0103水平分片-jdbc-shardingsphere-中间件

在使用ShardingSphere进行数据库分片时，可以通过其提供的JDBC接口来操作分片的数据库。以下是一个简单的示例，展示了如何配置ShardingSphere来进行水平分片，并通过JDBC操作数据。

1. 添加ShardingSphere依赖到项目的pom.xml中：

<dependency>
    <groupId>org.apache.shardingsphere</groupId>
    <artifactId>shardingsphere-jdbc-core-spring-boot-starter</artifactId>
    <version>您的ShardingSphere版本</version>
</dependency>

2. 在application.yml或application.properties中配置ShardingSphere的数据源和分片规则：

spring.shardingsphere.datasource.names: ds0,ds1
spring.shardingsphere.datasource.ds0.type: com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds0.driver-class-name: com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.ds0.jdbc-url: jdbc:mysql://localhost:3306/ds0
spring.shardingsphere.datasource.ds0.username: root
spring.shardingsphere.datasource.ds0.password: 
spring.shardingsphere.datasource.ds1.type: com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds1.driver-class-name: com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.ds1.jdbc-url: jdbc:mysql://localhost:3306/ds1
spring.shardingsphere.datasource.ds1.username: root
spring.shardingsphere.datasource.ds1.password: 
 
spring.shardingsphere.sharding.tables.t_order.actual-data-nodes: ds$->{0..1}.t_order_$->{0..1}
spring.shardingsphere.sharding.tables.t_order.table-strategy.inline.sharding-column: order_id
spring.shardingsphere.sharding.tables.t_order.table-strategy.inline.algorithm-expression: t_order_$->{order_id % 2}
spring.shardingsphere.sharding.tables.t_order.key-generator-column-name: order_id

3. 使用ShardingSphere提供的JDBC接口进行操作：

import org.apache.shardingsphere.infra.config.properties.ConfigurationProperties;
import org.apache.shardingsphere.infra.context.metadata.MetaDataContexts;
import org.apache.shardingsphere.infra.context.runtime.RuntimeContext;
import org.apache.shardingsphere.infra.database.DefaultSchema;
import org.apache.shardingsphere.infra.executor.kernel.ExecutorEngine;
import org.apache.shardingsphere.infra.metadata.ShardingSphereMetaData;
import org.apache.shardingsphere.infra.optimize.context.OptimizerContext;
import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
import org.apache.shardingsphere.mode.manager.ContextManager;
import org.apache.shardingsphere.mode.metadata.MetaDataContextsBuilder;
import org.apache.shardingsphere.transaction.context.TransactionContexts;
 
import javax.sql.Data