springboot+mybatisplus读写分离小demo

1.数据库主从同步配置可参考https://blog.csdn.net/YYpawn/article/details/87808107

2.引入依赖

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.mysql</groupId>
    <artifactId>masterslave</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>masterslave</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- mybatis-plus begin -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatisplus-spring-boot-starter</artifactId>
            <version>1.0.5</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>2.1.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- mybatis-plus end -->
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.34</version>
            <scope>runtime</scope>
        </dependency>
        <!-- 模板引擎 -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!--主从配置依赖-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>2.4.2</version>
        </dependency>
        <!--主从end-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3.数据库配置

server:
  port: 8555
spring:
  datasource:
    dynamic:
      primary: master
      datasource:
        master:
          username: root
          password: root
          driver-class-name: com.mysql.jdbc.Driver
          url: jdbc:mysql://192.168.0.252:3306/istest?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
        slave_1:
          username: root
          password: root
          driver-class-name: com.mysql.jdbc.Driver
          url: jdbc:mysql://192.168.0.65:3306/istest?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
logging:
  config: classpath:logback-spring.xml
  level:
    root: debug
mybatis-plus:
  mapper-locations: classpath:/mapper/*.xml
  typeAliasesPackage: com.mysql.masterslave.model.entity

4.mybatisplus配置

5.编写测试类

6.测试,访问localhost:8555/user/add,主库从库都写入数据，控制台显示

访问查询接口,localhost:8555/user/list,控制台显示

扫描二维码关注公众号，回复： 6653385 查看本文章

此过程中关键引入dynamic-datasource-spring-boot-starter 依赖，在service使用@RS()注解，不传参默认使用主库,@DS("slave_1")使用slave_1库。

demo地址: https://github.com/YYpawns/springboot-mybatis.git