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Jedis 常用操作总结笔记

public class TestRedis {
    private Jedis jedis; 
    @Before       //Junit注解
    public void setup() {
        //连接redis服务器,192.168.0.100:6379
        //jedis对象实例化两种方式
        jedis = new Jedis("192.168.0.100", 6379);
        jedis = RedisClient.getResource();
        //权限认证
        jedis.auth("admin");  
    }
    
    /**
     * redis存储字符串
     */
    @Test
    public void testString() {
        //-----添加数据----------  
        jedis.flushDB();
        jedis.set("name","annie");//向key-->name中放入了value-->  
        System.out.println(jedis.get("name"));       //执行结果:xinxin  
        
        jedis.setnx("name", "bill");                //存在时不写入
        System.out.println(jedis.get("name"));
              
        jedis.append("name", " is my a girl"); //value的拼接
        System.out.println(jedis.get("name")); 
        
        jedis.del("name");                      //删除某个键
        System.out.println(jedis.get("name"));
        
         //设置过期时间,单位秒
        jedis.setex("sql",2, "mysql");
        System.out.println(jedis.get("sql"));
        try {
             Thread.sleep(3000);
        }catch(InterruptedException e) {
             e.printStackTrace();
        }
        System.out.println(jedis.get("sql"));
        
        //设置多个键值对
        jedis.mset("name","annie","age","22","tel","1517252**");
        jedis.incr("age"); //进行加1操作
        //mget返回list集合
        System.out.println(jedis.mget("name","age","tel"));
        
    }
    
    
    /** 
     * jedis操作List 
     */  
    @Test  
    public void testList(){  
        //先移除所有的内容  
        jedis.del("framework");  
        System.out.println(jedis.lrange("framework",0,-1));  
        //从framework头部存放三条数据  
        jedis.lpush("framework","spring");  
        jedis.lpush("framework","struts");  
        jedis.lpush("framework","hibernate");  
        //第一个是key,第二个是起始位置,第三个是结束位置,-1表示取得所有  
        System.out.println(jedis.lrange("framework",0,-1));  
        System.out.println(jedis.lrange("framework",0,2));   //包含2下标
        //jedis.llen("framework");                                //获取列表长度
        jedis.del("framework");
        
        //从framework尾部存放三条数据
        jedis.rpush("framework","spring");  
        jedis.rpush("framework","struts");  
        jedis.rpush("framework","hibernate"); 
        System.out.println(jedis.lrange("framework",0,-1));
        
        //linsert在key 对应list的特定位置之前或之后添加字符串元素
        //eg:linsert mylist3 before "world" "there"
        //redis 127.0.0.1:6379> lrange mylist3 0 -1
                                    1) "hello"
                                    2) "there"
                                    3) "world"
                 
                
                //获取列表长度
              System.out.println(jedis.llen("sql"));
              //排序
              //System.out.println();
              jedis.lset("sql", 0, "oracle");
              //获取下标为某list下标为0的值
              System.out.println(jedis.lindex("sql", 0));
              //删除数据
              //lrem 从key 对应 list 中删除count个和value相同的元素
                //eg: lrem mylist5 2 "hello"    
                //count>0:按从头到尾的顺序删除 count<0从尾到头;count=0:全部删除 
              System.out.println(jedis.lrem("sql", 1,"mongodb"));
              System.out.println(jedis.lindex("sql", 1));
              jedis.rpush("sql", "s");
              //删除区间以外的
              System.out.println(jedis.ltrim("sql", 0, 1));
              System.out.println(jedis.rpush("sql", "mongodb"));
              //判断是否存在,存在则弹栈
              System.out.println(jedis.rpushx("sql", "mongodb"));
              //弹出尾元素
              jedis.rpop("sql");
              //弹出头元素
              jedis.lpop("sql");
              //尾部进栈
              jedis.rpush("sql", "mysql");
              //头部进栈
              jedis.lpush("sql", "linput");                          
    }  
    
    /** 
     * jedis操作Set 
     */  
    @Test  
    public void testSet(){  
              jedis.sadd("sql", "mysql");
              jedis.sadd("sql", "redis");
              jedis.sadd("sql", "mongodb");
              jedis.sadd("sql", "oracle");
              Set<String>sql=jedis.smembers("sql");
              System.out.println(sql);
              //移除指定元素
              jedis.srem("sql", "redis");
              //输出全部set的值
              Set<String>sqls=jedis.smembers("sql");
              System.out.println(sqls);
              //判断set是否存在
              System.out.println(jedis.sismember("sql", "mysql"));
              //返回集合元素总数
              System.out.println(jedis.scard("sql"));
            
              jedis.sadd("sql2", "mysql");
              jedis.sadd("sql2", "redis");
              jedis.sadd("sql2", "sql");
              //交集
              System.out.println(jedis.sinter("sql","sql2"));
              //并集
              System.out.println(jedis.sunion("sql","sql2"));
              //差集
              System.out.println(jedis.sdiff("sql2","sql"));
              //差集
              System.out.println(jedis.sdiff("sql","sql2"));
    }  
      public void testSortedSet(){

              Jedis jedis =RedisClient.getResource();
              jedis.flushDB();
              jedis.zadd("sql", 22, "redis");
              jedis.zadd("sql", 23, "mysql");	
              jedis.zadd("sql", 2, "mongodb");
              jedis.zadd("sql", 1, "oracle");
              //从小到大
              System.out.println(jedis.zrange("sql", 0, -1));
              //从大到小
              System.out.println(jedis.zrevrange("sql", 0, -1));
              //统计所有的个数
              System.out.println(jedis.zcard("sql"));
              //查询元素的下标
              System.out.println(jedis.zscore("sql", "11"));
              //统计10-30下标的元素个数
              System.out.println(jedis.zcount("sql", 10, 30));
      
      }
    /**
     * redis操作Map
    */
    @Test
    public void testMap() {
         
        jedis.flushDB();
              Map<String,String> user=new HashMap<String,String>();
              user.put("name", "小明");
              user.put("age", "10");
              user.put("gender", "man");
              user.put("like", "basketball");
              jedis.hmset("user", user);
              //获取key为name的元素
              System.out.println(jedis.hmget("user", "name"));
              //统计元素个数
              System.out.println(jedis.hlen("user"));
              //是否存在
              System.out.println(jedis.exists("user"));
              //获取所有的key
              System.out.println(jedis.hkeys("user"));
              //获取所有的value
              System.out.println(jedis.hvals("user"));
              for(Map.Entry<String, String> user1:user.entrySet()){
                System.out.println(user1.getKey()+":"+user1.getValue());
              }
              //获取map中符合key的值
              System.out.println(jedis.hmget("user", "name","age","gender"));
              //删除指定的key
              System.out.println(jedis.hdel("user", "name"));
              //判断指定的key是否存在
              System.out.println(jedis.hexists("user", "name"));
              //某值增加如果不存在创建一个新的key-value
              System.out.println(jedis.hincrBy("user", "key", 123456));
              System.out.println(jedis.hincrBy("user", "key", 22));
              //如果map的key存在不更新value并返回0
              System.out.println(jedis.hsetnx("user", "name", "123"));
        
        //另一种遍历方式
        Iterator<String> iter=jedis.hkeys("user").iterator();  
        while (iter.hasNext()){  
            String key = iter.next();  
            System.out.println(key+":"+jedis.hmget("user",key));  
        }  
    }

}


本文出自 “Curiosity” 博客,请务必保留此出处http://flash09.blog.51cto.com/8831225/1906367

Jedis 常用操作总结笔记