Question

我在JTextPanel中显示RSS提要。显示的结果不会转到新行。如何在JTextPane中插入\ n？谢谢！

writeNews类：

 public String writeNews() 
        {
            String result = "";

            try 
        {               
            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            URL u = new URL("http://thestar.com.my.feedsportal.com/c/33048/f/534600/index.rss"); 

            Document doc = builder.parse(u.openStream());
            NodeList nodes = doc.getElementsByTagName("item");

            for(int i=0;i<nodes.getLength();i++) 
            {                
                Element element = (Element)nodes.item(i);           

                result += "\nTitle: " + getElementValue(element,"title");               
                result += "\nLink: " + getElementValue(element,"link");
                result += "\nPublish Date: " + getElementValue(element,"pubDate");
                result += "\nDescription: " + getElementValue(element,"description");

                System.out.println("Title: " + getElementValue(element,"title"));
                System.out.println("Link: " + getElementValue(element,"link"));
                System.out.println("Publish Date: " + getElementValue(element,"pubDate"));
                System.out.println("Description: " + getElementValue(element,"description"));
                System.out.println();

            }
        }

        catch(Exception ex) 
        {
            ex.printStackTrace();
        }

        return result;
    }

结果显示在一个简单的JTextPane上：

public void news()
    {
        news = new JPanel(new GridLayout());
        news.setBackground(SystemColor.inactiveCaptionBorder);

        JTextPane newsTextPane = new JTextPane(); 
        newsTextPane.setContentType("text/html");
        newsTextPane.setEditable(false); 

        JScrollPane scrollPane = new JScrollPane(newsTextPane);     
        news.add(scrollPane);   

        TextSamplerDemo reader = TextSamplerDemo.getInstance();
        reader.writeNews();             

        String rssNews = reader.writeNews();
        newsTextPane.setText(rssNews);

    }

JTextPane查看： JTextPane View

控制台视图： Console View

Answer 1

这是一种可行的解决方法，

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;

public class TestLineBreak {

    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 10; i++) {
            sb.append("Text goes here <br>"); //<br> tag to insert line breaks
        }
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JTextPane newsTextPane = new JTextPane();
        newsTextPane.setContentType("text/html");
        newsTextPane.setEditable(false);
        newsTextPane.setText(sb.toString());

        JScrollPane scrollPane = new JScrollPane(newsTextPane);
        frame.add(scrollPane);
        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}

Answer 2

result += "Title: " + getElementValue(element,"title");             
result += "Link: " + getElementValue(element,"link");
result += "Publish Date: " + getElementValue(element,"pubDate");
result += "Description: " + getElementValue(element,"description");

创建String时，永远不会使用新行。将换行符添加到每行的开头（第一行除外）或将换行符附加到每行的末尾（除最后一行之外）。

Answer 3

箱.. 以上2个答案的工作方式在逻辑上是正确的，但我们应该从java提供的内置类和功能中获得帮助。

如果您要添加与

上的问题类似的其他功能，您也可以采用以下方式

请参阅http://docs.oracle.com/javase/7/docs/api/javax/swing/text/DefaultEditorKit.html

JTextPane不会换新线？

3 个答案: