批量删除redis中以某字符串前缀的key

因为测试redis的环境是集群环境，所以声明多个Jedis对象，下面是实现代码

import java.util.Iterator;  
import java.util.Set;  
  
import org.junit.Before;  
import org.junit.Test;  
  
import redis.clients.jedis.Jedis;  
  
public class TestRedis {  
    private Jedis jedis;  
    private Jedis jedis1;  
    private Jedis jedis2;  
    private Jedis jedis3;  
    private String pre_str = "a";           //redis的key的前缀  
  
    @Before  
    public void setup() {  
        System.out.println("---------------------------------setup------------------");  
        // 连接redis服务器，127.0.0.1:6379  
        // jedis = new Jedis("127.0.0.1", 6379);  
        jedis1 = new Jedis("127.0.0.1", 6377);  
        jedis2 = new Jedis("127.0.0.2", 6378);  
        jedis3 = new Jedis("127.0.0.3", 6379);  
        // 权限认证  
        // jedis.auth("admin");  
    }  
  
    /** 
     * redis批量删除以某字符串前缀的key 
     */  
    @Test  
    public void testBatchDel() {  
        System.out.println("---------------------------------testBatchDel------------------");  
        batchDel(jedis1);  
        batchDel(jedis2);  
        batchDel(jedis3);  
    }  
      
    private void batchDel(Jedis jedis){  
        Set<String> set = jedis.keys(pre_str +"*");  
        Iterator<String> it = set.iterator();  
        while(it.hasNext()){  
            String keyStr = it.next();  
            System.out.println(keyStr);  
            jedis.del(keyStr);  
        }  
    }  
}