辛辛苦苦写的课程设计不能用。进来吧！（大虾们，虾之大者，为国为民啊）

Question

/*显示源代码框架*/import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.filechooser.FileView;
import javax.swing.filechooser.FileFilter;
import java.io.*;
import java.util.*;public class ViewSourceFrame extends JFrame implements ActionListener{

JPanel contentPane;
JPanel panel1=new JPanel();
JPanel panel2=new JPanel();
Border border1;
    

JButton closebutton=new JButton();
JButton savebutton=new JButton();
JScrollPane jScrollpanel=new JScrollPane();
JTextArea jTextAreal=new JTextArea();

String htmlSource;

/*构造函数，初始化图形界面*/
public ViewSourceFrame(String htmlSource){

this.htmlSource=htmlSource;
enableEvents(AWTEvent.WINDOW_FOCUS_EVENT_MASK);
setSize(new Dimension(600,500));
setTitle("源代码");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

contentPane=(JPanel)getContentPane();
contentPane.setLayout(new BorderLayout());

panel2.setLayout(new FlowLayout());

savebutton.setText("保存");
closebutton.setText("退出");

savebutton.addActionListener(this);
closebutton.addActionListener(this);

jScrollpanel.getViewport().add(jTextAreal,null);
border1=BorderFactory.createEmptyBorder(4,4,4,4);
panel1.setLayout(new BorderLayout());
panel1.setBorder(border1);
panel1.add(jScrollpanel,BorderLayout.CENTER);
contentPane.add(panel1,BorderLayout.CENTER);

panel2.add(savebutton);
panel2.add(closebutton);

contentPane.add(panel2,BorderLayout.SOUTH);
this.jTextAreal.setEditable(true);
this.jTextAreal.setText(this.htmlSource);
//设置光标的位置，将其移动到文本区第0个位置
this.jTextAreal.setCaretPosition(0);
}

//实现监听器接口的actionPerformed函数
public void actionPerformed(ActionEvent e){
String url="";
if(e.getSource()==closebutton){
dispose();
}
else if(e.getSource()==savebutton){
JFileChooser fc=new JFileChooser();
int returnVal=fc.showSaveDialog(ViewSourceFrame.this);
File saveFile=fc.getSelectedFile();
try{
FileWriter writeOut=new FileWriter(saveFile);
writeOut.write(jTextAreal.getText());
writeOut.close();
}catch(Exception ex){
PrintWriter pw=new PrintWriter(System.out,true);
pw.println("保存失败");
}
}
}

}

Answer 1

//接上  
//保存文件的函数 
    void saveFile(final String url){ 
     final String linesep=System.getProperty("line.separator"); 
     chooser1.setCurrentDirectory(new File(".")); 
     chooser1.setDialogType(JFileChooser.APPROVE_OPTION); 
     chooser1.setDialogTitle("另存为"); 
     if(chooser1.showSaveDialog(this)!=JFileChooser.APPROVE_OPTION) 
     return; 
     this.repaint(); 
     Thread thread=new Thread(){ 
     public void run(){ 
     try{ 
     java.net.URL source=new URL(url); 
     InputStream in=new 
     BufferedInputStream(source.openStream()); 
     BufferedReader br=new BufferedReader(new InputStreamReader(in)); 
     File fileName=chooser1.getSelectedFile(); 
     FileWriter out=new FileWriter(fileName); 
     BufferedWriter bw=new BufferedWriter(out); 
     String line; 
     while((line=br.readLine())!=null){ 
     bw.write(line); 
     bw.newLine(); 
     } 
     bw.flush(); 
     bw.close(); 
     out.close(); 
     String dMessage=url+"已经被保存至"+linesep 
     +fileName.getAbsolutePath(); 
     String dTitle="另存为"; 
     int dType=JOptionPane.INFORMATION_MESSAGE; 
     JOptionPane.showMessageDialog((Component)null,dMessage,dTitle,dType); 
     }catch(java.net.MalformedURLException muex){ 
     JOptionPane.showMessageDialog((Component)null,muex.toString(),"网页浏览器", 
     JOptionPane.ERROR_MESSAGE); 
     } 
     catch(Exception ex){ 
     JOptionPane.showMessageDialog((Component)null, 
     ex.toString(),"网页浏览器",JOptionPane.ERROR_MESSAGE); 
     } 
     } 
     }; 
     thread.start(); 
} 
     
    
    //获得源代码的函数 
    void getHtmlSource(String url){ 
     String linesep,htmlLine; 
     linesep=System.getProperty("line.separator"); 
     htmlSource=""; 
     try{ 
     java.net.URL source=new URL(url); 
     InputStream in=new BufferedInputStream(source.openStream()); 
     BufferedReader br=new BufferedReader(new 
     InputStreamReader(in)); 
     while((htmlLine=br.readLine())!=null){ 
     htmlSource=htmlSource+htmlLine+linesep; 
     } 
     
     } 
     catch(java.net.MalformedURLException muex){ 
     JOptionPane.showMessageDialog(WebBrowser.this, muex.toString(),"网页浏览器" 
     ,JOptionPane.ERROR_MESSAGE); 
     } 
     catch(Exception e){ 
     JOptionPane.showMessageDialog(WebBrowser.this, e.toString(),"网页浏览器", 
     JOptionPane.ERROR_MESSAGE); 
     } 
     
    } 
     
     
    //实现监听器接口的hyperlinkUpdate函数 
    public void hyperlinkUpdate(HyperlinkEvent e){ 
     try{ 
     if(e.getEventType()==HyperlinkEvent.EventType.ACTIVATED) 
     jEditorPanel.setPage(e.getURL()); 
     }catch(Exception ex){ 
     ex.printStackTrace(System.err); 
     } 
     } 
     
     
     
    //主函数生成一个IE对象 
    public static void main(String[] args){ 
     try{ 
     UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); 
     }catch(Exception e){} 
     WebBrowser webBrowser=new WebBrowser(); 
     webBrowser.pack(); 
     webBrowser.setResizable(true); 
     webBrowser.setVisible(true); 
    } 
}