01 springboot整合mybatis-plus实例

最新推荐文章于 2025-06-08 00:14:09 发布

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本文详细介绍了如何将SpringBoot与Mybatis-Plus进行整合，包括实体类的数据库映射、BaseMapper的使用、SpringBoot启动类的配置，以及数据库表数据、坐标文件、配置文件、Java代码和测试文件的设置。通过这些步骤，可以实现快速地在SpringBoot项目中使用Mybatis-Plus进行数据操作。

springboot整合mybatis-plus

实体类添加注解映射数据库表与字段
mapper 文件继承 BaseMapper（封装了SQL）
springboot启动类添加扫描包注解。

数据库表数据

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for tb_user
-- ----------------------------
DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `user_name` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '用户名',
  `password` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '密码',
  `name` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '姓名',
  `age` int(11) NULL DEFAULT NULL COMMENT '年龄',
  `email` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '邮箱',
  `birthday` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 6 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of tb_user
-- ----------------------------
INSERT INTO `tb_user` VALUES (1, 'zhangsan', '123456', '张三', 18, 'test1@itcast.cn', '2019‐09‐26');
INSERT INTO `tb_user` VALUES (2, 'lisi', '123456', '李四', 20, 'test2@itcast.cn', '2019‐10‐01');
INSERT INTO `tb_user` VALUES (3, 'wangwu', '123456', '王五', 28, 'test3@itcast.cn', '2019‐10‐02');
INSERT INTO `tb_user` VALUES (4, 'zhaoliu', '123456', '赵六', 21, 'test4@itcast.cn', '2019‐10‐05');
INSERT INTO `tb_user` VALUES (5, 'sunqi', '123456', '孙七', 24, 'test5@itcast.cn', '2019‐10‐14');

SET FOREIGN_KEY_CHECKS = 1;

坐标文件

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>li.chen.com</groupId>
    <artifactId>springboot_mybatisplus</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--简化代码的工具包-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--mybatis-plus的springboot支持-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
    </dependencies>

</project>

配置文件

application.properties

spring.application.name = mp‐springboot
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/mp
spring.datasource.username=root
spring.datasource.password=root
# Logger Config
logging.level.root: debug

java文件

实体类

package li.chen.com.pojo;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;

import java.util.Date;

 //自动生成对应的get,set方法及构造方法
@TableName("tb_user")  //对应数据库表名
public class User {

    @TableId("id")  //指定主键字段名
    private Long id;

    @TableField("user_name")  //指定对应字段名
    private String userName;

    @TableField("password")
    private String passWord;

    @TableField("name")
    private String name;

    @TableField("age")
    private Integer age;

    @TableField("email")
    private String email;

    @TableField("birthday")
    private String birthday;


}

mapper文件

package li.chen.com.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import li.chen.com.pojo.User;

public interface UserMapper extends BaseMapper<User> {
}

启动类

package li.chen.com;


import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;

@MapperScan("li.chen.com.mapper")
@org.springframework.boot.autoconfigure.SpringBootApplication
public class SpringBootApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootApplication.class,args);
    }
}

测试文件

package li.chen.com.mapper;

import li.chen.com.pojo.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest {

    @Autowired
    UserMapper userMapper;

    @Test
    public void TestSelect(){
        //查询tb_user所有记录
        List<User> users = userMapper.selectList(null);
        System.out.println(users);
    }

}