Springboot，Mybatis-Plus，shardingjdbc实现单列分库，多租户整合_springboot+mybatis-plus整合sharding-jdbc sql改造-优快云博客

本文链接：https://blog.youkuaiyun.com/Man20161217/article/details/95191477

本文介绍了如何在Springboot项目中结合Mybatis-Plus和Shardingjdbc实现单列分库以及多租户功能。首先，查阅了Shardingsphere和Mybatis-Plus的官方文档，然后新建Maven项目并添加相关依赖。接着，展示了项目目录结构和application.yml配置。在服务、Mapper和Entity代码中，利用Mybatis-Plus自动生成。在配置方面，需要注意数据源冲突问题，并自定义获取租户ID的方法。最后，讨论了MybatisPlusConfig和MybatisPlusAutoConfiguration的配置细节，以及表的分库情况。

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https://baomidou.gitee.io/mybatis-plus-doc/#/tenant

https://gitee.com/baomidou/mybatisplus-spring-boot/blob/master/src/main/java/com/baomidou/springboot/config/MybatisPlusConfig.java

2，新建Maven项目，添加相关依赖

<?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>2.1.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sharding-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <sharding-sphere.version>3.1.0</sharding-sphere.version>
        <druid.version>1.1.12</druid.version>
        <mybatis-plus.version>3.1.2</mybatis-plus.version>
        <fastjson.version>1.2.58</fastjson.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <scope>compile</scope>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>io.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
            <version>${sharding-sphere.version}</version>
        </dependency>
        <dependency>
            <groupId>io.shardingsphere</groupId>
            <artifactId>sharding-transaction-spring-boot-starter</artifactId>
            <version>${sharding-sphere.version}</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.1.8.RELEASE</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

</project>

3，目录结构

4，application.yml

server:
  port: 9999

sharding:
  jdbc:
    datasource:
      names: ds0,ds1
      ds0:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://127.0.0.1:3306/sharding_test_0?useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT%2B8
        username: root
        password: even
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
      ds1:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://127.0.0.1:3306/sharding_test_1?useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT%2B8
        username: root
        password: even
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false