java中的FileWriter没有写入txt文件 [英] FileWriter in java not writing to txt file

问题描述

我正在尝试从 JOptionPane 获取输入，并使用 FileWriter class。为了确保输入用户键入的内容，我写了一个system.out，然后出现了我在JOptionPane中输入的内容。不幸的是，当我打开.txt文件时，我输入的内容就出现了！顺便说一句，我输入的文件路径是正确的。

I am trying to get input from a JOptionPane and store what the user typed into a text file using the FileWriter class.To make sure that the input from what the user typed was being stored I wrote a system.out and what I typed in the JOptionPane appears. Unfortunately when I open the .txt file nothing I entered appears! By the way, the file path I entered is correct.

这是我的代码。帮助我！

Here is my code. HELP ME!

String playername = JOptionPane.showInputDialog("What Will Be Your Character's Name?");
System.out.println(playername);
try {
    FileWriter charectersname = new FileWriter("/Users/AlecStanton/Desktop/name.txt/");
    BufferedWriter out = new BufferedWriter(charectersname);
    out.write(playername);
    }
catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
}

推荐答案

缓冲编写者只会写出来当它们已满或当它们被关闭时（因此名称​​缓冲）。

Buffered writers will only write out when they're full or when they're being closed (hence the name Buffered).

所以你可以这样做：

out.close();

将刷新缓冲区然后关闭它。如果您只想刷新它但是保持打开以进行进一步的写入（例如，假设您正在编写日志文件），您可以这样做：

which will flush the buffer and then close it. If you only wanted to flush it but keep it open for further writes (e.g. imagine you're writing a log file), you could do:

out.flush();

在完成此类资源时，您可能希望这样做。例如

You'd likely want to do this when finishing up with such a resource. e.g.

BufferedWriter out = ...
try {
   out.write(...);
}
catch (Exception e) {
   // ..
}
finally {
   out.close();
}

或者可能使用 try-with-resources 构造，（坦率地说）编写代码更加可靠。

Or possibly using the try-with-resources constructs in Java 7, which (frankly) is more reliable to write code around.

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