java nio實現文件復制

public class TransferTo {
    public static void main(String[] args) throws Exception {
        FileChannel in = new FileInputStream("src/demo20/data.txt").getChannel(),
                out = new FileOutputStream("src/demo20/data2.txt").getChannel();
        in.transferTo(0, in.size(), out);
        
    }

}

通過nio來實現,transferTo方法即可實現.真的簡單,不用寫循環什么的,具體方法參考文檔.