:sparkles: Introducing new feature.try-with-resource

[hlxing]

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [x] Feature
• [ ] Code style update
• [ ] Refactor
• [ ] Build-related changes
• [ ] Other, please describe:

The description of the PR: 字符缓冲输入流没有关闭，采用 try-with-resource 优雅地关闭流。

Other information: