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"); Setsql=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 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 user=new HashMap (); 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 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 iter=jedis.hkeys("user").iterator(); while (iter.hasNext()){ String key = iter.next(); System.out.println(key+":"+jedis.hmget("user",key)); } } }
新闻标题:Jedis常用操作总结笔记
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