在Spring Boot中，你可以使用spring-boot-starter-data-redis库来实现基于Redis的分布式锁。以下是一个简单的例子，展示了如何使用Spring Boot和Redis实现分布式锁：
- 首先，在
pom.xml中添加依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>- 在Spring Boot应用中配置Redis：
spring:
redis:
host: localhost
port: 6379- 创建一个服务来管理分布式锁：
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;
import java.util.Collections;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
@Service
public class RedisLockService {
@Autowired
private StringRedisTemplate redisTemplate;
@Autowired
private DefaultRedisScript<Long> lockScript;
public String tryLock(String lockKey, long expireTime, TimeUnit unit) {
String identifier = UUID.randomUUID().toString();
long expireTimeInMillis = unit.toMillis(expireTime);
Boolean locked = redisTemplate.execute(lockScript, Collections.singletonList(lockKey), identifier.toString(), String.valueOf(expireTimeInMillis + 1000));
if (locked != null && locked) {
return identifier;
}
return null;
}
public void unlock(String lockKey, String identifier) {
String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
DefaultRedisScript<Long> unlockScript = new DefaultRedisScript<>();
unlockScript.setScriptText(script);
unlockScript.setResultType(Long.class);
Long result = redisTemplate.execute(unlockScript, Collections.singletonList(lockKey), identifier);
if (result != null && result.equals(1L)) {
// Successfully unlocked
}
}
}- 使用RedisLockService获取和释放锁：
public void someMethod() {
String lockKey = "some_lock_key";
long expireTime = 10;
TimeUnit unit = TimeUnit.SECONDS;
String identifier = redisLockService.tryLock(lockKey, expireTime, unit);
if (identifier != null) {
try