一、用户eclipse实现java代码和Redis的基本操作

1、jar包 

2、代码实现

• 基本代码：Redis/src/com/redis/RedisClient.java

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;   //非切片客户端连接
    private JedisPool jedisPool;  //非切片连接池
    private ShardedJedis shardedJedis;  //切片客户端连接
    private ShardedJedisPool shardedJedisPool;  //切片连接池

    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连接
        List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>();
        shards.add(new JedisShardInfo("127.0.0.1", 6379, "master"));

        //构造池
        shardedJedisPool = new ShardedJedisPool(config, shards);

    }

    public void show(){
        KeyOperate();
        StringOperate();
        ListOperate();
        SetOperate();
        SortedSetOperate();
        HashOperate();
    }

    //功能代码模块

    /*
     * key功能
     */
     private void KeyOperate() {
         System.out.println();
        System.out.println("Key 功能 ： ");

        //清空库中所有数据
        System.out.println("清空库中所有数据: "+jedis.flushDB());

        //新增 key001，value001键值对
        System.out.println("新增 key001，value001键值对: "+shardedJedis.set("key001", "value001"));
        System.out.println("新增 key002，value002键值对: "+shardedJedis.set("key002", "value002"));

        //判断key001是否存在
        System.out.println("判断key001是否存在: "+shardedJedis.exists("key001"));

        //输出系统中所有的key
        System.out.println("输出系统中所有的key:");
        Set<String> keys = jedis.keys("*");
        Iterator<String> iterator = keys.iterator();
        while(iterator.hasNext()){
            String key = iterator.next();
            System.out.println(key);
        }
            //结果为key001 key002

        //删除某个key，若key不存在这忽略命令
        System.out.println("删除某个key，若key不存在这忽略命令: "+jedis.del("key002"));;
        System.out.println("判断key002是否存在: "+jedis.exists("key002"));  //判断key002是否存在

        //设置key001的过期时间
        System.out.println("设置key001的过期时间: "+jedis.expire("key001", 5));

        try {
            Thread.sleep(2000); //睡眠2秒
        } catch (Exception e) {

        }

        //返回某个key的剩余有效时间,单位为”秒“，不存在的或者永远有效的都返回-1
        System.out.println("返回某个key001的剩余有效时间: "+jedis.ttl("key001"));

        //设置某个key的生存时间
        System.out.println("设置某个key001的生存时间: "+jedis.persist("key001"));

        //查看key所存放值的类型
        System.out.println(""+jedis.type("key001"));

        //修改key的名称
        System.out.println("重命名key001: "+jedis.rename("key001", "key01"));

        //将当前db中的key移动到指定的db当中
        System.out.println("将当前db中的key移动到指定的db当中: "+jedis.move("key01", 3));

        /*
         * 运行结果
         * 
              清空库中所有数据：OK
        判断key999键是否存在：false
        新增key001,value001键值对：OK
        判断key001是否存在：true
        新增key002,value002键值对：OK
        系统中所有键如下：
        key002
        key001
        系统中删除key002: 1
        判断key002是否存在：false
        设置 key001的过期时间为5秒:1
        查看key001的剩余生存时间：3
        移除key001的生存时间：1
        查看key001的剩余生存时间：-1
        查看key所储存的值的类型：string
        *
        */
     }

     private void StringOperate() {
         System.out.println();
         System.out.println("String 功能 :");
         // 清空数据 
         System.out.println("清空库中所有数据："+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个键值对如下：");
         System.out.println(jedis.get("key001"));
         System.out.println(jedis.get("key002"));
         System.out.println(jedis.get("key003"));

         System.out.println("=============删=============");  
         System.out.println("删除key003键值对："+jedis.del("key003"));  
         System.out.println("获取key003键对应的值："+jedis.get("key003"));

         System.out.println("=============改=============");
         //1、直接覆盖原来的数据
         System.out.println("直接覆盖key001原来的数据："+jedis.set("key001","value001-update"));
         System.out.println("获取key001对应的新值："+jedis.get("key001"));
         //2、直接覆盖原来的数据  
         System.out.println("在key002原来值后面追加："+jedis.append("key002","+appendString"));
         System.out.println("获取key002对应的新值"+jedis.get("key002")); 

         System.out.println("=============增，删，查（多个）=============");
         /** 
          * mset,mget同时新增，修改，查询多个键值对 
          * 等价于：
          * jedis.set("name","ssss"); 
          * jedis.set("jarorwar","xxxx"); 
          */  
         System.out.println("一次性新增key201,key202,key203,key204及其对应值："+jedis.mset("key201","value201",
                         "key202","value202","key203","value203","key204","value204"));  
         System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+
                         jedis.mget("key201","key202","key203","key204"));
         System.out.println("一次性删除key201,key202："+jedis.del(new String[]{"key201", "key202"}));
         System.out.println("一次性获取key201,key202,key203,key204各自对应的值："+
                 jedis.mget("key201","key202","key203","key204")); 
         System.out.println();


         //jedis具备的功能shardedJedis中也可直接使用，下面测试一些前面没用过的方法
         System.out.println("======================String_2=========================="); 
         // 清空数据 
         System.out.println("清空库中所有数据："+jedis.flushDB());       

         System.out.println("=============新增键值对时防止覆盖原先值=============");
         System.out.println("原先key301不存在时，新增key301："+shardedJedis.setnx("key301", "value301"));
         System.out.println("原先key302不存在时，新增key302："+shardedJedis.setnx("key302", "value302"));
         System.out.println("当key302存在时，尝试新增key302："+shardedJedis.setnx("key302", "value302_new"));
         System.out.println("获取key301对应的值："+shardedJedis.get("key301"));
         System.out.println("获取key302对应的值："+shardedJedis.get("key302"));

         System.out.println("=============超过有效期键值对被删除=============");
         // 设置key的有效期，并存储数据 
         System.out.println("新增key303，并指定过期时间为2秒"+shardedJedis.setex("key303", 2, "key303-2second")); 
         System.out.println("获取key303对应的值："+shardedJedis.get("key303")); 
         try{ 
             Thread.sleep(3000); 
         } 
         catch (InterruptedException e){ 
         } 
         System.out.println("3秒之后，获取key303对应的值："+shardedJedis.get("key303")); 

         System.out.println("=============获取原值，更新为新值一步完成=============");
         System.out.println("key302原值："+shardedJedis.getSet("key302", "value302-after-getset"));
         System.out.println("key302新值："+shardedJedis.get("key302"));

         System.out.println("=============获取子串=============");
         System.out.println("获取key302对应值中的子串："+shardedJedis.getrange("key302", 5, 7));
     }

     private void ListOperate() {
         System.out.println();
         System.out.println("list 功能 ："); 
         // 清空数据 
         System.out.println("清空库中所有数据："+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("=============删=============");
         // 删除列表指定的值 ，第二个参数为删除的个数（有重复时），后add进去的值先被删，类似于出栈
         System.out.println("成功删除指定元素个数-stringlists："+shardedJedis.lrem("stringlists", 2, "vector")); 
         System.out.println("删除指定元素之后-stringlists："+shardedJedis.lrange("stringlists", 0, -1));
         // 删除区间以外的数据 
         System.out.println("删除下标0-3区间之外的元素："+shardedJedis.ltrim("stringlists", 0, 3));
         System.out.println("删除指定区间之外元素后-stringlists："+shardedJedis.lrange("stringlists", 0, -1));
         // 列表元素出栈 
         System.out.println("出栈元素："+shardedJedis.lpop("stringlists")); 
         System.out.println("元素出栈后-stringlists："+shardedJedis.lrange("stringlists", 0, -1));

