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 {@Resourceprivate 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.Driverurl: jdbc:mysql://127.0.0.1:3306/study_test?characterEncoding=utf-8&allowMultiQueries=true&zeroDateTimeBehavior=convertToNull&useSSL=falseusername: rootpassword: 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>

4.启动测试

测试连接:http://localhost:8080/emp/findById?id=1