package com.robert.RedisTest;import redis.clients.jedis.Jedis;public class RedisClient {        public static void main(String[] args) {        System.out.println(getHongBao());        System.out.println();    }        public static void doAppend(StringBuilder script,String expression){        script.append(expression+"\n");    }        public static int getHongBao(){        Jedis jedis = new Jedis("localhost", 6379);        jedis.set("name","robert");        StringBuilder script = new StringBuilder();        doAppend(script,"local result = 0");        doAppend(script,"local afterDescNum = redis.call(‘decr‘, KEYS[1])");        doAppend(script,"if afterDescNum>=0 then");        doAppend(script,"result=1");        doAppend(script,"else ");        doAppend(script,"result=0");        doAppend(script,"redis.call(‘set‘, KEYS[1], 0)");        doAppend(script,"end");        script.append("return result");        Object result = jedis.eval(script.toString(),1,"hongbaoNum");        int flag = Integer.parseInt(String.valueOf(result));        System.out.println(Thread.currentThread().getName()+" : "+flag);        return flag;    }}

local result = 0local afterDescNum = redis.call(‘decr‘, KEYS[1])if afterDescNum>=0 thenresult=1else result=0redis.call(‘set‘, KEYS[1], 0)endreturn result