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这篇文章给大家分享的是有关如何通过JAVA NIO通道传输拷贝文件的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
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通过JAVA NIO 通道传输拷贝文件
方式一
/**
* 通过JAVA NIO 通道传输拷贝文件
*
* @param sourcePath 源文件路径
* @param targetPath 目标文件路径
*/
public static void copyFileByChannelTransfer(String sourcePath, String targetPath) {
FileChannel inChannel = null;
FileChannel outChannel = null;
try {
//获取通道
inChannel = FileChannel.open(Paths.get(sourcePath), StandardOpenOption.READ);
outChannel = FileChannel.open(Paths.get(targetPath),StandardOpenOption.WRITE,StandardOpenOption.READ,StandardOpenOption.CREATE);
inChannel.transferTo(0,inChannel.size(),outChannel);
} catch (IOException e) {
e.printStackTrace();
}finally {
//关闭流
try {
if (outChannel != null) {
outChannel.close();
}
if (inChannel != null) {
inChannel.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}方式二
/**
* 通过JAVA NIO 通道传输拷贝文件
*
* @param sourcePath 源文件路径
* @param targetPath 目标文件路径
*/
public static void copyFileByChannelTransfer2(String sourcePath, String targetPath) {
FileInputStream fis = null;
FileOutputStream fos = null;
FileChannel inChannel = null;
FileChannel outChannel = null;
try {
fis = new FileInputStream(sourcePath);
fos = new FileOutputStream(targetPath);
//获取通道
inChannel = fis.getChannel();
outChannel = fos.getChannel();
inChannel.transferTo(0,inChannel.size(),outChannel);
} catch (IOException e) {
e.printStackTrace();
}finally {
//关闭流
try {
if (outChannel != null) {
outChannel.close();
}
if (inChannel != null) {
inChannel.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}使用示例
String source = "e:\\demo\\纵天神帝.txt";
String target = "e:\\demo\\";
long time1 = System.currentTimeMillis();
copyFileByStream(source, target + "1.txt");
System.out.println("通过字节流实现文件的拷贝耗时：" + (System.currentTimeMillis() - time1));
long time2 = System.currentTimeMillis();
copyFileByReaderAndWriter(source, target + "2.txt");
System.out.println("通过字符流实现文件的拷贝耗时：" + (System.currentTimeMillis() - time2));
long time3 = System.currentTimeMillis();
copyFileByBuffered(source, target + "3.txt");
System.out.println("通过字节缓冲流实现文件的拷贝耗时：" + (System.currentTimeMillis() - time3));
long time4 = System.currentTimeMillis();
copyFileByBufferedChar(source, target + "4.txt");
System.out.println("通过字符缓冲流实现文件的拷贝耗时：" + (System.currentTimeMillis() - time4));
long time5 = System.currentTimeMillis();
copyFileByChannel(source, target + "5.txt");
System.out.println("通过JAVA NIO通道（非直接缓冲区）实现文件的拷贝耗时：" + (System.currentTimeMillis() - time5));
long time6 = System.currentTimeMillis();
copyFileByChannelBufferd(source, target + "6.txt");
System.out.println("通过JAVA NIO通道（直接缓冲区）实现文件的拷贝耗时：" + (System.currentTimeMillis() - time6));
long time7 = System.currentTimeMillis();
copyFileByChannelTransfer(source, target + "7.txt");
System.out.println("通过JAVA NIO通道传输实现文件的拷贝耗时：" + (System.currentTimeMillis() - time7));
long time8 = System.currentTimeMillis();
copyFileByChannelTransfer(source, target + "8.txt");
System.out.println("通过JAVA NIO通道传输2实现文件的拷贝耗时：" + (System.currentTimeMillis() - time8));感谢各位的阅读！关于“如何通过JAVA NIO通道传输拷贝文件”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
