springboot集成shardingsphere-分库分表

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导入maven依赖，如下

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope><exclusions><exclusion><groupId>org.junit.vintage</groupId><artifactId>junit-vintage-engine</artifactId></exclusion></exclusions></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency><!-- https://mvnrepository.com/artifact/org.apache.shardingsphere/shardingsphere-jdbc-core-spring-boot-starter --><dependency><groupId>org.apache.shardingsphere</groupId><artifactId>sharding-jdbc-spring-boot-starter</artifactId><version>4.1.1</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.11</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.1.1</version></dependency>

新建实体表

这个表只有两个字段，其中id不要弄成自增长的。
总共有四张表，存于两个数据库中，如下展示：

这样子就形成了对course进行分库分表了，两个数据库源，每个数据库源有两张表。
配置yml文件

spring:application:name: shardingdemoshardingsphere:datasource:names: master1, master2master1:type: com.zaxxer.hikari.HikariDataSourcedriver-class-name: com.mysql.cj.jdbc.Driverjdbc-url: jdbc:mysql://xxxxxx:3306/mybatis?useUnicode=true&characterEncoding=utf8&verifyServerCertificate=false&useSSL=trueusername: xxxxpassword: xxxxmaster2:type: com.zaxxer.hikari.HikariDataSourcedriver-class-name: com.mysql.cj.jdbc.Driverjdbc-url: jdbc:mysql://xxxx:3306/db2019?useUnicode=true&characterEncoding=utf8&verifyServerCertificate=false&useSSL=trueusername: xxxxpassword: xxxxx
# 配置虚拟表映射sharding:tables:course:actualDataNodes: master$->{1..2}.course_$->{1..2}databaseStrategy:inline:shardingColumn: idalgorithmExpression: master$->{id%2+1}tableStrategy:inline:shardingColumn: idalgorithmExpression: course_$->{id%2+1}keyGenerator:column: idtype: SNOWFLAKEprops:worker:id: 1props:sql.show: true

其中新建了两个数据源，master1映射mybatis这个数据库，而master2映射db2019这个数据库。最后根据id的取模运算，得出，插入的新数据往哪个数据库的哪个表插入。

进行数据库操作

    @Autowiredprivate CourseMapper courseMapper;@Testpublic void insertDatabaseAndTableShardingTest() {for (int i = 0; i < 20; i++) {Course course = new Course();course.setName("分库分表插入" + i);courseMapper.insert(course);}}