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));
     }

 }