存儲(chǔ)格式

基本用法

Jedis工具[圖片上傳中...(image.png-8e2218-1556691362552-0)]
類(lèi)

redis配置文件

String

Hash

List

Set

SortedSet
存儲(chǔ)格式

image.png

基本用法
通過(guò)Jedis(封裝了redis的Java客戶(hù)端)對(duì)redis進(jìn)行操作啦粹。

Jedis工具類(lèi)
public class JedisPoolUtil {
private static JedisPool pool = null;
static {
//加載配置文件
InputStream in = JedisPoolUtil.class.getClassLoader().getResourceAsStream("redis.properties");
Properties pro = new Properties();
try {
pro.load(in);
} catch (IOException e) {
e.printStackTrace();
System.out.println("加載文件失敗");
}
JedisPoolConfig poolConfig = new JedisPoolConfig();
//最大連接數(shù)
poolConfig.setMaxTotal(Integer.parseInt( pro.get("redis.maxTotal").toString()));
//最大空閑連接數(shù)
poolConfig.setMaxIdle(Integer.parseInt( pro.get("redis.maxIdle").toString()));
//最小空閑連接數(shù)
poolConfig.setMinIdle(Integer.parseInt( pro.get("redis.minIdle").toString()));
pool = new JedisPool(poolConfig, pro.get("redis.url").toString(),Integer.parseInt( pro.get("redis.port")
.toString()));
}

public static Jedis getJedis(){
    return pool.getResource();
}
public static void release(Jedis jedis){
    if(null != jedis){
        jedis.close();
    }
}

}
redis配置文件
redis.maxTotal=100
redis.maxIdle=30
redis.minIdle=10
redis.url=192.168.202.200
redis.port=6379
String
public class StringTest {
public Jedis jedis = JedisPoolUtil.getJedis();
@Test
//添加和獲取
public void fun(){
jedis.set("num","1");
System.out.println(jedis.get("num"));
}
@Test
//刪除值
public void fun1(){
jedis.del("num");
System.out.println(jedis.get("num"));
}
@Test
//自減和自減
public void fun2(){
jedis.set("num","1");
System.out.println(jedis.get("num"));
jedis.decr("num");
System.out.println(jedis.get("num"));
jedis.incr("num");
jedis.incr("num");
System.out.println(jedis.get("num"));
}
@Test
//加上/減去 一個(gè)數(shù)
//incrBy 返回的是修改之后的值如果原值是字符串不是數(shù)字妇垢，則會(huì)拋出異常
public void fun3(){
Long num = jedis.incrBy("num", 3);
System.out.println(num);
jedis.decrBy("num",10);

    System.out.println(jedis.get("num"));
    jedis.set("name","caopengfei");
    //jedis.decrBy("name",1);
}
@Test
//字符串拼接
public void fun4(){
    Long len = jedis.append("name", "123");
    System.out.println(len);
    System.out.println(jedis.get("name"));
}

}
Hash
public class HashTest {
public Jedis jedis = JedisPoolUtil.getJedis();

//    hash 操作的是map對(duì)象

// 適合存儲(chǔ)鍵值對(duì)象的信息
@Test
//存值 參數(shù)第一個(gè)變量的名稱(chēng)， map鍵名(key)， map鍵值(value)
// 調(diào)用hset
public void fun() {
Long num = jedis.hset("hash1", "username", "caopengfei");
System.out.println(num);
String hget = jedis.hget("hash1", "username");
System.out.println(hget);
}

@Test
//也可以存多個(gè)key

// 調(diào)用hmset
public void fun1() {
Map<String, String> map = new HashMap<String, String>();
map.put("username", "caopengfei");
map.put("age", "25");
map.put("sex", "男");
String res = jedis.hmset("hash2", map);
System.out.println(res);//ok
}

@Test
//獲取hash中所有的值
public void fun2() {
    Map<String, String> map2 = new HashMap<String, String>();
    map2 = jedis.hgetAll("hash2");
    System.out.println(map2);
}

@Test

// 刪除hash中的鍵 可以刪除一個(gè)也可以刪除多個(gè)掌测，返回的是刪除的個(gè)數(shù)
public void fun3() {
Long num = jedis.hdel("hash2", "username", "age");
System.out.println(num);
Map<String, String> map2 = new HashMap<String, String>();
map2 = jedis.hgetAll("hash2");
System.out.println(map2);
}

@Test
//增加hash中的鍵值對(duì)
public void fun4() {
    Map<String, String> map2 = new HashMap<String, String>();
    map2 = jedis.hgetAll("hash2");
    System.out.println(map2);
    jedis.hincrBy("hash2", "age", 10);
    map2 = jedis.hgetAll("hash2");
    System.out.println(map2);
}

@Test
//判斷hash是否存在某個(gè)值
public void fun5() {
    System.out.println(jedis.hexists("hash2", "username"));
    System.out.println(jedis.hexists("hash2", "age"));
}

@Test
//獲取hash中鍵值對(duì)的個(gè)數(shù)
public void fun6() {
    System.out.println(jedis.hlen("hash2"));
}

//    獲取一個(gè)hash中所有的key值
@Test
public void fun7() {
    Set<String> hash2 = jedis.hkeys("hash2");
    System.out.println(hash2);
}

//    獲取所有的value值
@Test
public void fun8() {
    List<String> hash2 = jedis.hvals("hash2");
    System.out.println(hash2);
}

