StringRedisTemplate操作hash

一时失言乱红尘 2022-10-05 11:44 201阅读 0赞

package com.frank.redis.web;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.StringRedisTemplate;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.*;
    
    /**
     * @author 小石潭记
     * @date 2021/6/8 20:34
     * @Description: ${todo}
     */
    @RestController
    @RequestMapping("/redis-test")
    public class RedisTestController {
        
        @Autowired
        private StringRedisTemplate redisTemplate;
        
        @GetMapping("/demo1")
        public void demo1() {
            //put方法
            redisTemplate.opsForHash().put("k1", "name", "frank");
            redisTemplate.opsForHash().put("k1", "age", "22");
            redisTemplate.opsForHash().put("k1", "height", "176");
    
            //hashKey不存在时，才设值
            //redisTemplate.opsForHash().putIfAbsent(key, hashKey, value)
        }
    
        @GetMapping("/demo2")
        public void demo2() {
            //putAll方法
            Map<String, String> data = new HashMap<>();
            data.put("name", "jack ma");
            data.put("company", "alibaba");
            data.put("age", "500");
            redisTemplate.opsForHash().putAll("k2", data);
        }
    
        @GetMapping("/demo3")
        public void demo3() {
            //delete方法，删除key对应的hash的hashkey及其value
            redisTemplate.opsForHash().delete("k2", "name");
        }
    
        @GetMapping("/demo4")
        public void demo4() {
            //hasKey方法，确定hashkey是否存在
            System.out.println(redisTemplate.opsForHash().hasKey("k2", "name"));
        }
    
        @GetMapping("/demo5")
        public void demo5() {
            //get方法，根据key和hashkey找出对应的值
            System.out.println(redisTemplate.opsForHash().get("k1", "name"));
        }
    
        @GetMapping("/demo6")
        public void demo6() {
            //multiGet方法，根据key和多个hashkey找出对应的多个值
            Collection<Object> keys = new ArrayList<>();
            keys.add("name");
            keys.add("age");
            System.out.println(redisTemplate.opsForHash().multiGet("k1", keys));
        }
    
        @GetMapping("/demo7")
        public void demo7() {
            //increment方法，对key和hashkey对应的值进行增加操作
            //增加长整形（无法对浮点数据使用本方法）
            System.out.println(redisTemplate.opsForHash().increment("k1", "age", 1));
            //增加浮点型（可以对整形数据使用本方法）
            System.out.println(redisTemplate.opsForHash().increment("k1", "age", 1.0));
        }
    
        @GetMapping("/demo8")
        public void demo8() {
            //keys方法，获取key对应的hash表的所有key
            Set<Object> keys = redisTemplate.opsForHash().keys("k1");
            System.out.println(keys);
    
            //values方法，获取key对应的hash表的所有value
            List<Object> values = redisTemplate.opsForHash().values("k1");
            System.out.println(values);
        }
    
        @GetMapping("/demo9")
        public void demo9() {
            //keys方法，获取key对应的hash表的大小
            long size = redisTemplate.opsForHash().size("k1");
            System.out.println(size);
        }
    
        @GetMapping("/demo10")
        public void demo10() {
            //keys方法，获取key对应的hash表的所有键值对
            Map<Object, Object> entries = redisTemplate.opsForHash().entries("k1");
            System.out.println(entries);
        }
        
    }

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