如何在java中保存文件 [英] How to save a file in java

问题描述

我正在尝试从日志报告中创建一个文件。为了保存，我创建了一个按钮。按下按钮时，将执行以下代码。

I am trying to create a file from a log report. To save I have created a button. When the button is pushed, the following code is executed.

public void SAVE_REPORT(KmaxWidget widget){//save
  try {
    String content = report.getProperty("TEXT");
    File file = new File("logKMAX.txt");
    // if file doesnt exists, then create it
    if (!file.exists()) {
      file.createNewFile();
    }

    FileWriter fw = new FileWriter(file.getAbsoluteFile());
    BufferedWriter bw = new BufferedWriter(fw);
    bw.write(content);
    bw.close();
  } catch (IOException e) {
    e.printStackTrace();
  }
} //SAVE_REPORT

我没有编译错误，但又一次目录中没有文件保存，我有上述代码。

I have no compile errors, but again there is no file save in the directory that I have the aforementioned code.

有什么可能出错的想法吗？

Any idea on what might be wrong?

推荐答案

使用新文件API。首先，在你的程序中，你不验证 .createNewFile（）的返回值：它在失败时不会抛出异常......

Use the new file API. For one, in your program, you don't verify the return value of .createNewFile(): it doesn't throw an exception on failure...

使用新的文件API，它更简单：

With the new file API, it is MUCH more simple:

public void saveReport(KmaxWidget widget)
    throws IOException
{
    final String content = report.getProperty("TEXT");
    final Path path = Paths.get("logKMAX.txt");

    try (
        final BufferedWriter writer = Files.newBufferedWriter(path,
            StandardCharsets.UTF_8, StandardOpenOption.CREATE);
    ) {
        writer.write(content);
        writer.flush();
    }
}

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