Java Swing 将文件读取到文本字段

Question

我正在尝试使用 Java 读取 txt 文件。我想将内容分开。

txt文件的内容示例为:

[t]
Harry Potter
[a]
J.K Rowling

[c]
Once Upon a time
there was a wizard name Harry Potter
The End.

我想将带有 [c] 的文本放入名为 txtContent 的文本字段中，但现在发生的情况是只有第一行在 txtContent 中传递

private void btnRetireveActionPerformed(java.awt.event.ActionEvent evt) {                                            
    String filename=txtFilename.getText()+".txt";
    int x=1;
    String text=null;
    try (BufferedReader fw = new BufferedReader(new FileReader(new File(filename))))
    {
        String s;
        while((s = fw.readLine()) != null)
        {
            if(s.equals("[a]"))
            {
                String author = fw.readLine(); //read the next line after [a]
                txtAuthor.setText(author);
                break;
            }
        }
        while((s = fw.readLine()) != null)
        {
            if(s.equals("[c]"))
            {
                String content = fw.readLine(); //read the next line after [a]
                txtContent.setText(content);
                break;
            }
        }

    } catch (IOException exp)
    {
        exp.printStackTrace();
    }
}

Answer 1

当您检测到当前是否位于 [a] 行时，您可以读取 nextLine 并中断循环。

使用BufferedReader而不是FileReader

示例:

try (BufferedReader fw = new BufferedReader(new FileReader(new File("text.txt"))))
{
    String s;
    while((s = fw.readLine()) != null)
    {
        if(s.equals("[a]"))
        {
            String author = fw.readLine(); //read the next line after [a]
            System.out.println(author); //the line after [a]
        }
        if(s.equals("[c]"))
        {
            StringBuilder content = new StringBuilder();
            while((s = fw.readLine()) != null)
                content.append(s + " ");
            System.out.println(content); //the line after [c]
        }
    }
} catch (IOException exp)
{
    exp.printStackTrace();
}