如何优雅实现分布式锁-Redisson

1、引入jar包

<!-- 引入 redis 依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson</artifactId>
    <version>3.14.1</version>
</dependency>

2、添加配置

package com.wisedu.portal.config;
​
import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
​
@Configuration
public class RedissonConfig {
​
    @Value("${spring.redis.host}")
    private String host;
​
    @Value("${spring.redis.port}")
    private String port;
​
    @Value("${spring.redis.password}")
    private String password;
​
    @Value("${spring.redis.database}")
    private Integer database;
​
    @Bean
    public RedissonClient redissonClient(){
        Config config = new Config();
        config.useSingleServer().setAddress("redis://" + host + ":" + port).setPassword(password).setDatabase(database);
        return Redisson.create(config);
    }
​
}

3、编写代码

@Autowired
@Qualifier("redissonClient")
private RedissonClient redissonClient;
RLock lock = redissonClient.getLock("contract_no");
​
try {
    lock.lock();
    // 执行业务代码
}finally {
    lock.unlock();
}

4、备注

redis的版本号要在4.0以上，否则redisson调用失败