java 对 redis 的基本操作
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一、server端安裝
1、下載https://github.com/MSOpenTech/redis 可看到當(dāng)前可下載版本:redis2.6
2、安裝
1)解壓后將里面所有文件拷貝至redis安裝目錄。
幾個exe程序的功能:
??redis-benchmark.exe:性能測試,用以模擬同時由N個客戶端發(fā)送M個 SETs/GETs 查詢 (類似于 Apache 的ab 工具).
??? redis-check-aof.exe:更新日志檢查
?? redis-check-dump.exe:本地數(shù)據(jù)庫檢查
?? redis-cli.exe:客戶端
??? redis-server.exe:服務(wù)端 ?
2)將路徑添加至系統(tǒng)環(huán)境變量:過程略
3)cmd下啟動redis-server
注:由于此處未指定配置文件,系統(tǒng)采用默認(rèn)參數(shù)
3、下載對應(yīng)的配置文件
由上面cmd輸出可知,當(dāng)前版本為2.6.12
原頁面上打開所有發(fā)布版本,找到2.6.12:
下載zip文件:
拷貝出redis.conf配置文件至安裝目錄:
配置文件各字段含義:http://cardyn.iteye.com/blog/794194
ps:如果配置文件的版本和當(dāng)前exe程序的版本不匹配,很容易
由于參數(shù)不一致導(dǎo)致server端無法啟動。
4、通過指定的配置文件啟動服務(wù)端
5、客戶端訪問測試?另起一個cmd窗口: ?
二、基本功能測試
主要類
1)功能類
package com.redis;import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Set;import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig; import redis.clients.jedis.JedisShardInfo; import redis.clients.jedis.ShardedJedis; import redis.clients.jedis.ShardedJedisPool; import redis.clients.jedis.SortingParams;public class RedisClient {private Jedis jedis;//非切片額客戶端連接private JedisPool jedisPool;//非切片連接池private ShardedJedis shardedJedis;//切片額客戶端連接private ShardedJedisPool shardedJedisPool;//切片連接池public RedisClient() { initialPool(); initialShardedPool(); shardedJedis = shardedJedisPool.getResource(); jedis = jedisPool.getResource(); } /*** 初始化非切片池*/private void initialPool() { // 池基本配置 JedisPoolConfig config = new JedisPoolConfig(); config.setMaxActive(20); config.setMaxIdle(5); config.setMaxWait(1000l); config.setTestOnBorrow(false); jedisPool = new JedisPool(config,"127.0.0.1",6379);}/** * 初始化切片池 */ private void initialShardedPool() { // 池基本配置 JedisPoolConfig config = new JedisPoolConfig(); config.setMaxActive(20); config.setMaxIdle(5); config.setMaxWait(1000l); config.setTestOnBorrow(false); // slave鏈接 List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>(); shards.add(new JedisShardInfo("127.0.0.1", 6379, "master")); // 構(gòu)造池 shardedJedisPool = new ShardedJedisPool(config, shards); } public void show() { KeyOperate(); StringOperate(); ListOperate(); SetOperate();SortedSetOperate();HashOperate(); jedisPool.returnResource(jedis);shardedJedisPool.returnResource(shardedJedis);} private void KeyOperate() {。。。}private void StringOperate() {。。。}private void ListOperate() {。。。}private void SetOperate() {。。。}private void SortedSetOperate() {。。。}private void HashOperate() {。。。} }2)測試類package com.redis;public class Main {public static void main(String[] args) {// TODO Auto-generated method stubnew RedisClient().show(); }} 3、各個功能函數(shù)1)key功能private void KeyOperate() { System.out.println("======================key=========================="); // 清空數(shù)據(jù) System.out.println("清空庫中所有數(shù)據(jù):"+jedis.flushDB());// 判斷key否存在 System.out.println("判斷key999鍵是否存在:"+shardedJedis.exists("key999")); System.out.println("新增key001,value001鍵值對:"+shardedJedis.set("key001", "value001")); System.out.println("判斷key001是否存在:"+shardedJedis.exists("key001"));// 輸出系統(tǒng)中所有的keySystem.out.println("新增key002,value002鍵值對:"+shardedJedis.set("key002", "value002"));System.out.println("系統(tǒng)中所有鍵如下:");Set<String> keys = jedis.keys("*"); Iterator<String> it=keys.iterator() ; while(it.hasNext()){ String key = it.next(); System.out.println(key); }// 刪除某個key,若key不存在,則忽略該命令。