Spring Boot整合MyBatis-Flex

news2024/10/2 22:16:10

说明：MyBatis-Flex（官网地址：https://mybatis-flex.com/），是一款数据访问层框架，可实现项目中对数据库的访问，类比MyBatis-Plus。本文介绍，在Spring Boot项目整合MyBatis-Flex。

创建项目

首先，创建一个Spring boot项目，pom.xml文件内容如下

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.12</version>
        <relativePath/>
    </parent>

    <groupId>com.hezy</groupId>
    <artifactId>mybatis-flex-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>Archetype - mybatis-flex-demo</name>
    <url>http://maven.apache.org</url>

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

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.8</version>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.7.1</version>
        </dependency>

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

</project>

创建一个实体类对象，User，如下：

import lombok.Data;

import java.io.Serializable;

@Data
public class User implements Serializable {

    private static final long serialVersionUID = 1L;
    
    private Long id;
    
    private String username;

    private String password;
}

创建一个接口，如下：

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }
}

application.yml，配置文件如下：

server:
  port: 8080

spring:
  datasource:
    driver-class-name: org.postgresql.Driver
    url: jdbc:postgresql://localhost:5432/demo
    username: postgres
    password: 123456

启动项目，测试，没得问题

在这里插入图片描述

整合MyBatis-Flex

引入下面这两个依赖；

	<dependency>
	    <groupId>com.mybatis-flex</groupId>
	    <artifactId>mybatis-flex-spring-boot-starter</artifactId>
	    <version>1.9.3</version>
	</dependency>
	<dependency>
	    <groupId>com.mybatis-flex</groupId>
	    <artifactId>mybatis-flex-processor</artifactId>
	    <version>1.9.3</version>
	    <scope>provided</scope>
	</dependency>

在实体类上关联表，包括实体类对应的表名，以及对应的字段，像主键、别名（如果有）等；

import com.mybatisflex.annotation.Id;
import com.mybatisflex.annotation.Table;
import lombok.Data;

import java.io.Serializable;

@Data
@Table("tb_user")
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private Long id;

    private String username;

    private String password;
}

创建数据访问层对象，可继承MyBatis-Flex提供的接口，并指定泛型为当前操作的实体类对象

import com.hezy.pojo.User;
import com.mybatisflex.core.BaseMapper;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

创建一个接口，根据ID查询User，可直接调用MyBatis-Flex提供的相关API，如下：

    @Autowired
    private UserMapper userMapper;
    
    @GetMapping("/getUser/{id}")
    public User getUserById(@PathVariable("id") Integer id) {
        return userMapper.selectOneById(id);
    }