在D盘创建文件test.txt，文件内容为“hello Java”，然后利用流把该文件拷贝到E盘目录下。

[yinhr]

import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; public class test{ public static void main(String[] args) throws IOException{ File f = new File("d:\\test.txt"); File f1 = new File("e:\\test.txt"); FileReader reader = new FileReader(f); FileWriter writer = new FileWriter(f1); char[] buff = new char[512]; int len =0; while((len=reader.read(buff))!=-1){ String str = new String(buff,0,len); writer.write(str); writer.flush(); } reader.close(); writer.close(); } }

[牛肉滚蛋花]

分不要就给我吧

[yinhr]

引用 1 楼 牛肉滚蛋花的回复:

分不要就给我吧

我在aap上不会发博客，枯了

[牛肉滚蛋花]

引用 2 楼 夜雨奏长歌° 的回复:

[quote=引用 1 楼 牛肉滚蛋花的回复:]分不要就给我吧

我在aap上不会发博客，枯了[/quote]

[huhk]

还是用finally 关闭stream 吧，稳健些

[netwar]

 public static void main(String[] args) throws Exception {
    String path = "/Users/Desktop/aa";
    File file1 = new File(path, "1.pdf");
    File file2 = new File(path, "2.pdf");
    if (!file1.exists()) {
      System.out.println("文件" + file1 + "不存在");
      return;
    }
    if (file2.exists()) {
      System.out.println("文件已存在，执行删除操作");
      file2.delete();
    }
    System.out.println("开始复制" + file2);
    try (InputStream in = new BufferedInputStream(new FileInputStream(file1));
        OutputStream out = new BufferedOutputStream(new FileOutputStream(file2))) {
      int c = 0;
      int total = 0;
      while (c != -1) {
        c = in.read();
        total += c;
        out.write((char) c);

      }
      System.out.println("文件复制完毕共" + total + "字节");
    }
  }

[软件攻城狮_NO1]

这么写不是复制空文件吗 hello java呢