工具类代码

package cn.com.yiyongcloud.testRedisLock;
import redis.clients.jedis.Jedis;
import java.util.Collections;
//redis实现分布式锁工具类
public class RedisLockUtil {
    private static final String LOCK_SUCCESS = "OK";
    private static final String SET_IF_NOT_EXIST = "NX";
    private static final String SET_WITH_EXPIRE_TIME = "PX";
    private static final Long RELEASE_SUCCESS = 1L;
    /**
     * 尝试获取分布式锁
     * @param jedis Redis客户端
     * @param lockKey 锁
     * @param requestId 请求标识
     * @param expireTime 超期时间
     * @return 是否获取成功
     */
    public static boolean tryGetDistributedLock(Jedis jedis, String lockKey, String requestId, int expireTime) {

        String result = jedis.set(lockKey, requestId, SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);
        if (LOCK_SUCCESS.equals(result)) {
            return true;
        }
        return false;
    }
    /**
     * 释放分布式锁
     * @param jedis Redis客户端
     * @param lockKey 锁
     * @param requestId 请求标识
     * @return 是否释放成功
     */
    public static boolean releaseDistributedLock(Jedis jedis, String lockKey, String requestId) {
        String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
        Object result = jedis.eval(script, Collections.singletonList(lockKey), Collections.singletonList(requestId));
        if (RELEASE_SUCCESS.equals(result)) {
            return true;
        }
        return false;
    }
}

测试

package cn.com.yiyongcloud.testRedisLock;
import org.junit.Test;
import redis.clients.jedis.Jedis;
public class TestRedisLock {
    @Test
    public void test1() {
        Jedis jedis=new Jedis("192.168.19.10",6379);
        boolean ok = RedisLockUtil.tryGetDistributedLock(jedis, "this_id_a_test", "/user/count", 100000);
        if (ok){
            System.out.println("获取锁成功---------------");
        }else{
            System.out.println("获取锁失败--------------");
        }
    }
    @Test
    public void test3() {
        Jedis jedis=new Jedis("192.168.19.10",6379);
        boolean ok = RedisLockUtil.releaseDistributedLock(jedis, "this_id_a_test", "/user/count");
        if (ok){
            System.out.println("释放锁成功---------------");
        }
    }
}