Redis的Java客户端Jedis

先决条件

• jdk
• idea/eclipse
• Jedis所需要的jar包
  • Commons-pool-1.6.jar
  • Jedis-2.1.0.jar
• Jedis常用操作
  • 测试连通性

package cn.lonsun.staticcenter.controller;

import redis.clients.jedis.Jedis;

public class RedisController{
    public static void main(String[] args) {
        //连接本地jedis
        Jedis jedis = new Jedis("127.0.0.1",6379);
        //查看服务是否运行 打出pong表示成功
        System.out.println("connection is ok==============>"+jedis.ping());
    }

}

• 5+1(一个key、五大数据类型)

 public static void main(String[] args) 
  {
 
     Jedis jedis = new Jedis("127.0.0.1",6379);
     //key
     Set<String> keys = jedis.keys("*");
     for (Iterator iterator = keys.iterator(); iterator.hasNext();) {
       String key = (String) iterator.next();
       System.out.println(key);
     }
     System.out.println("jedis.exists====>"+jedis.exists("k2"));
     System.out.println(jedis.ttl("k1"));
     //String
     //jedis.append("k1","myreids");
     System.out.println(jedis.get("k1"));
     jedis.set("k4","k4_redis");
     System.out.println("----------------------------------------");
     jedis.mset("str1","v1","str2","v2","str3","v3");
     System.out.println(jedis.mget("str1","str2","str3"));
     //list
     System.out.println("----------------------------------------");
     //jedis.lpush("mylist","v1","v2","v3","v4","v5");
     List<String> list = jedis.lrange("mylist",0,-1);
     for (String element : list) {
       System.out.println(element);
     }
     //set
     jedis.sadd("orders","jd001");
     jedis.sadd("orders","jd002");
     jedis.sadd("orders","jd003");
     Set<String> set1 = jedis.smembers("orders");
     for (Iterator iterator = set1.iterator(); iterator.hasNext();) {
       String string = (String) iterator.next();
       System.out.println(string);
     }
     jedis.srem("orders","jd002");
     System.out.println(jedis.smembers("orders").size());
     //hash
     jedis.hset("hash1","userName","lisi");
     System.out.println(jedis.hget("hash1","userName"));
     Map<String,String> map = new HashMap<String,String>();
     map.put("telphone","13811814763");
     map.put("address","atguigu");
     map.put("email","abc@163.com");
     jedis.hmset("hash2",map);
     List<String> result = jedis.hmget("hash2", "telphone","email");
     for (String element : result) {
       System.out.println(element);
     }
     //zset
     jedis.zadd("zset01",60d,"v1");
     jedis.zadd("zset01",70d,"v2");
     jedis.zadd("zset01",80d,"v3");
     jedis.zadd("zset01",90d,"v4");
     
     Set<String> s1 = jedis.zrange("zset01",0,-1);
     for (Iterator iterator = s1.iterator(); iterator.hasNext();) {
       String string = (String) iterator.next();
       System.out.println(string);
     }
 
          
  }

• 事务提交

　　　　1.日常

　　　　　

 public static void main(String[] args) {
        //连接本地jedis
        Jedis jedis = new Jedis("127.0.0.1",6379);
        //查看服务是否运行 打出pong表示成功
        System.out.println("connection is ok==============>"+jedis.ping());

        //监控key，该操作关闭事务
        /*3
        jedis.watch("serialNum");
        jedis.set("serialNum","##########");
        jedis.unwatch();*/
        Transaction transaction = jedis.multi();
        Response<String> response = transaction.get("serialNum");
        transaction.set("serialNum","s002");
        response=transaction.get("serialNum");
        transaction.lpush("list3","a");
        transaction.lpush("list3","b");
        transaction.lpush("list3","c");

        transaction.exec();
        //2 transaction.discard();
        System.out.println("serialNum***********"+response.get());

    }

　　　　2.加锁

　　　　

public boolean transMethod() {
        //连接本地jedis
        Jedis jedis = new Jedis("127.0.0.1",6379);
        //查看服务是否运行 打出pong表示成功
        System.out.println("connection is ok==============>"+jedis.ping());
        int balace;//可用余额
        int debt;//欠额
        int amtToSubstract=10;//实刷额度

        jedis.watch("balace");
        balace=Integer.parseInt(jedis.get("balace"));
        if(balace<amtToSubstract){//额度不够
            jedis.unwatch();
            System.out.println("modify");
            return false;
        }else{
            System.out.println("***********transaction");
            Transaction transaction = jedis.multi();
            transaction.decrBy("balace",amtToSubstract);
            transaction.incrBy("debt",amtToSubstract);
            transaction.exec();
            balace = Integer.parseInt(jedis.get("balance"));
            debt = Integer.parseInt(jedis.get("debt"));

            System.out.println("*******" + balace);
            System.out.println("*******" + debt);
            return true;


        }

• 主从复制

public static void main(String[] args) throws InterruptedException 
  {
     Jedis jedis_M = new Jedis("127.0.0.1",6379);
     Jedis jedis_S = new Jedis("127.0.0.1",6380);
     
     jedis_S.slaveof("127.0.0.1",6379);
     
     jedis_M.set("k6","v6");
     Thread.sleep(500);
     System.out.println(jedis_S.get("k6"));
  }