redis 模糊查询 批量删除

场景: 文章评论分页=>redis存 key为articleId+页数 更新了点东西不好删除该分页涉及到的的全部内容 

思路: 把分页的key全部查找出来 然后依次便利删除

实现:

  /**
     * 查找匹配key
     *
     * @param pattern key
     * @return /
     */
    public List<String> scan(String pattern) {
        ScanOptions options = ScanOptions.scanOptions().match(pattern + "*").build();
        RedisConnectionFactory factory = redisTemplate.getConnectionFactory();
        RedisConnection rc = Objects.requireNonNull(factory).getConnection();
        Cursor<byte[]> cursor = rc.scan(options);
        List<String> result = new ArrayList<>();
        while (cursor.hasNext()) {
            result.add(new String(cursor.next()));
        }
        try {
            RedisConnectionUtils.releaseConnection(rc, factory);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    } 

/**
     * 清除缓存分页
     * 实现思路 key:普通key redis模糊匹配出对应的key 然后便利删除
     * @param redisKeyPrefix
     * @return Boolean
     * @author zhang
     * @date 2022/5/24 8:18
     */
    public void deleteKeys(String redisKeyPrefix) {
        //判定key是否存在 查找匹配key
        log.info("匹配到的redisKeyPrefix为============={}=============", redisKeyPrefix);
        List<String> list = scan(redisKeyPrefix);
        log.info("匹配到的key为============={}=============", list);
        if (ObjectUtil.isNotEmpty(list)) {
            list.stream()
                    .filter(Objects::nonNull)
                    .forEach(s -> {
                                Boolean del = del(s);
                                log.info("删除==={}", del);
                            }
                    );
        }

使用:

 @Autowired
    private RedisUtil redisUtil;

    @Test
    void testPay()  {
        redisUtil.deleteKeys("articleComment::151742802195560448");

    }

结果展示: