在最终块中抛出异常

exception java try-catch finally

2022-08-31 10:16:17

有没有一种优雅的方法来处理在块中抛出的异常？finally

例如：

try {
  // Use the resource.
}
catch( Exception ex ) {
  // Problem with the resource.
}
finally {
   try{
     resource.close();
   }
   catch( Exception ex ) {
     // Could not close the resource?
   }
}

你如何避免/在块中？trycatchfinally

答案 1

我通常这样做：

try {
  // Use the resource.
} catch( Exception ex ) {
  // Problem with the resource.
} finally {
  // Put away the resource.
  closeQuietly( resource );
}

别处：

protected void closeQuietly( Resource resource ) {
  try {
    if (resource != null) {
      resource.close();
    }
  } catch( Exception ex ) {
    log( "Exception during Resource.close()", ex );
  }
}

答案 2

我通常使用以下方法之一：closeQuietlyorg.apache.commons.io.IOUtils

public static void closeQuietly(OutputStream output) {
    try {
        if (output != null) {
            output.close();
        }
    } catch (IOException ioe) {
        // ignore
    }
}