Redis常用操作

上接文章  

基于Sentinel的Redis集群(主从&Sharding)的redis封装实现

首先可参考资料：http://www.cnblogs.com/edisonfeng/p/3571870.html

1、

/**

* 利用hset和hget插入并取redis数据，其中ps为域，key3、key4为键

* */
@RequestMapping(value = "/redis.json", produces = "application/json; charset=UTF-8")
public void getRedisData(@RequestParam("value") String value, HttpServletResponse response)
   throws Exception{
   JSONObject json = new JSONObject();
       response.setContentType("application/json;charset=UTF-8");
       Map result = new HashMap();
       String time = "12:00:00";
       String sales = "30";
   ShardedJedis jedis = null;
try {
jedis = pool.getResource();
jedis.hset("ps", "KEY3", time);
jedis.hset("ps", "KEY4", sales);
Thread.sleep(500);
String getTime = jedis.hget("ps", "KEY3");
String getSales = jedis.hget("ps", "KEY4");
result.put("dateTime", getTime);
result.put("sales", getSales);
} catch (JedisConnectionException e){
log.error("jedis连接异常", e);
}
   json.put("result", result);
       json.writeJSONString(response.getWriter());
   return;
}  

2、

/**
 * 查看ps域中所有的key值
 * */
 @RequestMapping(value = "/lookUpRedisKey.json", produces = "application/json; charset=UTF-8")
 public void lookUpRedisKey(HttpServletRequest request, HttpServletResponse response)
   throws Exception{
   JSONObject json = new JSONObject();
   response.setContentType("application/json;charset=UTF-8");
   
   String result = "";
   ShardedJedis jedis = null;
try {
jedis = pool.getResource();
Set<String> keys = jedis.hkeys("ps"); 
int keyLen = keys.size();
result = String.valueOf(keyLen);
//    Iterator<String> it=keys.iterator() ;   
//    while(it.hasNext()){   
//         String key = it.next();
//         result+=key+" ";
//    }
  } catch (JedisConnectionException e){
log.error("jedis连接异常", e);
  }
  json.put("result", result);
  json.writeJSONString(response.getWriter());
  return;
}

3、

/**
     * 清空ps域内所有key
* */
@RequestMapping(value = "/flushRedis.json", produces = "application/json; charset=UTF-8")
public void flushRedis(HttpServletRequest request, HttpServletResponse response)
   throws Exception{
   JSONObject json = new JSONObject();
       response.setContentType("application/json;charset=UTF-8");
   
       String result = "";
   ShardedJedis jedis = null;
try {
jedis = pool.getResource();
Long aa = jedis.del("ps");
result = aa.toString();
} catch (JedisConnectionException e){
log.error("jedis连接异常", e);
}
   json.put("result", result);
       json.writeJSONString(response.getWriter());
   return;
}

4、

/**
* 通过设置域ps的有效时间来设置域中所有key值的有效时间
* */
@RequestMapping(value = "/setRedisExpire.json", produces = "application/json; charset=UTF-8")
    public void setRedisExpire(HttpServletRequest request, HttpServletResponse response)
    throws Exception{
    JSONObject json = new JSONObject();
        response.setContentType("application/json;charset=UTF-8");
    
        String result = "";
    ShardedJedis jedis = null;
try {
jedis = pool.getResource();
jedis.hset("ps", "KEY1", "VALUE1");
jedis.expire("ps", 5);//设置key1的有效时间为5s
System.out.println("KEY1值为："+jedis.hget("ps", "KEY1"));
System.out.println("剩余时间："+jedis.ttl("ps"));
Thread.sleep(5000); 
System.out.println("剩余时间："+jedis.ttl("ps"));
System.out.println("KEY1值为："+jedis.hget("ps", "KEY1"));
} catch (JedisConnectionException e){
log.error("jedis连接异常", e);
}
    json.put("result", result);
        json.writeJSONString(response.getWriter());
    return;
    }