Redis的Zset在排行榜中应用

1.在pom文件导入：

 <!-- redis --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency><dependency><groupId>org.springframework.session</groupId><artifactId>spring-session-data-redis</artifactId></dependency>

2.yml文件配置

  redis:port: 6379host: localhostdatabase: 5

3.代码：

import java.util.Set;@RestController@RequestMapping("/leaderboard")public class  testController {@Autowiredprivate StringRedisTemplate stringRedisTemplate;/*** 增加玩家分数* @param player* @param score*/@PostMapping("/add")public void addPlayerScore(String player, double score) {stringRedisTemplate.opsForZSet().add("playerRanking", player, score);}/*** 获取前N名玩家排名* @param topN* @return*/@GetMapping("/top")public Set<ZSetOperations.TypedTuple<String>> getPlayerRanking(int topN) {return stringRedisTemplate.opsForZSet().reverseRangeWithScores("playerRanking", 0, topN - 1);}/*** 获取玩家排名* @param player* @return*/@GetMapping("/rank")public Long getPlayerRank(String player) {return stringRedisTemplate.opsForZSet().reverseRank("playerRanking", player) + 1;}/*** 对应的加分操作*/@GetMapping("/increment")public void incrementScore(String player,double socre){stringRedisTemplate.opsForZSet().incrementScore("playerRanking",player,socre);}
}

4.插入数据：

@SpringBootTest
public class test {@Autowiredprivate StringRedisTemplate stringRedisTemplate;@Testpublic void batchAddPlayers() {Random random = new Random();for (int i = 1; i <= 20; i++) {String player = "Player" + i; double score = random.nextDouble() * 100; stringRedisTemplate.opsForZSet().incrementScore("playerRanking",player,score);}}
}