java 操作Redis Set 命令 实例（Jedis）
package com.jjf.redis;
import org.junit.Assert;
import org.junit.Test;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.Pipeline;
import redis.clients.jedis.ScanResult;
import java.util.List;
import java.util.Set;
/**
* Created by jjf_lenovo on 2017/3/31.
*/
public class RedisSetTest {
Jedis jedis = null;
static final String DATASOURCE_URL = "182.254.213.106";
static final int DATASOURCE_SORT = 6379;
static final String DATASOURCE_PASS = "123456";
static final int DATASOURCE_SELECT = 1;
public RedisSetTest(){
//基本配置
jedis = new Jedis(DATASOURCE_URL,DATASOURCE_SORT);
jedis.auth(DATASOURCE_PASS);
jedis.select(DATASOURCE_SELECT);
}
@Test
public void testSAdd(){
//sadd 将一个或多个 member 元素加入到集合 key 当中，已经存在于集合的 member 元素将被忽略。
Assert.assertTrue(jedis.sadd("set","a")==1);
Assert.assertTrue(jedis.sadd("set","a","b","c")==2);
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSCard(){
//scard 返回集合 key 的基数(集合中元素的数量)。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.scard("set".getBytes())==3);
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSDiff(){
//sdiff 返回一个集合的全部成员，该集合是所有给定集合之间的差集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Set<String> a = jedis.sdiff("set","SET");//是找出set中，SET没有的元素，多级的话，一个个比
Set<String> b = jedis.sdiff("SET","set");//是找出SET中，set没有的元素，多级的话，一个个比
System.out.println(a.toString()+":::"+b.toString());
Assert.assertTrue(jedis.del("set","SET")==2);
}
@Test
public void testSDiffStore(){
//sdiffstore 这个命令的作用和 SDIFF 类似，但它将结果保存到 destination 集合，而不是简单地返回结果集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Assert.assertTrue(jedis.sdiffstore("store","SET","set")==3);
Assert.assertTrue(jedis.sdiffstore("store","set","SET")==0);
Assert.assertTrue(jedis.del("set","SET")==2);
}
@Test
public void testSInter(){
//sinter 返回一个集合的全部成员，该集合是所有给定集合的交集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Set<String> set = jedis.sinter("set","SET");
System.out.println(set.toString());
Assert.assertTrue(set.size()==3);
Assert.assertTrue(jedis.del("set","SET")==2);
}
@Test
public void testSInterStore(){
//sinterstore 这个命令类似于 SINTER 命令，但它将结果保存到 destination 集合，而不是简单地返回结果集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Assert.assertTrue(jedis.sinterstore("store","set","SET")==3);
Assert.assertTrue(jedis.del("set","SET","store")==3);
}
@Test
public void testSIsMember(){
//sismember 判断 member 元素是否集合 key 的成员。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sismember("set","b"));
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSMembers(){
//smembers 返回集合 key 中的所有成员。 不存在的 key 被视为空集合。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Set<String> set = jedis.smembers("set");
System.out.println(set.toString());
Assert.assertTrue(set.size()==3);
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSMove(){
//将 member 元素从 source 集合移动到 destination 集合。 (原子操作)
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Assert.assertTrue(jedis.smove("set","SET","a")==1);
Set<String> a = jedis.smembers("set");
Set<String> b = jedis.smembers("SET");
System.out.println(a.toString());
System.out.println(b.toString());
Assert.assertTrue(a.size()==2);
Assert.assertTrue(b.size()==6);//因为原本就存在a ，所以还是6个
Assert.assertTrue(jedis.del("set","SET")==2);
}
@Test
public void testSPop(){
//spop 移除并返回集合中的一个随机元素。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
System.out.println(jedis.spop("set"));
Set<String> a = jedis.smembers("set");
Assert.assertTrue(a.size()==2);
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSRandMember(){
/**
* 如果命令执行时，只提供了 key 参数，那么返回集合中的一个随机元素。
从 Redis 2.6 版本开始， SRANDMEMBER 命令接受可选的 count 参数：
如果 count 为正数，且小于集合基数，那么命令返回一个包含 count 个元素的数组，数组中的元素各不相同。如果 count 大于等于集合基数，那么返回整个集合。
如果 count 为负数，那么命令返回一个数组，数组中的元素可能会重复出现多次，而数组的长度为 count 的绝对值。
*/
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
System.out.println(jedis.srandmember("set"));//不同于spop，srandmember不移除
Set<String> a = jedis.smembers("set");
Assert.assertTrue(a.size()==3);
//测试多个随机数
List<String> lista = jedis.srandmember("set",2);//返回两个不重复的随机数
System.out.println("lista:"+lista.toString());
List<String> listb = jedis.srandmember("set",5);//5>3 返回全部数据
System.out.println("listb:"+listb.toString());
List<String> listc = jedis.srandmember("set",-2); //返回|-2|个可以重复的数据
System.out.println("listc:"+listc.toString());
List<String> listd = jedis.srandmember("set",-6); //返回|-6|个可以重复的数据
System.out.println("listd:"+listd.toString());
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSRem(){
//srem 移除集合 key 中的一个或多个 member 元素，不存在的 member 元素会被忽略。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.srem("set","a","d")==1);
Assert.assertTrue(jedis.del("set")==1);
}
@Test
public void testSunion(){
//sunion 返回一个集合的全部成员，该集合是所有给定集合的并集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Set<String> set = jedis.sunion("set","SET");
System.out.println(set.toString());
Assert.assertTrue(set.size()==6);
Assert.assertTrue(jedis.del("set","SET")==2);
}
@Test
public void testSunionStore(){
//sunion 返回一个集合的全部成员，该集合是所有给定集合的并集。
Assert.assertTrue(jedis.sadd("set","a","b","c")==3);
Assert.assertTrue(jedis.sadd("SET","A","B","C","a","b","c")==6);
Assert.assertTrue(jedis.sunionstore("store","set","SET")==6);
Assert.assertTrue(jedis.del("set","SET","store")==3);
}
@Test
public void testSScan(){
Pipeline pipeline = jedis.pipelined();
for(int i=0;i<1000;i++){
pipeline.sadd("set",String.valueOf(i));
}
pipeline.sync();
ScanResult<String> result ;//= jedis.sscan("set",0);
// System.out.println(result.getResult().size()+"::"+result.getStringCursor());
// System.out.println(result.getResult().toString());
int count = 0;
int cursor = 0;
do{
// System.out.println(result.getCursor());
result = jedis.sscan("set",cursor);
cursor = Integer.valueOf(result.getStringCursor());
for (String ss : result.getResult()) {
count++;
System.out.print("<"+count+":" + ss + ">");
}
System.out.println();
}
while(cursor!=0);
System.out.println(count);
Assert.assertTrue(count==1000);
Assert.assertTrue(jedis.del("set","SET","store")==1);
}
}