在java中使用redis

在java中使用redis很簡單，只需要添加jedist.jar，通過它的api就可以了。而且，api和redis的語法幾乎完全相同。以下簡單的測試：

參考：http://www.runoob.com/redis/redis-java.html

package com.test.redis;

import org.junit.Test;
import redis.clients.jedis.Jedis;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * 學習使用redis
 * Created by Administrator on 2016/2/19.
 */
public class HelloRedis {
    private static final Jedis jedis = new Jedis("127.0.0.1",6379);

    public static void main(String[] args) {
        jedis.set("test","Hello Redis");
        String test = jedis.get("test");
        System.out.println(test);
        jedis.del("test");
    }

    /**
     * 一些操作
     */
    @Test
    public void testOption(){
        //查看redis是否運行
        System.out.println(jedis.ping());
        String s = jedis.flushDB();
        System.out.println("清空后："+s);

        System.out.println(jedis.echo("foo"));

        jedis.set("foo","存儲變量foo");
        Boolean is = jedis.exists("foo");
        System.out.println("foo是否存在："+is);

        Set<String> keys = jedis.keys("*");
        System.out.println("數據庫中所有的keys:"+keys);

        Set<String> keys1 = jedis.keys("f*");
        System.out.println("數據庫中以 f 為前綴的keys"+keys1);

        String foo = jedis.type("foo");
        System.out.println("foo的類型："+foo);

        jedis.del("foo");
    }

    /**
     * jedis存儲字符串
     */
    @Test
    public void testString(){
        jedis.flushDB();
        //--添加數據--
        jedis.set("name","miao");
        System.out.println("取出name:"+jedis.get("name"));

        //取出元數據，並修改
        String name = jedis.getSet("name", "被取出后修改");
        System.out.println("取出："+name+" 修改："+jedis.get("name"));
        String name1 = jedis.getrange("name", 0,5 );
        System.out.println("獲取value值並截取（中文容易亂碼）："+name1);
        //--覆蓋--
        jedis.set("name","覆蓋了");
        System.out.println("取出重設置后的name:"+jedis.get("name"));
        //拼接
        jedis.append("name"," be stronger!");
        System.out.println("拼接后的name:"+jedis.get("name"));

        jedis.del("name");
        System.out.println("刪除后的name:"+jedis.get("name"));
        //設置多個
        jedis.mset("name","miao","age","25","birth","1991-02-22");
        jedis.incr("age");//+1
        System.out.println(jedis.get("name")+"-"+jedis.get("age")+"-"+jedis.get("birth"));
        jedis.del("name","age","birth");
    }

    /**
     * redis操作map
     */
    @Test
    public void testMap(){
        jedis.flushDB();
        //--添加數據--
        Map<String,String> map = new HashMap<>();
        map.put("name","miao");
        map.put("age","35");
        map.put("birth","1991-02-33");
        jedis.hmset("user",map);
        //取出
        List<String> user = jedis.hmget("user","name","age","birth");
        System.out.println(user);
        Map<String, String> user1 = jedis.hgetAll("user");//取出user
        System.out.println("user1="+user1);
//        jedis.del("user");

        //刪除某個屬性
        jedis.hdel("user","birth");
        System.out.println(jedis.hmget("user","name","age","birth"));
        Long count = jedis.hlen("user");//user的屬性的個數
        System.out.println("屬性個數："+count);
        Boolean is = jedis.exists("user");//是否存在
        System.out.println("是否存在："+is);
        Set<String> ukeys = jedis.hkeys("user");//user的所有屬性
        System.out.println(ukeys);
        List<String> uvals = jedis.hvals("user");//user的所有屬性值
        System.out.println(uvals);

        jedis.del("user");
    }

    /**
     * redis操作list
     */
    @Test
    public void testList(){
        jedis.flushDB();
        //查看
        List<String> users = jedis.lrange("users", 0, -1);
        System.out.println("list:"+users);
        //向左插入
        jedis.lpush("users","miao");
        jedis.lpush("users","rui");
        jedis.lpush("users","feng");
        //向右插入
        jedis.rpush("users","ming");
        jedis.rpush("users","hong");
        jedis.rpush("users","xing");
        System.out.println("（注意順序）插入的結果："+jedis.lrange("users",0,-1));
        //長度
        Long len = jedis.llen("users");
        System.out.println("list長度："+len);
        //子串
        System.out.println("取出索引0到1的數據："+jedis.lrange("users",0,1));
        //修改單個值
        jedis.lset("users",0,"我變成第一個");
        System.out.println("修改單個值后："+jedis.lrange("users",0,-1));
        //獲取指定下標的值
        String users1 = jedis.lindex("users", 0);
        System.out.println("下標0為："+users1);
        //刪除指定下標的值
        Long lrem = jedis.lrem("users", 0,"我變成第一個");
        System.out.println("刪除下標0結果："+lrem+"   |"+jedis.lrange("users",0,-1));
        //刪除區間之外的值
//        jedis.ltrim("users",1,2);
        //出棧
        String users2 = jedis.lpop("users");
        System.out.println("左出棧："+users2+"  |"+jedis.lrange("users",0,-1));
        String users3 = jedis.rpop("users");
        System.out.println("右出棧："+users3+"  |"+jedis.lrange("users",0,-1));

        jedis.del("users");
        System.out.println(jedis.lrange("users",0,-1));
    }

    /**
     * jedis set
     */
    @Test
    public void testSet(){
        //添加
        jedis.sadd("user","miao");
        jedis.sadd("user","rui");
        jedis.sadd("user","feng");
        jedis.sadd("user","ming");
        jedis.sadd("user","hong");
        jedis.sadd("user","xing");
        //查看
        Set<String> user = jedis.smembers("user");
        System.out.println("set:   "+user);
        //移除
        jedis.srem("user","miao");
        System.out.println("移除后： "+jedis.smembers("user"));
        //判斷是否存在
        Boolean is = jedis.sismember("user", "rui");
        System.out.println("rui是否存在： "+is);
        //隨機取出一個
        String one = jedis.srandmember("user");
        System.out.println(one);
        System.out.println(jedis.srandmember("user",2));
        //返回個數
        Long count = jedis.scard("user");
        System.out.println("user個數："+count);

        jedis.del("user");

    }

    /**
     * zset
     * 有序的set
     */
    @Test
    public void testZset(){
        jedis.flushDB();
        //添加
        jedis.zadd("zkey",12.1,"十二");
        jedis.zadd("zkey",11.1,"11");
        jedis.zadd("zkey",21.1,"20");
        jedis.zadd("zkey",41.1,"41");
        jedis.zadd("zkey",4,"4");
        //查看
        Set<String> zkey = jedis.zrange("zkey", 0, -1);
        System.out.println("可以看到是以score排序的："+zkey);
    }

    /**
     * 排序
     */
    @Test
    public void testSort(){
        jedis.del("list");
        jedis.rpush("list","1");
        jedis.rpush("list","4");
        jedis.rpush("list","2");
        jedis.rpush("list","20");
        jedis.rpush("list","5");
        jedis.rpush("list","6");
        jedis.rpush("list","67");
        System.out.println(jedis.lrange("list",0,-1));
        System.out.println("排序："+jedis.sort("list"));
        System.out.println("排序不影響原存儲："+jedis.lrange("list",0,-1));
    }



}