Java工具库：

1.  重试框架：

https://docs.spring.io/spring-batch/trunk/reference/html/retry.html

<dependency>
<groupId>org.springframework.retry</groupId>
<artifactId>spring-retry</artifactId>
<version>${spring.retry.version}</version>
</dependency>

2. IO流：

https://www.cnblogs.com/xing901022/p/5978989.html

<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${common_io.version}</version>
</dependency>

3. Collections工具

 https://www.cnblogs.com/Eddyer/p/6025356.html

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.1</version>
</dependency>