在Java中文件中间写字节的最佳方式 [英] Best Way to Write Bytes in the Middle of a File in Java

问题描述

解决方案

在文本中使用Java编写字节的最佳方式是什么？文件中间与使用 <$ c一样简单$ c> RandomAccessFile 。

RandomAccessFile 尽管它的名字，更像是一个 InputStream 和 OutputStream 而不像文件。它允许您通过文件中的字节读取或查找，然后开始写入您要停止的任何字节。

一旦你发现这个课程，如果你对普通档案i / o有一个基本的了解，那就很容易使用。

一个小例子：

  public static void aMethod（）{
 RandomAccessFile f = new RandomAccessFile（new File（whereDidIPutTHatFile），rw） ; 
 long aPositionWhereIWantToGo = 99; 
 f.seek（aPositionWhereIWantToGo）; //这基本上读取文件中的n个字节
 f.write（Im in teh fil，writn bites.getBytes（））; 
 f.close（）; 
} 
  

What is the best way to write bytes in the middle of a file using Java?

解决方案

Reading and Writing in the middle of a file is as simple as using a RandomAccessFile in Java.

RandomAccessFile, despite its name, is more like an InputStream and OutputStream and less like a File. It allows you to read or seek through bytes in a file and then begin writing over whichever bytes you care to stop at.

Once you discover this class, it is very easy to use if you have a basic understanding of regular file i/o.

A small example:

public static void aMethod(){
    RandomAccessFile f = new RandomAccessFile(new File("whereDidIPutTHatFile"), "rw");
    long aPositionWhereIWantToGo = 99;
    f.seek(aPositionWhereIWantToGo); // this basically reads n bytes in the file
    f.write("Im in teh fil, writn bites".getBytes());
    f.close();
}

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