我有将文件复制到其他位置的代码。尝试复制大文件时出现NIO错误
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();
}
}
}
}
虽然复制小块,比如300-400 Mb,但一切都像魔术一样工作。但是,当我试图复制1.5 Gb大小的文件时,它失败了。堆栈是:
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)
我没有与NIO密切合作。你能帮我解决吗?提前谢谢你。
尝试使用Files.copy http://guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/common/io/Files.html如果它有效,请在src中查看 – oluies 2011-01-12 08:28:17
谢谢。但我宁愿不在这个特定的情况下使用第三方库。 – 2011-01-12 08:29:54