NIO拷贝文件示例

package org.lanqiao.nio;import java.io.File;import java.io.IOException;import java.io.RandomAccessFile;import java.nio.channels.FileChannel;import java.nio.file.OpenOption;public class FileCopy {  public static void main(String[] args) throws IOException {    String path1 = "E:\\workspace\\c\\hello.c";    String path2 = "E:\\workspace\\c\\hello.cc";    copy(path1,path2);  }  /**   * 从src指定的路径拷贝到dest指定的位置   * @param src   * @param dest   * @throws IOException   */  private static void copy(String src, String dest) throws IOException {    FileChannel srcChannel = FileChannel.open( new File( src ).toPath()) ;    File destFile = new File( dest );    if (!destFile.exists()){      destFile.createNewFile();    }    // 务必开启写模式    RandomAccessFile accessFile = new RandomAccessFile( destFile, "rw" );    FileChannel destChannel = accessFile.getChannel();    int position = 0;    long count = srcChannel.size();    destChannel.transferFrom( srcChannel, position, count );    srcChannel.close();    destChannel.close();  }}

使用transferFrom方法可以拷贝文件内容。mark！