在java中使用redis

在java中使用redis很简单，只需要添加jedist.jar，通过它的api就可以了。而且，api和redis的语法几乎完全相同。以下简单的测试：

参考：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;

/**
* 学习使用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是否运行
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","存储变量foo");
Boolean is = jedis.exists("foo");
System.out.println("foo是否存在："+is);

Set<String> keys = jedis.keys("*");
System.out.println("数据库中所有的keys:"+keys);

Set<String> keys1 = jedis.keys("f*");
System.out.println("数据库中以 f 为前缀的keys"+keys1);

String foo = jedis.type("foo");
System.out.println("foo的类型："+foo);

jedis.del("foo");
}

/**
* jedis存储字符串
*/
@Test
public void testString(){
jedis.flushDB();
//--添加数据--
jedis.set("name","miao");
System.out.println("取出name:"+jedis.get("name"));

//取出元数据，并修改
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("获取value值并截取（中文容易乱码）："+name1);
//--覆盖--
jedis.set("name","覆盖了");
System.out.println("取出重设置后的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("删除后的name:"+jedis.get("name"));
//设置多个
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();
//--添加数据--
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");

//删除某个属性
jedis.hdel("user","birth");
System.out.println(jedis.hmget("user","name","age","birth"));
Long count = jedis.hlen("user");//user的属性的个数
System.out.println("属性个数："+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的所有属性
System.out.println(ukeys);
List<String> uvals = jedis.hvals("user");//user的所有属性值
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("（注意顺序）插入的结果："+jedis.lrange("users",0,-1));
//长度
Long len = jedis.llen("users");
System.out.println("list长度："+len);
//子串
System.out.println("取出索引0到1的数据："+jedis.lrange("users",0,1));
//修改单个值
jedis.lset("users",0,"我变成第一个");
System.out.println("修改单个值后："+jedis.lrange("users",0,-1));
//获取指定下标的值
String users1 = jedis.lindex("users", 0);
System.out.println("下标0为："+users1);
//删除指定下标的值
Long lrem = jedis.lrem("users", 0,"我变成第一个");
System.out.println("删除下标0结果："+lrem+"   |"+jedis.lrange("users",0,-1));
//删除区间之外的值
//        jedis.ltrim("users",1,2);
//出栈
String users2 = jedis.lpop("users");
System.out.println("左出栈："+users2+"  |"+jedis.lrange("users",0,-1));
String users3 = jedis.rpop("users");
System.out.println("右出栈："+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"));
//判断是否存在
Boolean is = jedis.sismember("user", "rui");
System.out.println("rui是否存在： "+is);
//随机取出一个
String one = jedis.srandmember("user");
System.out.println(one);
System.out.println(jedis.srandmember("user",2));
//返回个数
Long count = jedis.scard("user");
System.out.println("user个数："+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("排序不影响原存储："+jedis.lrange("list",0,-1));
}

}