Java에서 데이터 샤딩 및 데이터 분리를 구현하는 방법

import java.util.HashMap;
import java.util.Map;

public class DataShardingDemo {
    private Map<Integer, Map<String, String>> dataMap;

    public DataShardingDemo() {
        dataMap = new HashMap<>();
    }

    public void putData(String key, String value) {
        int shard = getShard(key);
        Map<String, String> shardData = dataMap.getOrDefault(shard, new HashMap<>());
        shardData.put(key, value);
        dataMap.put(shard, shardData);
    }

    public String getData(String key) {
        int shard = getShard(key);
        Map<String, String> shardData = dataMap.getOrDefault(shard, new HashMap<>());
        return shardData.get(key);
    }

    private int getShard(String key) {
        // 根据散列函数计算分片
        return key.hashCode() % 3;
    }

    public static void main(String[] args) {
        DataShardingDemo demo = new DataShardingDemo();

        demo.putData("key1", "value1");
        demo.putData("key2", "value2");

        System.out.println(demo.getData("key1"));
        System.out.println(demo.getData("key2"));
    }
}

import javax.persistence.*;

@Entity
@Table(name = "user")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    // 其他属性...

    // Getter和Setter方法...
}

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class DataSeparationDemo {
    public static void main(String[] args) {
        // 初始化Hibernate配置
        Configuration configuration = new Configuration().configure();
        SessionFactory sessionFactory = configuration.buildSessionFactory();

        // 创建Session
        Session session = sessionFactory.openSession();

        // 查询数据
        User user = session.get(User.class, 1L);
        System.out.println(user.getName());

        // 关闭Session和SessionFactory
        session.close();
        sessionFactory.close();
    }
}