System.out.println("系統(tǒng)中刪除key002: "+jedis.del("key002"));System.out.println("判斷key002是否存在:"+shardedJedis.exists("key002"));// 設(shè)置 key001的過期時間System.out.println("設(shè)置 key001的過期時間為5秒:"+jedis.expire("key001", 5));try{ Thread.sleep(2000); } catch (InterruptedException e){ } // 查看某個key的剩余生存時間,單位【秒】.永久生存或者不存在的都返回-1System.out.println("查看key001的剩余生存時間:"+jedis.ttl("key001"));// 移除某個key的生存時間System.out.println("移除key001的生存時間:"+jedis.persist("key001"));System.out.println("查看key001的剩余生存時間:"+jedis.ttl("key001"));// 查看key所儲存的值的類型System.out.println("查看key所儲存的值的類型:"+jedis.type("key001"));/** 一些其他方法:1、修改鍵名:jedis.rename("key6", "key0");* 2、將當(dāng)前db的key移動到給定的db當(dāng)中:jedis.move("foo", 1)*/} 運(yùn)行結(jié)果:======================key========================== 清空庫中所有數(shù)據(jù):OK 判斷key999鍵是否存在:false 新增key001,value001鍵值對:OK 判斷key001是否存在:true 新增key002,value002鍵值對:OK 系統(tǒng)中所有鍵如下: key002 key001 系統(tǒng)中刪除key002: 1 判斷key002是否存在:false 設(shè)置 key001的過期時間為5秒:1 查看key001的剩余生存時間:3 移除key001的生存時間:1 查看key001的剩余生存時間:-1 查看key所儲存的值的類型:string2)String功能
rivate void StringOperate()
{
System.out.println("======================String_1==========================");
// 清空數(shù)據(jù)
System.out.println("清空庫中所有數(shù)據(jù):"+jedis.flushDB());
System.out.println("=============增=============");
jedis.set("key001","value001");
jedis.set("key002","value002");
jedis.set("key003","value003");
System.out.println("已新增的3個鍵值對如下:");
System.out.println(jedis.get("key001"));
System.out.println(jedis.get("key002"));
System.out.println(jedis.get("key003"));
System.out.println("=============刪=============");
System.out.println("刪除key003鍵值對:"+jedis.del("key003"));
System.out.println("獲取key003鍵對應(yīng)的值:"+jedis.get("key003"));
System.out.println("=============改=============");
//1、直接覆蓋原來的數(shù)據(jù)
System.out.println("直接覆蓋key001原來的數(shù)據(jù):"+jedis.set("key001","value001-update"));
System.out.println("獲取key001對應(yīng)的新值:"+jedis.get("key001"));
//2、直接覆蓋原來的數(shù)據(jù)
System.out.println("在key002原來值后面追加:"+jedis.append("key002","+appendString"));
System.out.println("獲取key002對應(yīng)的新值"+jedis.get("key002"));
System.out.println("=============增,刪,查(多個)=============");
/**
* mset,mget同時新增,修改,查詢多個鍵值對
* 等價于:
* jedis.set("name","ssss");
* jedis.set("jarorwar","xxxx");
*/
System.out.println("一次性新增key201,key202,key203,key204及其對應(yīng)值:"+jedis.mset("key201","value201",
"key202","value202","key203","value203","key204","value204"));
System.out.println("一次性獲取key201,key202,key203,key204各自對應(yīng)的值:"+
jedis.mget("key201","key202","key203","key204"));
System.out.println("一次性刪除key201,key202:"+jedis.del(new String[]{"key201", "key202"}));
System.out.println("一次性獲取key201,key202,key203,key204各自對應(yīng)的值:"+
jedis.mget("key201","key202","key203","key204"));
System.out.println();
//jedis具備的功能shardedJedis中也可直接使用,下面測試一些前面沒用過的方法
System.out.println("======================String_2==========================");
// 清空數(shù)據(jù)
System.out.println("清空庫中所有數(shù)據(jù):"+jedis.flushDB());
System.out.println("=============新增鍵值對時防止覆蓋原先值=============");
System.out.println("原先key301不存在時,新增key301:"+shardedJedis.setnx("key301", "value301"));
System.out.println("原先key302不存在時,新增key302:"+shardedJedis.setnx("key302", "value302"));
System.out.println("當(dāng)key302存在時,嘗試新增key302:"+shardedJedis.setnx("key302", "value302_new"));
System.out.println("獲取key301對應(yīng)的值:"+shardedJedis.get("key301"));
System.out.println("獲取key302對應(yīng)的值:"+shardedJedis.get("key302"));
System.out.println("=============超過有效期鍵值對被刪除=============");
// 設(shè)置key的有效期,并存儲數(shù)據(jù)
System.out.println("新增key303,并指定過期時間為2秒"+shardedJedis.setex("key303", 2, "key303-2second"));
System.out.println("獲取key303對應(yīng)的值:"+shardedJedis.get("key303"));
try{
Thread.sleep(3000);
}
catch (InterruptedException e){
}
System.out.println("3秒之后,獲取key303對應(yīng)的值:"+shardedJedis.get("key303"));
System.out.println("=============獲取原值,更新為新值一步完成=============");
System.out.println("key302原值:"+shardedJedis.getSet("key302", "value302-after-getset"));
System.out.println("key302新值:"+shardedJedis.get("key302"));
System.out.println("=============獲取子串=============");
System.out.println("獲取key302對應(yīng)值中的子串:"+shardedJedis.getrange("key302", 5, 7));
}
運(yùn)行結(jié)果:
=====================String_1==========================
清空庫中所有數(shù)據(jù):OK
=============增=============
已新增的3個鍵值對如下:
value001
value002
value003
=============刪=============
刪除key003鍵值對:1
獲取key003鍵對應(yīng)的值:null
=============改=============
直接覆蓋key001原來的數(shù)據(jù):OK
獲取key001對應(yīng)的新值:value001-update
在key002原來值后面追加:21
獲取key002對應(yīng)的新值value002+appendString
=============增,刪,查(多個)=============
一次性新增key201,key202,key203,key204及其對應(yīng)值:OK
一次性獲取key201,key202,key203,key204各自對應(yīng)的值:[value201, value202, value203, value204]
一次性刪除key201,key202:2
一次性獲取key201,key202,key203,key204各自對應(yīng)的值:[null, null, value203, value204]
======================String_2==========================
清空庫中所有數(shù)據(jù):OK
=============新增鍵值對時防止覆蓋原先值=============
原先key301不存在時,新增key301:1
原先key302不存在時,新增key302:1
當(dāng)key302存在時,嘗試新增key302:0
獲取key301對應(yīng)的值:value301
獲取key302對應(yīng)的值:value302
=============超過有效期鍵值對被刪除=============
新增key303,并指定過期時間為2秒OK
獲取key303對應(yīng)的值:key303-2second
3秒之后,獲取key303對應(yīng)的值:null
=============獲取原值,更新為新值一步完成=============
key302原值:value302
key302新值:value302-after-getset
=============獲取子串=============
獲取key302對應(yīng)值中的子串:302
3)List功能private void ListOperate()
{
System.out.println("======================list==========================");
// 清空數(shù)據(jù)
System.out.println("清空庫中所有數(shù)據(jù):"+jedis.flushDB());
System.out.println("=============增=============");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "ArrayList");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "vector");
