SpringBoot整合MyBatis

一、准备工作

1、建表语句，使用MySQL5.7.28

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user` (
  `ID` int(11) NOT NULL AUTO_INCREMENT COMMENT '序号',
  `USER_NAME` varchar(32) DEFAULT NULL COMMENT '用户名',
  `PASSWORD` varchar(32) DEFAULT NULL COMMENT '密码',
  `ROLES` varchar(255) DEFAULT NULL COMMENT '角色信息',
  PRIMARY KEY (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of t_user
-- ----------------------------
INSERT INTO `t_user` VALUES ('1', 'zhangsan', '123456', 'admin,user');

2、导入pom.xml依赖

MyBatis对SpringBoot的支持

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.1</version>
</dependency>

MySQL驱动程序

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.20</version>
</dependency>

3、连接配置，建议使用application.yml

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

二、整合MyBatis（注解）

1、新建实体类

@Data
@AllArgsConstructor
public class User {
    private String id;
    private String userName;
    private String password;
    private String roles;
}

2、新建映射接口

@Mapper
public interface UserMapper {
    @Select("SELECT * FROM t_user WHERE USER_NAME = #{name}")
    User getUserByName(String name);
}

3、测试

@SpringBootTest
class WmsMainApplicationTests {

    @Autowired
    private UserMapper userMapper;

    @Test
    void getUserByName() {
        String name = "zhangsan";
        User user = userMapper.getUserByName(name);
        System.out.println(user);
    }
}

4、输出

 可在配置文件中开启sql语句显示

logging:
  level:
　　#指定包名
    springbootwms: debug