MyBatis在SpringBoot2中的Spring Cloud Config配置中心集成

在Spring Boot 2中集成MyBatis和Spring Cloud Config配置中心，可以按照以下步骤进行操作：

1. 添加依赖

首先，在你的pom.xml文件中添加必要的依赖：

<dependencies>
    <!-- Spring Boot Starter Web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- Spring Boot Starter MyBatis -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mybatis</artifactId>
    </dependency>

    <!-- Spring Boot Starter Data JPA -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <!-- Spring Cloud Config Client -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>

    <!-- H2 Database (or any other database you are using) -->
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>

    <!-- Other dependencies -->
</dependencies>

2. 配置Spring Cloud Config Client

在你的application.yml或application.properties文件中配置Spring Cloud Config Client：

spring:
  application:
    name: my-service
  cloud:
    config:
      uri: http://localhost:8888
      username: config-client
      password: config-client

3. 配置MyBatis

在你的application.yml或application.properties文件中配置MyBatis：

mybatis:
  type-aliases-package: com.example.demo.entity
  mapper-locations: classpath:mapper/*.xml

4. 创建实体类

创建一个简单的实体类，例如User：

package com.example.demo.entity;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private Integer age;

    // Getters and Setters
}

5. 创建Mapper接口

创建一个MyBatis的Mapper接口：

package com.example.demo.mapper;

import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface UserMapper {
    @Select("SELECT * FROM users")
    List<User> findAll();
}

6. 创建Service层

创建一个Service层来调用Mapper接口：

package com.example.demo.service;

import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;

    public List<User> findAll() {
        return userMapper.findAll();
    }
}

7. 创建Controller层

创建一个Controller层来提供API接口：

package com.example.demo.controller;

import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping("/users")
    public List<User> findAll() {
        return userService.findAll();
    }
}

8. 启动类

创建一个Spring Boot启动类：

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

9. 配置中心配置

确保你的Spring Cloud Config Server正在运行，并且配置中心的URL是正确的。你可以通过访问http://localhost:8888/config-repo/application/default.yml来验证配置是否正确加载。

总结

通过以上步骤，你已经成功地在Spring Boot 2中集成了MyBatis和Spring Cloud Config配置中心。这样，你的应用程序就可以从配置中心动态加载配置，并且可以使用MyBatis进行数据库操作。