import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import redis.clients.jedis.Jedis;/** * redis測試搶購 *  * @author 10255_000 *  */public class RedisTest { public static void main(String[] args) {  final String watchkeys = "watchkeys";  ExecutorService executor = Executors.newFixedThreadPool(20);  final Jedis jedis = new Jedis("192.168.3.202", 6379);  jedis.set(watchkeys, "0");// 重置watchkeys為0  jedis.del("setsucc", "setfail");// 清空搶成功的，與沒有成功的  jedis.close();  for (int i = 0; i < 10000; i++) {// 測試一萬人同時訪問   executor.execute(new MyRunnable());  }  executor.shutdown(); }}import java.util.List;import java.util.UUID;import redis.clients.jedis.Jedis;import redis.clients.jedis.Transaction;public class MyRunnable implements Runnable { String watchkeys = "watchkeys";// 監(jiān)視keys Jedis jedis = new Jedis("192.168.3.202", 6379); public MyRunnable() { } @Override public void run() {  try {   jedis.watch(watchkeys);// watchkeys   String val = jedis.get(watchkeys);   int valint = Integer.valueOf(val);   String userifo = UUID.randomUUID().toString();   if (valint < 10) {    Transaction tx = jedis.multi();// 開啟事務    tx.incr("watchkeys");    List<Object> list = tx.exec();// 提交事務，如果此時watchkeys被改動了，則返回null    if (list != null) {     System.out.println("用戶：" + userifo + "搶購成功，當前搶購成功人數(shù):"       + (valint + 1));     /* 搶購成功業(yè)務邏輯 */     jedis.sadd("setsucc", userifo);    } else {     System.out.println("用戶：" + userifo + "搶購失敗");     /* 搶購失敗業(yè)務邏輯 */     jedis.sadd("setfail", userifo);    }   } else {    System.out.println("用戶：" + userifo + "搶購失敗");    jedis.sadd("setfail", userifo);    // Thread.sleep(500);    return;   }  } catch (Exception e) {   e.printStackTrace();  } finally {   jedis.close();  } }}