shardingsphere实现分库_shardingsphere 分库

实验环境

springboot版本：2.2.2.RELEASE

shardingsphere版本：4.0.0-RC3

实验说明：

数据库：demo_ds_0，demo_ds_1

表user,分别在demo_ds_0，demo_ds_1各自建一张user表

CREATE TABLE `user` (
  `id` bigint(255) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `uid` varchar(255) DEFAULT NULL,
  `school` varchar(255) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
)

第一步：引入shardingsphere依赖

 <dependency>
    <groupId>org.apache.shardingsphere</groupId>
    <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
    <version>4.0.0-RC3</version>
</dependency>
 
        <!-- for spring namespace -->
<dependency>
    <groupId>org.apache.shardingsphere</groupId>
    <artifactId>sharding-jdbc-spring-namespace</artifactId>
    <version>4.0.0-RC3</version>
</dependency>

第二步：application.properties配置

debug=false
server.port=8081
server.servlet.context-path=
spring.jackson.serialization.INDENT_OUTPUT=true
spring.profiles.active=
 
spring.shardingsphere.props.sql.show=true
spring.shardingsphere.datasource.names=ds-0,ds-1
 
spring.shardingsphere.datasource.ds-0.type=com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds-0.driver-class-name=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.ds-0.jdbc-url=jdbc:mysql://youraddress:3306/demo_ds_0
spring.shardingsphere.datasource.ds-0.username=
spring.shardingsphere.datasource.ds-0.password=
 
spring.shardingsphere.datasource.ds-1.type=com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds-1.driver-class-name=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.ds-1.jdbc-url=jdbc:mysql://youraddress:3306/demo_ds_1
spring.shardingsphere.datasource.ds-1.username=
spring.shardingsphere.datasource.ds-1.password=
 
spring.shardingsphere.sharding.default-database-strategy.inline.sharding-column=age
spring.shardingsphere.sharding.default-database-strategy.inline.algorithm-expression=ds-$->{age % 2}
 
spring.shardingsphere.sharding.tables.user.actual-data-nodes=ds-$->{0..1}.user
spring.shardingsphere.sharding.tables.user.key-generator.column=id
 
spring.shardingsphere.sharding.tables.user.key-generator.type=SNOWFLAKE
spring.shardingsphere.sharding.tables.user.key-generator.props.worker.id=123

第三步：验证

1.通过代码，插入一条数据，age=1,发现数据保存在demo_ds_1的user表中

2.通过代码，插入一条数据，age=2,发现数据保存在demo_ds_0的user表中

3.通过代码，插入一条数据，age=3,发现数据保存在demo_ds_0的user表中

4通过代码查询，发现查询出三条记录，到此验证完毕。