Redis分布式锁加时效和不加时效两种方案的最全代码实现

 锁住3秒：

@Autowired
private RedisTemplate redisTemplate;

String withdrawals_apply_key = WITHDRAWALS_REDIS_KEY+driver.getId();
boolean flag = redisTemplate.opsForValue().setIfAbsent(withdrawals_apply_key,WITHDRAWALS_LOCK);
log.info("任务是否获取到锁:" + flag);
if (flag) {
    redisTemplate.expire(withdrawals_apply_key,3,TimeUnit.SECONDS);
    //要锁住的代码
    。。。。。。
}else{
    log.info("任务没有获取到锁，不执行!");
    return;
}

锁不设置时效：

@Autowired
private RedisTemplate redisTemplate;

boolean flag = false;
try{
    flag = redisTemplate.opsForValue().setIfAbsent(REDIS_KEY, LOCK);
    log.info("是否获取到锁:" + flag);
    if (flag){
        //要锁住的代码
        。。。。。。
    }else {
        log.info("没有获取到锁，不执行定时任务!");
        return;
    }
}finally {
    if (flag) {
        redisTemplate.delete(REDIS_KEY);
        log.info("任务结束，释放锁!");
    } else {
        log.info("没有获取到锁，无需释放锁!");
    }
}

 redis的配置类（springboot）：

import com.fengyuncx.common.utils.json.FastJsonRedisSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.*;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPoolConfig;

import java.time.Duration;

@Configuration
@EnableCaching
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig {


    @Value("${spring.driverRedis.host}")
    private String host;

    @Value("${spring.driverRedis.port}")
    private int port;

    @Value("${spring.driverRedis.password}")
    private String password;

    @Value("${spring.driverRedis.maxTotal}")
    private Integer maxTotal;

    @Value("${spring.driverRedis.maxIdle}")
    private Integer maxIdle;

    @Value("${spring.driverRedis.maxWaitMillis}")
    private Integer maxWaitMillis;

    @Value("${spring.driverRedis.timeout}")
    private int timeout;

    @Value("${spring.driverRedis.database}")
    private int database;


    @Primary
    @Bean
    public RedisConnectionFactory cacheBusinessRedisConnectionFactory() {

        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxTotal(maxTotal);
        poolConfig.setMaxIdle(maxIdle);
        poolConfig.setMaxWaitMillis(maxWaitMillis);
        poolConfig.setTestOnBorrow(true);
        poolConfig.setTestOnReturn(false);
        poolConfig.setTestWhileIdle(true);
        JedisClientConfiguration clientConfig = JedisClientConfiguration.builder()
                .usePooling().poolConfig(poolConfig).and().readTimeout(Duration.ofMillis(timeout)).build();

        // 单点redis
        RedisStandaloneConfiguration redisConfig = new RedisStandaloneConfiguration();
        // 哨兵redis
        // RedisSentinelConfiguration redisConfig = new RedisSentinelConfiguration();
        // 集群redis
        // RedisClusterConfiguration redisConfig = new RedisClusterConfiguration();
        redisConfig.setHostName(host);
        redisConfig.setPassword(RedisPassword.of(password));
        redisConfig.setPort(port);
        redisConfig.setDatabase(database);

        return new JedisConnectionFactory(redisConfig, clientConfig);

    }

    /**
     * 管理缓存 springboot2
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public RedisCacheManager redisCacheManager(RedisTemplate redisTemplate) {

        //初始化一个RedisCacheWriter
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisTemplate.getConnectionFactory());

        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(redisTemplate.getValueSerializer()));//设置序列化
        //设置默认超过期时间是30秒
        redisCacheConfiguration.entryTtl(Duration.ofSeconds(30));
        //初始化RedisCacheManager
        RedisCacheManager cacheManager = new RedisCacheManager(redisCacheWriter, redisCacheConfiguration);
        return cacheManager;
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> template = new RedisTemplate<>();

//        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
//        template.setValueSerializer(jackson2JsonRedisSerializer);
//        template.setHashValueSerializer(jackson2JsonRedisSerializer);


        //使用fastjson序列化
        FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
//
        template.setConnectionFactory(cacheBusinessRedisConnectionFactory());
        return template;
    }


    /**
     * 对hash类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public HashOperations<String, String, Object> hashOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForHash();
    }

    /**
     * 对redis字符串类型数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ValueOperations<String, Object> valueOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForValue();
    }

    /**
     * 对链表类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ListOperations<String, Object> listOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForList();
    }

    /**
     * 对无序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public SetOperations<String, Object> setOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForSet();
    }

    /**
     * 对有序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ZSetOperations<String, Object> zSetOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForZSet();
    }
}

application.yml配置内容：

spring:
  driverRedis:
    host: 192.168.101.100
    port: 6379
    password: 123456
    maxIdle: 300
    maxTotal: 600
    maxWaitMillis: 1000
    timeout: 3000
    database: 4
  dictRedis:
    host: 192.168.101.100
    port: 6379
    password: 123456
    maxIdle: 300
    maxTotal: 600
    maxWaitMillis: 1000
    timeout: 3000
    database: 0