简述
- 上一文中简述了使用StringRedisTemplate操作redis中的set类型,今天来记录一下操作zset类型的主要方法
代码
@RunWith(SpringRunner.class)
@SpringBootTest
public class ZSetDemo {
@Autowired
private StringRedisTemplate redisTemplate;
@Test
public void test1() {
//向集合中插入元素,并设置分数
redisTemplate.opsForZSet().add("ranking-list", "p1", 2.1);
//向集合中插入多个元素
DefaultTypedTuple<String> tuple1 = new DefaultTypedTuple<String>("p2", 1.1);
DefaultTypedTuple<String> tuple2 = new DefaultTypedTuple<String>("p3", 3.1);
redisTemplate.opsForZSet().add("ranking-list", new HashSet<>(Arrays.asList(tuple1, tuple2)));
//打印
printZSet("ranking-list");
}
@Test
public void test2() {
printZSet("ranking-list");
//从集合中删除指定元素
redisTemplate.opsForZSet().remove("ranking-list", "p1");
printZSet("ranking-list");
}
@Test
public void test3() {
//为指定元素加分
Double score = redisTemplate.opsForZSet().incrementScore("ranking-list", "p1", 2);
System.out.println(score);//返回加分后的得分
printZSet("ranking-list");
}
@Test
public void test4() {
//返回指定成员的排名(从小到大)
Long rank = redisTemplate.opsForZSet().rank("ranking-list", "p1");
//从大到小
Long reverseRank = redisTemplate.opsForZSet().reverseRank("ranking-list", "p1");
System.out.println(rank);
System.out.println(reverseRank);
}
@Test
public void test5() {
//返回集合内元素的排名,以及分数(从小到大)
Set<TypedTuple<String>> tuples = redisTemplate.opsForZSet().rangeWithScores("ranking-list", 0, -1);
for (TypedTuple<String> tuple : tuples) {
System.out.println(tuple.getValue() + " : " + tuple.getScore());
}
}
@Test
public void test6() {
//返回集合内元素在指定分数范围内的排名(从小到大)
Set<String> ranking = redisTemplate.opsForZSet().rangeByScore("ranking-list", 0, 5);
System.out.println(ranking);
//带偏移量和个数,下例意为从第二个开始,要三个
Set<String> ranking2 = redisTemplate.opsForZSet().rangeByScore("ranking-list", 0, 5, 1, 3);
System.out.println(ranking2);
//也可以带分数返回,类似于test5
}
@Test
public void test7() {
//返回集合内指定分数范围的成员个数
Long count = redisTemplate.opsForZSet().count("ranking-list", 0, 2);
System.out.println(count);
//返回集合内的成员个数
Long size = redisTemplate.opsForZSet().size("ranking-list");//等同于zCard(key);
System.out.println(size);
}
@Test
public void test8() {
//获得指定元素的分数
Double score = redisTemplate.opsForZSet().score("ranking-list", "p1");
System.out.println(score);
}
@Test
public void test9() {
//删除指定索引范围的元素
printZSet("ranking-list");
redisTemplate.opsForZSet().removeRange("ranking-list", 0, 0);
printZSet("ranking-list");
}
@Test
public void test10() {
//删除指定分数范围内的元素
printZSet("ranking-list");
redisTemplate.opsForZSet().removeRangeByScore("ranking-list", 4, 5);
printZSet("ranking-list");
redisTemplate.opsForZSet();
}
//求交集并集与set类似
private void printZSet(String key) {
//按照排名先后(从小到大)打印指定区间内的元素, -1为打印全部
Set<String> range = redisTemplate.opsForZSet().range(key, 0, -1);
//reverseRange 从大到小
System.out.println(range);
}
}
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原文地址:https://www.cnblogs.com/zhuyeshen/p/11433801.html
时间: 2024-10-13 23:01:12