}
List
public void testList()
{
jedis.flushDB();
System.out.println("===========添加一個(gè)list===========");
jedis.lpush("collections", "ArrayList", "Vector", "Stack", "HashMap", "WeakHashMap", "LinkedHashMap");
jedis.lpush("collections", "HashSet");
jedis.lpush("collections", "TreeSet");
jedis.lpush("collections", "TreeMap");
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));//-1代表倒數(shù)第一個(gè)元素寡壮，-2代表倒數(shù)第二個(gè)元素
System.out.println("collections區(qū)間0-3的元素："+jedis.lrange("collections",0,3));
System.out.println("===============================");
// 刪除列表指定的值 衫生，第二個(gè)參數(shù)為刪除的個(gè)數(shù)（有重復(fù)時(shí)）凹炸，后add進(jìn)去的值先被刪采桃，類(lèi)似于出棧
System.out.println("刪除指定元素個(gè)數(shù)："+jedis.lrem("collections", 2, "HashMap"));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("刪除下表0-3區(qū)間之外的元素："+jedis.ltrim("collections", 0, 3));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("collections列表出棧（左端）："+jedis.lpop("collections"));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("collections添加元素懒熙，從列表右端，與lpush相對(duì)應(yīng)："+jedis.rpush("collections", "EnumMap"));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("collections列表出棧（右端）："+jedis.rpop("collections"));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("修改collections指定下標(biāo)1的內(nèi)容："+jedis.lset("collections", 1, "LinkedArrayList"));
System.out.println("collections的內(nèi)容："+jedis.lrange("collections", 0, -1));
System.out.println("===============================");
System.out.println("collections的長(zhǎng)度："+jedis.llen("collections"));
System.out.println("獲取collections下標(biāo)為2的元素："+jedis.lindex("collections", 2));
System.out.println("===============================");
jedis.lpush("sortedList", "3","6","2","0","7","4");
System.out.println("sortedList排序前："+jedis.lrange("sortedList", 0, -1));
System.out.println(jedis.sort("sortedList"));
System.out.println("sortedList排序后："+jedis.lrange("sortedList", 0, -1));
}
Set
/*

• Set集合普办，和List類(lèi)的區(qū)別就是

• set中不會(huì)出現(xiàn)重復(fù)的數(shù)據(jù)

• 他可以進(jìn)行聚合操作效率比較高

• 其余的操作基本上和list相同

• */
  public class SetTest {
  public Jedis jedis = JedisPoolUtil.getJedis();

  @Test
  /添加元素刪除元素/
  public void fun(){
  Long num = jedis.sadd("myset", "a", "a", "b","abc");
  System.out.println(num);

  }
  @Test
  /獲得元素/
  public void fun1(){
  Set<String> myset = jedis.smembers("myset");
  System.out.println(myset);
  }
  @Test
  /移除元素/
  public void fun2(){
  jedis.srem("myset","a","b");
  Set<String> myset = jedis.smembers("myset");
  System.out.println(myset);
  }
  @Test
  //判斷是否這個(gè)set中存在某個(gè)值
  public void fun3(){
  Boolean sismember = jedis.sismember("myset", "a");
  System.out.println(sismember);
  }
  @Test
  //獲得A-B 獲得差集合
  public void fun4(){
  jedis.sadd("myset1","123","32","abc","def","123456","sdfasd");
  jedis.sadd("myset2","abc","345","123","fda");
  Set<String> sdiff = jedis.sdiff("myset1", "myset2");
  System.out.println(sdiff);
  }
  @Test
  //獲得交集
  public void fun5(){
  Set<String> sinter = jedis.sinter("myset1", "myset2");
  System.out.println(sinter);

  }
  @Test
  // 獲得并集合
  public void fun6(){
  Set<String> sunion = jedis.sunion("myset1", "myset2");
  System.out.println(sunion);
  }
  @Test
  // 成員數(shù)量
  public void fun7(){
  System.out.println(jedis.scard("myset1"));
  }
  @Test
  // 獲得隨機(jī)的一個(gè)成員
  public void fun8(){
  System.out.println(jedis.srandmember("myset1"));
  }
  @Test
  // 將相差的成員放到一個(gè)新的set中同理交集和并集都可以后面均
  // 加上一個(gè)store即可
  // 并返回新的長(zhǎng)度
  public void fun9(){
  System.out.println(jedis.sdiffstore("myset3","myset1","myset2"));
  System.out.println(jedis.smembers("myset3"));
  }
  }
  SortedSet
  /*
  和set極為的類(lèi)似工扎，他們是字符串的集合，沒(méi)有重復(fù)的數(shù)據(jù)
  差別是sortedset每個(gè)成員中都會(huì)有一個(gè)分?jǐn)?shù)（score）與之關(guān)聯(lián)
  衔蹲，redis正是通過(guò)分?jǐn)?shù)來(lái)為集合中的成員進(jìn)行從小到大的排序
  sortedset中數(shù)據(jù)必須單一但是他的score可以是重復(fù)的
  */
  public class SortedsetTest {
  public Jedis jedis = JedisPoolUtil.getJedis();
  // 添加元素
  @Test
  public void fun(){
  jedis.zadd("mysort",100.0, "zhangsan");
  jedis.zadd("mysort",200.0,"lisi");
  jedis.zadd("mysort",50.0,"wangwu");
  Map<String ,Double>map = new HashMap<String ,Double>();
  map.put("mutouliu",70.0);

    jedis.zadd("mysort",map);
    Set<String> mysort = jedis.zrange("mysort", 0, -1);
    System.out.println(mysort);
    Set<String> mysort1 = jedis.zrange("mysort", 1, 2);
    System.out.println(mysort1);
  

  }
  }