public String addUser() {
    userMapper.addUser(new User(4, "zml", "45632"));
    return "增加用户完毕";
  }

  @GetMapping("/updateUser")
  public String updateUser() {
    userMapper.updateUser(new User(4, "zml", "678910"));
    return "修改用户完毕";
  }

  @GetMapping("/deleteUser")
  public String deleteUser() {
    userMapper.deleteUser(4);
    return "删除用户完毕";
  }
}

8. 测试

测试访问http://localhost:8080/queryUserList

image-20201011232324236

测试访问http://localhost:8080/queryUserByID

image-20201011232404442

测试访问http://localhost:8080/addUser

image-20201011232855926

测试访问http://localhost:8080/updateUser

image-20201011232934604

image-20201011233014935

测试访问http://localhost:8080/deleteUser

image-20201011233046907

image-20201011233112576

到此这篇关于详解SpringBoot整合MyBatis详细教程的文章就介绍到这了,更多相关SpringBoot整合MyBatis内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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