文件写入器覆盖文件而不是附加到文件的麻烦 [英] Trouble with filewriter overwriting files instead of appending to the end

问题描述

好的，我在将多行写入文本文件时遇到了一些麻烦。

OK, I'm having some trouble writing multiple lines to a text file.

程序运行，但每次都不会使用新行

the program runs, but it won't use new lines each time

当我希望它运行4次时，文本文件应如下所示：

when I want it run 4 times, the text file should look like:

a
b
c
d

相反，它看起来像：

d

谁知道如何解决这个问题？所有导入都已正确导入。

who knows how to fix this problem? all imports are correctly imported.

source（它已被略微编辑，假设所有内容都已正确定义）：

source(it's been slightly edited, assume everything is properly defined):

import java.io.*;
public class Compiler {
public static void main (String args[]) throws IOException
{
    //there's lots of code here
    BufferedWriter outStream= new BufferedWriter(new FileWriter("output.txt"));
    outStream.newLine();
    outStream.write(output);
    outStream.close();
}

}

推荐答案

确保在创建 FileWriter 的实例时，您要附加到它的末尾。这可以通过使用这个特定的 FileWriter 构造函数，它将另外的 boolean 作为第二个参数。这个 boolean 告诉 FileWriter 附加到文件的末尾，而不是覆盖文件。

Make sure that when you create an instance of a FileWriter, that you are appending to the end of it. This can be done by using this specific FileWriter constructor which takes an additional boolean as a second parameter. This boolean tells the FileWriter to append to the end of the file, rather than overwriting the file.

BufferedWriter outStream= new BufferedWriter(new FileWriter("encoded.txt", true));

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