通过JAVA NIO 非直接缓冲区拷贝文件
/**
* 通过JAVA NIO 非直接缓冲区拷贝文件
*
* @param sourcePath 源文件路径
* @param targetPath 目标文件路径
*/
public static void copyFileByChannel(String sourcePath, String targetPath) {
FileChannel outChannel = null;
FileChannel inChannel = null;
FileInputStream fis = null;
FileOutputStream fos = null;
try {
fis = new FileInputStream(sourcePath);
fos = new FileOutputStream(targetPath);
//获取通道
inChannel = fis.getChannel();
outChannel = fos.getChannel();
//分配指定大小的缓冲区
ByteBuffer buf = ByteBuffer.allocate(1024);
while (inChannel.read(buf) != -1) {
//转换为读取数据模式
buf.flip();
//写入到磁盘
outChannel.write(buf);
//清空缓冲区
buf.clear();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭流
try {
if (outChannel != null) {
outChannel.close();
}
if (inChannel != null) {
inChannel.close();
}
if (fis != null) {
fis.close();
}
if (fos != null) {
fos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
} 