shardedJedis.lpush("stringlists", "LinkedList");
shardedJedis.lpush("stringlists", "MapList");
shardedJedis.lpush("stringlists", "SerialList");
shardedJedis.lpush("stringlists", "HashList");
shardedJedis.lpush("numberlists", "3");
shardedJedis.lpush("numberlists", "1");
shardedJedis.lpush("numberlists", "5");
shardedJedis.lpush("numberlists", "2");
System.out.println("所有元素-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("所有元素-numberlists:"+shardedJedis.lrange("numberlists", 0, -1));
System.out.println("=============刪=============");
// 刪除列表指定的值 ,第二個參數(shù)為刪除的個數(shù)(有重復(fù)時),后add進(jìn)去的值先被刪,類似于出棧
System.out.println("成功刪除指定元素個數(shù)-stringlists:"+shardedJedis.lrem("stringlists", 2, "vector"));
System.out.println("刪除指定元素之后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
// 刪除區(qū)間以外的數(shù)據(jù)
System.out.println("刪除下標(biāo)0-3區(qū)間之外的元素:"+shardedJedis.ltrim("stringlists", 0, 3));
System.out.println("刪除指定區(qū)間之外元素后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
// 列表元素出棧
System.out.println("出棧元素:"+shardedJedis.lpop("stringlists"));
System.out.println("元素出棧后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("=============改=============");
// 修改列表中指定下標(biāo)的值
shardedJedis.lset("stringlists", 0, "hello list!");
System.out.println("下標(biāo)為0的值修改后-stringlists:"+shardedJedis.lrange("stringlists", 0, -1));
System.out.println("=============查=============");
// 數(shù)組長度
System.out.println("長度-stringlists:"+shardedJedis.llen("stringlists"));
System.out.println("長度-numberlists:"+shardedJedis.llen("numberlists"));
// 排序
/*
* list中存字符串時必須指定參數(shù)為alpha,如果不使用SortingParams,而是直接使用sort("list"),
* 會出現(xiàn)"ERR One or more scores can't be converted into double"
*/
SortingParams sortingParameters = new SortingParams();
sortingParameters.alpha();
sortingParameters.limit(0, 3);
System.out.println("返回排序后的結(jié)果-stringlists:"+shardedJedis.sort("stringlists",sortingParameters));
System.out.println("返回排序后的結(jié)果-numberlists:"+shardedJedis.sort("numberlists"));
// 子串: start為元素下標(biāo),end也為元素下標(biāo);-1代表倒數(shù)一個元素,-2代表倒數(shù)第二個元素
System.out.println("子串-第二個開始到結(jié)束:"+shardedJedis.lrange("stringlists", 1, -1));
// 獲取列表指定下標(biāo)的值
System.out.println("獲取下標(biāo)為2的元素:"+shardedJedis.lindex("stringlists", 2)+"\n");
}
運(yùn)行結(jié)果:
=====================list==========================
清空庫中所有數(shù)據(jù):OK
=============增=============
所有元素-stringlists:[HashList, SerialList, MapList, LinkedList, vector, vector, ArrayList, vector]
所有元素-numberlists:[2, 5, 1, 3]
=============刪=============
成功刪除指定元素個數(shù)-stringlists:2
刪除指定元素之后-stringlists:[HashList, SerialList, MapList, LinkedList, ArrayList, vector]
刪除下標(biāo)0-3區(qū)間之外的元素:OK
刪除指定區(qū)間之外元素后-stringlists:[HashList, SerialList, MapList, LinkedList]
出棧元素:HashList
元素出棧后-stringlists:[SerialList, MapList, LinkedList]
=============改=============
下標(biāo)為0的值修改后-stringlists:[hello list!, MapList, LinkedList]
=============查=============
長度-stringlists:3
長度-numberlists:4
返回排序后的結(jié)果-stringlists:[LinkedList, MapList, hello list!]
