如何简化/重用这个异常处理代码 [英] How to simplify/reuse this exception handling code

问题描述

  BufferedWriter w = null; //或任何其他抛出异常并且需要关闭的对象
 try {
 w = new BufferedWriter（new FileWriter（file））; 
 //用w 
} catch（IOException e）{
 e.printStackTrace（）; 
} finally {
 if（w！= null）{
 try {
 w.close（）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
} 
} 
  

它通常涉及一个对象抛出异常并需要关闭，并且关闭它也可能会引发异常。

我想知道上述代码是否可以以任何方式简化或重用。

解决方案

我通常把你的最终的内容块放在帮忙中。像这样

  void close（Closeable c）{
 if（c！= null）{
 try {
 c.close（）; 
} catch（IOException e）{
 //执行日志记录或只是忽略错误
} 
} 
} 
  / pre> 
 
 
 接口由许多类（输入流，数据库连接等）实现，所以这是一般通用助手。
 
I tend to write code like the following a lot:
BufferedWriter w = null; // Or any other object that throws exceptions and needs to be closed
try {
    w = new BufferedWriter(new FileWriter(file));
    // Do something with w
} catch (IOException e) {
    e.printStackTrace();
} finally {
    if (w != null) {
        try {
            w.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
It usually involves an object that throws exceptions and needs to be closed, and that closing it may also throw an exception. 

I was wondering if the above code can be simplified or reused in any way.
解决方案
I usually put contents of your finally block in a helper. Like this
void close(Closeable c) {
    if (c != null) {
        try {
            c.close();
        } catch (IOException e) {
            // perform logging or just ignore error
        }
    }
}
Closeable interface is implemented by many classes (input streams, database connections, etc), so this is kinda general-purpose helper.

                        
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