java操作redis

Posted 2021-02-04 开顺

static Jedis jedis=new Jedis("localhost");
1 java 操作list

@Test
public void testList(){
    jedis.del("javalist");
    jedis.lpush("javalist","a");
    jedis.lpush("javalist","b","c");
    List<String> listOne=jedis.sort("javalist",new SortingParams().alpha().desc()); ////字符串降序排序
    listOne.forEach(x->System.out.println(x));

   /* List<String> list=jedis.lrange("javalist",0,-1); ////lange 获取list中的值 end为-1 代表查询全部
    list.forEach(x->System.out.println(x));*/
    //System.out.println("javalist 出栈（左端）"+jedis.lpop("javalist"));
    //System.out.println("javalist 出栈（右端）"+jedis.rpop("javalist"));
   // System.out.println(jedis.ltrim("javalist",0,1));  //只保留指定区间的数据
    System.out.println("修改下标为0 的为k:"+jedis.lset("javalist",0,"k"));
    System.out.println("javalist 的长度："+jedis.llen("javalist"));
    System.out.println("javalist 下标0 对应的元素为:"+jedis.lindex("javalist",0));
}

2 java操作set

@Test
public void testSet(){
    jedis.sadd("javaset","a","c","d","b");
    System.out.println("javaset 所有元素为："+jedis.smembers("javaset"));
    System.out.println("javaset 中包含的元素个数:"+jedis.scard("javaset"));
    System.out.println("javaset 中是否包含a:"+jedis.sismember("javaset","a"));
   // System.out.println("javaset 中随机移除;"+jedis.spop("javaset"));
    //System.out.println("javaset 中移除a,b:"+jedis.srem("javaset","a","b"));
    System.out.println(jedis.smembers("javaset"));

    jedis.sadd("javaset2","c","d","e","f");
    System.out.println("javaset javaset2 的交集:"+jedis.sinter("javaset","javaset2"));
    System.out.println("javaset javaset2 的并集："+jedis.sunion("javaset","javaset2"));
    System.out.println("javaset javaset2 的差集:"+jedis.sdiff("javaset","javaset2"));

    System.out.println("将javaset 中a删除 并移入javaset2中："+jedis.smove("javaset","javaset2","a"));
    jedis.smembers("javaset").forEach(x->System.out.println(x));
    jedis.smembers("javaset2").forEach(x->System.out.println(x));
}

3 java操作HASH

@Test
public void testHash(){
    Map<String,String> map=new HashMap<String,String>();
    map.put("key1","value1");
    map.put("key2","value2");
    map.put("key3","value3");
    map.put("key4","value4");
    jedis.hmset("hash",map);  //添加名称为hash 的元素
    jedis.hset("hash","key5","value5");
    System.out.println(jedis.hgetAll("hash"));//获取hash的所有值
    System.out.println("keys:"+jedis.hkeys("hash"));//获取hash 对应的所有key
    System.out.println("values:"+jedis.hvals("hash"));//获取hash 对应的所有value
    System.out.println("将key6 保存的值加上一个整数，如果key6 不存在 则添加key6:"+jedis.hincrBy("hash","key6",6));
    System.out.println("将key6 保存的值加上一个整数，如果key6 不存在 则添加key6:"+jedis.hincrBy("hash","key6",6));
    System.out.println(jedis.hgetAll("hash"));

    System.out.println("删除一个或多个键值对"+jedis.hdel("hash","key2","key3"));
    System.out.println("hash 中的个数"+jedis.hlen("hash"));
    System.out.println("判断hash中是否存在 key3:"+jedis.hexists("hash","key3"));
    System.out.println("获取hash中的值："+jedis.hmget("hash","key3","key4"));

}

4 java操作String

@Test
public void testString(){
        jedis.set("javastring","value1");//增加数据
        jedis.set("hello","world");
        jedis.set("hello","worlds");//修改数据
    System.out.println(jedis.get("hello"));//获取数据
    System.out.println(jedis.del("hello"));//删除数据
    System.out.println(jedis.append("hello"," ni hao")); //追加
    System.out.println("增加多个值："+jedis.mset("k1","v1","k2","v2"));
    System.out.println("获取多个值："+jedis.mget("k1","k2"));
    System.out.println("删除多个值："+jedis.del(new String[]{"k1","k2"}));
        jedis.setnx("key1","kkk");//将 key 的值设为 value ，当且仅当 key 不存在
    jedis.setex("key1",2,"sdsds"); //将值 value 关联到 key ，并将 key 的生存时间设为 seconds (以秒为单位)。
    System.out.println(jedis.getSet("key1","newKey1")); //于设置指定 key 的值，并返回 key 的旧值

    System.out.println(jedis.getrange("key1",1,2));  //截取字符串
}