我有將文件複製到其他位置的代碼。嘗試複製大文件時出現NIO錯誤
public static void copyFile(String sourceDest, String newDest) throws IOException {
File sourceFile = new File(sourceDest);
File destFile = new File(newDest);
if (!destFile.exists()) {
destFile.createNewFile();
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
destination.transferFrom(source, 0, source.size());
} finally {
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
}
}
雖然複製小塊,比如300-400 Mb,但一切都像魔術一樣工作。但是,當我試圖複製1.5 Gb大小的文件時,它失敗了。堆棧是:
run: 12.01.2011 11:16:36 FileCopier main SEVERE: Exception occured while copying file. Try again. java.io.IOException: Map failed at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:748) at sun.nio.ch.FileChannelImpl.transferFromFileChannel(FileChannelImpl.java:527) at sun.nio.ch.FileChannelImpl.transferFrom(FileChannelImpl.java:590) at FileCopier.copyFile(FileCopier.java:64) at FileCopier.main(FileCopier.java:27) Caused by: java.lang.OutOfMemoryError: Map failed at sun.nio.ch.FileChannelImpl.map0(Native Method) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:745) ... 4 more BUILD SUCCESSFUL (total time: 0 seconds)
我沒有與NIO密切合作。你能幫我解決嗎?提前謝謝你。
嘗試使用Files.copy http://guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/common/io/Files.html如果它有效,請在src中查看 – oluies 2011-01-12 08:28:17
謝謝。但我寧願不在這個特定的情況下使用第三方庫。 – 2011-01-12 08:29:54