         System.out.println("=============改=============");
         // 修改列表中指定下标的值 
         shardedJedis.lset("stringlists", 0, "hello list!"); 
         System.out.println("下标为0的值修改后-stringlists："+shardedJedis.lrange("stringlists", 0, -1));
         System.out.println("=============查=============");
         // 数组长度 
         System.out.println("长度-stringlists："+shardedJedis.llen("stringlists"));
         System.out.println("长度-numberlists："+shardedJedis.llen("numberlists"));
         // 排序 
         /*
          * list中存字符串时必须指定参数为alpha，如果不使用SortingParams，而是直接使用sort("list")，
          * 会出现"ERR One or more scores can't be converted into double"
          */
         SortingParams sortingParameters = new SortingParams();
         sortingParameters.alpha();
         sortingParameters.limit(0, 3);
         System.out.println("返回排序后的结果-stringlists："+shardedJedis.sort("stringlists",sortingParameters)); 
         System.out.println("返回排序后的结果-numberlists："+shardedJedis.sort("numberlists"));
         // 子串：  start为元素下标，end也为元素下标；-1代表倒数一个元素，-2代表倒数第二个元素
         System.out.println("子串-第二个开始到结束："+shardedJedis.lrange("stringlists", 1, -1));
         // 获取列表指定下标的值 
         System.out.println("获取下标为2的元素："+shardedJedis.lindex("stringlists", 2)+"\n");
     }

     private void SetOperate() {
         System.out.println();
         System.out.println("set 功能 ："); 
         // 清空数据 
         System.out.println("清空库中所有数据："+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("=============删=============");
         System.out.println("集合sets中删除元素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栈："+jedis.spop("sets"));//注：出栈元素位置居然不定？--无实际意义
         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("判断element001是否在集合sets中："+jedis.sismember("sets", "element001"));
         System.out.println("循环查询获取sets中的每个元素：");
         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("=============集合运算=============");
         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中没有的元素
     }

     private void SortedSetOperate() 
     { 
         System.out.println();
         System.out.println("zset 功能 ："); 
         // 清空数据 
         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));//按照权重值排序
         System.out.println();

         System.out.println("=============删=============");
         System.out.println("zset中删除元素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("统计zset集合中的元素中个数："+shardedJedis.zcard("zset"));
         System.out.println("统计zset集合中权重某个范围内（1.0——5.0），元素的个数："+shardedJedis.zcount("zset", 1.0, 5.0));
         System.out.println("查看zset集合中element004的权重："+shardedJedis.zscore("zset", "element004"));
         System.out.println("查看下标1到2范围内的元素值："+shardedJedis.zrange("zset", 1, 2));

     }

     private void HashOperate() 
     { 
         System.out.println();
         System.out.println("hash 功能 ：");
         //清空数据 
         System.out.println(jedis.flushDB()); 

         System.out.println("=============增=============");
         System.out.println("hashs中添加key001和value001键值对："+shardedJedis.hset("hashs", "key001", "value001")); 
         System.out.println("hashs中添加key002和value002键值对："+shardedJedis.hset("hashs", "key002", "value002")); 
         System.out.println("hashs中添加key003和value003键值对："+shardedJedis.hset("hashs", "key003", "value003"));
         System.out.println("新增key004和4的整型键值对："+shardedJedis.hincrBy("hashs", "key004", 4l));
         System.out.println("hashs中的所有值："+shardedJedis.hvals("hashs"));
         System.out.println();

         System.out.println("=============删=============");
         System.out.println("hashs中删除key002键值对："+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整型键值的值增加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("判断key003是否存在："+shardedJedis.hexists("hashs", "key003"));
         System.out.println("获取key004对应的值："+shardedJedis.hget("hashs", "key004"));
         System.out.println("批量获取key001和key003对应的值："+shardedJedis.hmget("hashs", "key001", "key003")); 
         System.out.println("获取hashs中所有的key："+shardedJedis.hkeys("hashs"));
         System.out.println("获取hashs中所有的value："+shardedJedis.hvals("hashs"));
         System.out.println();

     }

}

• 测试类：Redis/src/com/redis/Main.java

package com.redis;
public class Main {

    public static void main(String[] args) {
        System.out.println("-------------开始测试---------------");
        System.out.println();
        new RedisClient().show();
        System.out.println();
        System.out.println("-------------结束测试---------------");
    }
}

• 运行结果：

本文转载自异步社区。

原文链接：https://www.epubit.com/articleDetails?id=NC7E3EF90E420000195BC14D41C9317CA