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创建sharding_sphere数据库

在数据库中创建两张表，t_order_1和t_order_2

分片规则：如果订单编号是偶数添加到t_order_1,如果是奇数添加到t_order_2

创建实体类

public class Order {  private Integer id;  private Integer orderType;  private Integer customerId;  private Double amount;  public Integer getId() {  return id;  }  public void setId(Integer id) {  this.id = id;  }  public Integer getOrderType() {  return orderType;  }  public void setOrderType(Integer orderType) {  this.orderType = orderType;  }  public Integer getCustomerId() {  return customerId;  }  public void setCustomerId(Integer customerId) {  this.customerId = customerId;  }  public Double getAmount() {  return amount;  }  public void setAmount(Double amount) {  this.amount = amount;  }  @Override  public String toString() {  return "Order{" +  "id=" + id +  ", orderType='" + orderType + '\'' +  ", customerId=" + customerId +  ", amount=" + amount +  '}';  }  
}

创建Mapper

@Repository  
@Mapper  
public interface OrderMapper {  @Insert("insert into t_order(order_type,customer_id,amount) values(#{orderType},#{customerId},#{amount})")  public void insert(Order orders);  @Select("select * from t_order where id = #{id}")  @Results({  @Result(property = "id",column = "id"),  @Result(property = "orderType",column = "order_type"),  @Result(property = "customerId",column = "customer_id"),  @Result(property = "amount",column = "amount")  })  public Order selectOne(Integer id);
}    

创建配置文件

spring:  shardingsphere:  datasource: #数据源配置  names: ds1  ds1: #数据源0  type: com.alibaba.druid.pool.DruidDataSource  driver-class-name: com.mysql.cj.jdbc.Driver  url: jdbc:mysql://localhost:3306/ds1?serverTimezone=UTC&useSSL=false  username: root  password: wsrbb  sharding:  tables:  t_order:  actual-data-nodes: ds1.t_order_${1..2}   #指定orders表的分布情况，配置表在哪个数据库中，表名称是什么  # 雪花算法  key-generator:  column: id  type: SNOWFLAKE  props:  worker-id: 123  max-vibration-offset: 3  ##指定分片策略。根据id的奇偶性来判断插入到哪个表  table-strategy:  inline:  sharding-column: id  algorithm-expression: t_order_${id % 2 +1}  #打开sql输出日志  props:  sql:  show: true

运行测试类即可

@Test  
public void addOrders(){  for (int i = 1; i <=10 ; i++) {  Order orders = new Order();  //orders.setId(i);  orders.setCustomerId(new Random().nextInt(10));  orders.setOrderType(i);  orders.setAmount(1000.0*i);  orderMapper.insert(orders);  }  
}