附加到utf8中的文件 [英] Appending to file in utf8

问题描述

对于项目，我需要使用UTF-8编码附加到文本文件中。
在研究过程中，我发现了两种可能性：

For a project I need to append to a textfile using UTF-8 encoding. During my research I found two possibilities:

BufferedWriter out = new BufferedWriter(
    new OutputStreamWriter(new FileOutputStream("file.txt), "UTF-8")
)

用UTF-8写入我的文件，但是它将覆盖它，而不是在文件已经存在的情况下追加到文件中。

This will write to my file in UTF-8, but it will overwrite it, rather than append to it if it already exist.

然后我找到了附加到现有代码的代码 FileWriter 中带有参数的文件，但这不会显式使用UTF-8，而是使用默认系统字符集：

Then I found the code to apend to an existing file with a parameter in the FileWriter, but this will not use UTF-8 explicitely, rather than use the default system character set:

BufferedWriter out = new BufferedWriter(new FileWriter("myfile.txt", true))

我现在需要同时定义编码和附加到文件的可能性。仅依靠系统编码或更改它不是一种选择。

I now need the possibility to define BOTH the encoding as well as appending to a file. Just rely on the system encoding or change this is not an option.

有什么想法吗？

推荐答案

您忘记添加 true 指向 FileOutputStream 构造函数：

You forgot to add the true paramter to the FileOutputStream constructor:

BufferedWriter out = new BufferedWriter(
    new OutputStreamWriter(
        new FileOutputStream("file.txt", true), // true to append
        StandardCharsets.UTF_8                  // Set encoding
    )
);

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