返回排序后的結(jié)果-numberlists:[1, 2, 3, 5]
子串-第二個開始到結(jié)束:[MapList, LinkedList]
獲取下標(biāo)為2的元素:LinkedList
4)Set功能
rivate void SetOperate()
{
System.out.println("======================set==========================");
// 清空數(shù)據(jù)
System.out.println("清空庫中所有數(shù)據(jù):"+jedis.flushDB());
System.out.println("=============增=============");
System.out.println("向sets集合中加入元素element001:"+jedis.sadd("sets", "element001"));
System.out.println("向sets集合中加入元素element002:"+jedis.sadd("sets", "element002"));
System.out.println("向sets集合中加入元素element003:"+jedis.sadd("sets", "element003"));
System.out.println("向sets集合中加入元素element004:"+jedis.sadd("sets", "element004"));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));
System.out.println();
System.out.println("=============刪=============");
System.out.println("集合sets中刪除元素element003:"+jedis.srem("sets", "element003"));
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));
/*System.out.println("sets集合中任意位置的元素出棧:"+jedis.spop("sets"));//注:出棧元素位置居然不定?--無實際意義
System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));*/
System.out.println();
System.out.println("=============改=============");
System.out.println();
System.out.println("=============查=============");
System.out.println("判斷element001是否在集合sets中:"+jedis.sismember("sets", "element001"));
System.out.println("循環(huán)查詢獲取sets中的每個元素:");
Set<String> set = jedis.smembers("sets");
Iterator<String> it=set.iterator() ;
while(it.hasNext()){
Object obj=it.next();
System.out.println(obj);
}
System.out.println();
System.out.println("=============集合運(yùn)算=============");
System.out.println("sets1中添加元素element001:"+jedis.sadd("sets1", "element001"));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets1", "element002"));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets1", "element003"));
System.out.println("sets1中添加元素element002:"+jedis.sadd("sets2", "element002"));
System.out.println("sets1中添加元素element003:"+jedis.sadd("sets2", "element003"));
System.out.println("sets1中添加元素element004:"+jedis.sadd("sets2", "element004"));
System.out.println("查看sets1集合中的所有元素:"+jedis.smembers("sets1"));
System.out.println("查看sets2集合中的所有元素:"+jedis.smembers("sets2"));
System.out.println("sets1和sets2交集:"+jedis.sinter("sets1", "sets2"));
System.out.println("sets1和sets2并集:"+jedis.sunion("sets1", "sets2"));
System.out.println("sets1和sets2差集:"+jedis.sdiff("sets1", "sets2"));//差集:set1中有,set2中沒有的元素
}
運(yùn)行結(jié)果:
======================set==========================
清空庫中所有數(shù)據(jù):OK
=============增=============
向sets集合中加入元素element001:1
向sets集合中加入元素element002:1
向sets集合中加入元素element003:1
向sets集合中加入元素element004:1
查看sets集合中的所有元素:[element001, element002, element003, element004]
=============刪=============
集合sets中刪除元素element003:1
查看sets集合中的所有元素:[element001, element002, element004]
=============改=============
=============查=============
判斷element001是否在集合sets中:true
循環(huán)查詢獲取sets中的每個元素:
element001
element002
element004
=============集合運(yùn)算=============
sets1中添加元素element001:1
sets1中添加元素element002:1
sets1中添加元素element003:1
sets1中添加元素element002:1
sets1中添加元素element003:1
sets1中添加元素element004:1
查看sets1集合中的所有元素:[element001, element002, element003]
查看sets2集合中的所有元素:[element002, element003, element004]
sets1和sets2交集:[element002, element003]
sets1和sets2并集:[element001, element002, element003, element004]
sets1和sets2差集:[element001]
5)SortedSet功能(有序集合)
rivate void SortedSetOperate()
{
System.out.println("======================zset==========================");
// 清空數(shù)據(jù)
System.out.println(jedis.flushDB());
System.out.println("=============增=============");
System.out.println("zset中添加元素element001:"+shardedJedis.zadd("zset", 7.0, "element001"));
System.out.println("zset中添加元素element002:"+shardedJedis.zadd("zset", 8.0, "element002"));
System.out.println("zset中添加元素element003:"+shardedJedis.zadd("zset", 2.0, "element003"));
System.out.println("zset中添加元素element004:"+shardedJedis.zadd("zset", 3.0, "element004"));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1));//按照權(quán)重值排序
System.out.println();
System.out.println("=============刪=============");
System.out.println("zset中刪除元素element002:"+shardedJedis.zrem("zset", "element002"));
System.out.println("zset集合中的所有元素:"+shardedJedis.zrange("zset", 0, -1));
System.out.println();
System.out.println("=============改=============");
System.out.println();
System.out.println("=============查=============");
System.out.println("統(tǒng)計zset集合中的元素中個數(shù):"+shardedJedis.zcard("zset"));
System.out.println("統(tǒng)計zset集合中權(quán)重某個范圍內(nèi)(1.0——5.0),元素的個數(shù):"+shardedJedis.zcount("zset", 1.0, 5.0));
System.out.println("查看zset集合中element004的權(quán)重:"+shardedJedis.zscore("zset", "element004"));
System.out.println("查看下標(biāo)1到2范圍內(nèi)的元素值:"+shardedJedis.zrange("zset", 1, 2));
}
運(yùn)行結(jié)果:
======================zset==========================
OK
=============增=============
zset中添加元素element001:1
zset中添加元素element002:1
zset中添加元素element003:1
zset中添加元素element004:1
zset集合中的所有元素:[element003, element004, element001, element002]
=============刪=============
zset中刪除元素element002:1
zset集合中的所有元素:[element003, element004, element001]
=============改=============
=============查=============
統(tǒng)計zset集合中的元素中個數(shù):3
統(tǒng)計zset集合中權(quán)重某個范圍內(nèi)(1.0——5.0),元素的個數(shù):2
查看zset集合中element004的權(quán)重:3.0
查看下標(biāo)1到2范圍內(nèi)的元素值:[element004, element001]
6)Hash功能
rivate void HashOperate()
{
System.out.println("======================hash==========================");
//清空數(shù)據(jù)
System.out.println(jedis.flushDB());
System.out.println("=============增=============");
System.out.println("hashs中添加key001和value001鍵值對:"+shardedJedis.hset("hashs", "key001", "value001"));
System.out.println("hashs中添加key002和value002鍵值對:"+shardedJedis.hset("hashs", "key002", "value002"));
System.out.println("hashs中添加key003和value003鍵值對:"+shardedJedis.hset("hashs", "key003", "value003"));
System.out.println("新增key004和4的整型鍵值對:"+shardedJedis.hincrBy("hashs", "key004", 4l));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============刪=============");
System.out.println("hashs中刪除key002鍵值對:"+shardedJedis.hdel("hashs", "key002"));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============改=============");
System.out.println("key004整型鍵值的值增加100:"+shardedJedis.hincrBy("hashs", "key004", 100l));
System.out.println("hashs中的所有值:"+shardedJedis.hvals("hashs"));
System.out.println();
System.out.println("=============查=============");
System.out.println("判斷key003是否存在:"+shardedJedis.hexists("hashs", "key003"));
System.out.println("獲取key004對應(yīng)的值:"+shardedJedis.hget("hashs", "key004"));
System.out.println("批量獲取key001和key003對應(yīng)的值:"+shardedJedis.hmget("hashs", "key001", "key003"));
System.out.println("獲取hashs中所有的key:"+shardedJedis.hkeys("hashs"));
System.out.println("獲取hashs中所有的value:"+shardedJedis.hvals("hashs"));
System.out.println();
}
運(yùn)行結(jié)果:
======================hash==========================
OK
=============增=============
hashs中添加key001和value001鍵值對:1
hashs中添加key002和value002鍵值對:1
hashs中添加key003和value003鍵值對:1
新增key004和4的整型鍵值對:4
hashs中的所有值:[value001, value002, value003, 4]
=============刪=============
hashs中刪除key002鍵值對:1
hashs中的所有值:[value001, value003, 4]
=============改=============
key004整型鍵值的值增加100:104
hashs中的所有值:[value001, value003, 104]
=============查=============
判斷key003是否存在:true
獲取key004對應(yīng)的值:104
批量獲取key001和key003對應(yīng)的值:[value001, value003]
獲取hashs中所有的key:[key004, key003, key001]
獲取hashs中所有的value:[value001, value003, 104]
三、常用命令
?
參考:http://blog.csdn.net/ithomer/article/details/9213185
? ? ? ?轉(zhuǎn)自:http://www.cnblogs.com/edisonfeng/p/3571870.html
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