读写文件操作的问题，希望各位能帮我看一下

Question

FileOutputStream的方法read(byte[])返回int型的值，该值就是实际读出的字节数。

Answer 1

一行一行读试试吧!用LineNumberReader

Answer 2

http://www.csdn.net/expert/topic/879/879036.xml?temp=.8178827

Answer 3

public void copyFile(String sourcename, String targetname) throws Exception 
   {
      // Open up a reader from sourcename and a writer to targetname.
      // Write each character from sourcename to targetname, then close.
      BufferedReader breader;//reader from source
      BufferedWriter bwriter;//writer to target
      try 
      {
         breader = new BufferedReader(new FileReader(sourcename));
         bwriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(targetname)));
         while(breader.ready()) 
            bwriter.write(breader.read());
         breader.close();
         bwriter.close();
      }//try
      catch(Exception e) 
      {
         throw e;
      }//catch
   }//copyFile