mybatis-flex与springBoot整合

mybatis-flex基本使用

- 1.测试sql
- 2.导入坐标
- 3.框架搭建
- - 1.pojo层
  - 2.mapper层
  - 3.service层
  - 4.controller层
  - 5.启动类
  - 6.配置类
  - 7.EmpMapper.xml
- 4.启动测试

本片文章在springBoot3，jdk21下测试通过

注意官方网站为：https://mybatis-flex.com/
请点击：直达网站

1.测试sql

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- 员工表
DROP TABLE IF EXISTS `emp`;
CREATE TABLE `emp`  (
  `id` bigint NOT NULL,
  `ename` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `age` int NULL DEFAULT NULL,
  `dept_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC;

INSERT INTO `emp` VALUES (1, '乔峰', 10, '1001');
INSERT INTO `emp` VALUES (2, '段誉', 21, '1001');
INSERT INTO `emp` VALUES (3, '虚竹', 23, '1001');
INSERT INTO `emp` VALUES (4, '阿紫', 18, '1001');
INSERT INTO `emp` VALUES (5, '扫地僧', 85, '1002');
INSERT INTO `emp` VALUES (6, '李秋水', 33, '1002');
INSERT INTO `emp` VALUES (7, '鸠摩智', 50, '1002');
INSERT INTO `emp` VALUES (8, '天山童姥', 60, '1003');
INSERT INTO `emp` VALUES (9, '慕容博', 58, '1003');
INSERT INTO `emp` VALUES (10, '丁春秋', 71, '1005');

SET FOREIGN_KEY_CHECKS = 1;

-- 部门表
DROP TABLE IF EXISTS `dept`;
CREATE TABLE `dept`  (
  `dept_no` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL,
  `name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = DYNAMIC;

INSERT INTO `dept` VALUES ('1001', '研发部');
INSERT INTO `dept` VALUES ('1002', '销售部');
INSERT INTO `dept` VALUES ('1003', '财务部');
INSERT INTO `dept` VALUES ('1004', '人事部');

SET FOREIGN_KEY_CHECKS = 1;

2.导入坐标

<?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>com.andy</groupId>
    <artifactId>myBatis-Flex_boot3</artifactId>
    <version>1.0-SNAPSHOT</version>
    <!-- 父坐标 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.1</version>
        <relativePath/>
    </parent>
    <properties>
        <maven.compiler.source>21</maven.compiler.source>
        <maven.compiler.target>21</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- spring数据坐标 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- mybatis-flex -->
        <dependency>
            <groupId>com.mybatis-flex</groupId>
            <artifactId>mybatis-flex-spring-boot-starter</artifactId>
            <version>1.7.6</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis-spring</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- mybatis与spring合成 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>com.mybatis-flex</groupId>
            <artifactId>mybatis-flex-processor</artifactId>
            <version>1.7.6</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>
    </dependencies>
</project>

3.框架搭建

这里只搭建emp表的，dept表的框架各位博主可以自行尝试搭建

1.pojo层

1.flex同样也支持AR模式(Active Record)，使用 Active Record 功能时，项目中必须注入对应实体类的 BaseMapper 对象。用过mybatis-plus的博主都知道这一点

2.使用方式与mybatis-plus相同，只需让 Entity 类继承 Model 即可

3.注解

@Table：与mybatis-plus的@TableName作用相同
@Id(keyType = KeyType.Auto)：与mybatis-plus的 @TableId(value = “id”, type = IdType.AUTO)相同
@Column 用来对字段进行更多的配置源码如下：

public @interface Column {

    /**
     * 字段名称
     */
    String value() default "";

    /**
     * 是否忽略该字段，可能只是业务字段，而非数据库对应字段
     */
    boolean ignore() default false;

    /**
     * insert 的时候默认值，这个值会直接被拼接到 sql 而不通过参数设置
     */
    String onInsertValue() default "";

    /**
     * update 的时候自动赋值，这个值会直接被拼接到 sql 而不通过参数设置
     */
    String onUpdateValue() default "";

    /**
     * 是否是大字段，大字段 APT 不会生成到 DEFAULT_COLUMNS 里
     */
    boolean isLarge() default false;

    /**
     * 是否是逻辑删除字段，一张表中只能存在 1 一个逻辑删除字段
     * 逻辑删除的字段，被删除时，会设置为 1，正常状态为 0
     */
    boolean isLogicDelete() default false;

    /**
     * 是否为乐观锁字段，若是乐观锁字段的话，数据更新的时候会去检测当前版本号，若更新成功的话会设置当前版本号 +1
     * 只能用于数值的字段
     */
    boolean version() default false;

    /**
     * 配置的 jdbcType
     */
    JdbcType jdbcType() default JdbcType.UNDEFINED;

    /**
     * 自定义 TypeHandler
     */
    Class<? extends TypeHandler> typeHandler() default UnknownTypeHandler.class;

}

4.pojo层代码

@Table(value = "emp")
public class Emp extends Model<Emp> {

    @Id(keyType = KeyType.Auto)
    private  Long id;

    private String ename;

    private Integer age;

    private String deptId;
    
    // getter/setter/toString...

2.mapper层

这里和mybatis-plus的mapper层一样

@Mapper
public interface EmpMapper extends BaseMapper<Emp> {

}

3.service层

这里和mybatis-plus一样

1.service层接口

public interface EmpService extends IService<Emp> {

}

2.实现类接口

@Service
@Transactional
public class EmpServiceImpl extends ServiceImpl<EmpMapper,Emp> implements EmpService {
    
}

4.controller层

这里和mybatis-plus一样

@RestController
@RequestMapping("/emp")
public class EmpController {

    @Resource
    private EmpService empService;

    @GetMapping("/findById")
    public Emp findById(@RequestParam("id") Long id){
        return empService.getById(id);
    }
}

5.启动类

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

6.配置类

#设置数据源
spring:
  datasource:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://127.0.0.1:3306/study_test?characterEncoding=utf-8&allowMultiQueries=true&zeroDateTimeBehavior=convertToNull&useSSL=false
      username: root
      password: root

7.EmpMapper.xml

<?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.andy.mapper.EmpMapper">
    
</mapper>