javaredis实现抢购秒杀

package com.bicon.basedemo.controller;

import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.annotation.Resource;

import org.omg.CORBA.PRIVATE_MEMBER;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;


@RestController
@RequestMapping("/test")
public class test {
    
//    @Resource
//    RedisOperation redisOps;
    
    @Resource
    private JedisPool jedisPool;

    @RequestMapping("/redis")
    public void redisTest() {
        Jedis jedis = jedisPool.getResource();
        final String watchkeys = "watchkeys";
        ExecutorService executor = Executors.newFixedThreadPool(20);  //20个线程池并发数

        jedis.set(watchkeys, "10");//设置起始的抢购数
       // jedis.del("setsucc", "setfail");
        jedis.close();
         
        for (int i = 0; i < 101; i++) {//设置101个人来发起抢购 模拟101个人抢购
            executor.execute(new MyRunnable(jedisPool));
        }
        executor.shutdown();
    }
    
     public static String getRandomString(int length) { //length是随机字符串长度
         String base = "abcdefghijklmnopqrstuvwxyz0123456789";  
         Random random = new Random();  
         StringBuffer sb = new StringBuffer();  
         for (int i = 0; i < length; i++) {  
             int number = random.nextInt(base.length());  
             sb.append(base.charAt(number));  
         }  
         return sb.toString();  
      } 
}

package com.bicon.basedemo.controller;

import java.util.List;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.Transaction;

public class MyRunnable implements Runnable{
    
    
    private JedisPool jedisPool;
    String userinfo;
    String watchkeys = "watchkeys";
    public MyRunnable(JedisPool jedisPoo){
        jedisPool = jedisPoo;
    };
    
    public void run() {
        Jedis jedis = jedisPool.getResource();
        try {
            jedis.watch(watchkeys);// watchkeys
 
            String val = jedis.get(watchkeys);
            int valint = Integer.valueOf(val);
            
            if (valint <= 100 && valint>=1) {
            
                 Transaction tx = jedis.multi();// 开启事务
               // tx.incr("watchkeys");
                tx.incrBy("watchkeys", -1);
 
                List<Object> list = tx.exec();// 提交事务，如果此时watchkeys被改动了，则返回null
                 
                if (list == null ||list.size()==0) {
                    System.out.println("重新抢购");
                    this.run();
                    return;
                } else {
                    for(Object succ : list){
                         String succuserifo ="succ"+succ.toString() +userinfo ;
                         String succinfo="用户：" + succuserifo + "抢购成功，当前抢购成功人数:"
                                 + (1-(valint-10));
                         System.out.println(succinfo);
                         /* 抢购成功业务逻辑 */
                         jedis.setnx(succuserifo, succinfo);
                    }
                }
            } else {
                    String failuserifo ="kcfail" +  userinfo;
                    String failinfo1="用户：" + failuserifo + "商品被抢购完毕，抢购失败";
                    System.out.println(failinfo1);
                    jedis.setnx(failuserifo, failinfo1);
                    return;
            }
 
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            jedis.close();
        }
    }

}