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java網(wǎng)頁瀏覽器設(shè)計-課程設(shè)計
java網(wǎng)頁瀏覽器設(shè)計
/*
**網(wǎng)頁瀏覽器主程序
**WebBrowser.java
*/
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.filechooser.FileFilter;
import jav
2、ax.swing.filechooser.FileView;
import java.io.*;
import .*;
import java.util.*;
public class WebBrowser extends JFrame implements HyperlinkListener,ActionListener{
??? //建立工具欄用來顯示地址欄
??? JToolBar bar=new JToolBar ();
???
??? //建立網(wǎng)頁顯示界面
??? JTextField jurl = new JTextField (60);
3、
??? JEditorPane jEditorPane1 = new JEditorPane ();
??? JScrollPane scrollPane = new JScrollPane (jEditorPane1);
???
??? JFileChooser chooser=new JFileChooser ();
??? JFileChooser chooser1=new JFileChooser ();
??? String htmlSource;
??? JWindow window = new JWindow (WebBrowser.this);
??
4、?
??? JButton button2=new JButton ("窗口還原");
??? Toolkit toolkit = Toolkit.getDefaultToolkit();
???
??? //建立菜單欄
??? JMenuBar jMenuBar1 = new JMenuBar();
??? //建立菜單組
??? JMenu fileMenu = new JMenu ("文件(F)");
??? //建立菜單項(xiàng)
??? JMenuItem saveAsItem = new JMenuItem ("另存為(A)...");
??? JMenuIte
5、m exitItem=new JMenuItem ("退出(I)");
???
??? JMenu editMenu=new JMenu ("編輯(E)");
??? JMenuItem backItem=new JMenuItem ("后退");
??? JMenuItem forwardItem=new JMenuItem ("前進(jìn)");
???
??? JMenu viewMenu=new JMenu ("視圖(V)");
??? JMenuItem fullscreenItem=new JMenuItem ("全屏(U)");
??? JMenuItem sour
6、ceItem=new JMenuItem ("查看源碼(C)");
??? JMenuItem reloadItem=new JMenuItem ("刷新(R)");
??? //建立工具欄
??? JToolBar toolBar = new JToolBar();
??? //建立工具欄中的按鈕組件
??? JButton picSave = new JButton("另存為");
??? JButton picBack = new JButton("后退");
??? JButton picForward = new JButton("前進(jìn)");
??? JButto
7、n picView = new JButton("查看源代碼");
??? JButton picExit = new JButton("退出");
??? JLabel label=new JLabel ("地址");
??? JButton button=new JButton ("轉(zhuǎn)向");
???
??? Box adress=Box.createHorizontalBox ();???
??? //ArrayList對象，用來存放歷史地址
??? private ArrayList history=new ArrayList();
??? //整型變量，
8、表示歷史地址的訪問順序
??? private int historyIndex;
??? /**
??? **構(gòu)造函數(shù)
??? **初始化圖形用戶界面
??? */
??? public WebBrowser(){
???????
??????? setTitle ("網(wǎng)頁瀏覽器");
??????? setResizable(false);
??????? setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
???????????????????
??????? //為jEditorPane1添加事件偵聽
?
9、?????? jEditorPane1.addHyperlinkListener (this);
???????
??????? //為組件fileMenu設(shè)置熱鍵‘F’
??????? fileMenu.setMnemonic('F');
???????
??????? saveAsItem.setMnemonic ('S');
??????? //為“另存為”組件設(shè)置快捷鍵為ctrl+s
??????? saveAsItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_S,InputEvent.CTRL_MA
10、SK));
???????
??????? exitItem.setMnemonic('Q');
??????? exitItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_E,InputEvent.CTRL_MASK));
???????
??????? //將菜單項(xiàng)saveAsItem加入到菜單組fileMenu中
??????? fileMenu.add (saveAsItem);
??????? //在菜單項(xiàng)中添加隔離
??????? fileMenu.addSeparator ();
???
11、???? fileMenu.add (exitItem);
???????
??????? backItem.setMnemonic ('B');
??????? backItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_Z,InputEvent.CTRL_MASK));
??????? forwardItem.setMnemonic('D');
??????? forwardItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_P,InputEvent
12、.CTRL_MASK));
???????
??????? editMenu.setMnemonic('E');
??????? editMenu.add (backItem);
??????? editMenu.add (forwardItem);?
???????
??????? viewMenu.setMnemonic('V');
???????
??????? fullscreenItem.setMnemonic('U');
??????? fullscreenItem.setAccelerator (KeyStroke.getKeyStroke (Ke
13、yEvent.VK_U,InputEvent.CTRL_MASK));
??????? sourceItem.setMnemonic('C');
??????? sourceItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_C,InputEvent.CTRL_MASK));
??????? reloadItem.setMnemonic('R');
??????? reloadItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_R,InputEvent.CTR
14、L_MASK));
???????
??????? Container contentPane=getContentPane ();
???????????
??????? //設(shè)置大小
??????? scrollPane.setPreferredSize(new Dimension(100,500));
??????? contentPane.add (scrollPane, BorderLayout.SOUTH);
???????
??????? //在工具欄中添加按鈕組件
??????? toolBar.add(picSave);
??????? tool
15、Bar.addSeparator();
??????? toolBar.add(picBack);
??????? toolBar.add(picForward);
??????? toolBar.addSeparator();
??????? toolBar.add(picView);
??????? toolBar.addSeparator();
??????? toolBar.add(picExit);
???????
??????? contentPane.add (bar,BorderLayout.CENTER);
??????? contentPane.add
16、(toolBar,BorderLayout.NORTH);
???????
??????? viewMenu.add (fullscreenItem);
??????? viewMenu.add (sourceItem);
??????? viewMenu.addSeparator ();
??????? viewMenu.add (reloadItem);
???????
??????? jMenuBar1.add (fileMenu);
??????? jMenuBar1.add (editMenu);
??????? jMenuBar1.add (vie
17、wMenu);
??????? setJMenuBar (jMenuBar1);
???
??????? adress.add (label);
??????? adress.add (jurl);
??????? adress.add (button);
??????? bar.add (adress);
???????
??????? //為組件添加事件監(jiān)X聽
??????? saveAsItem.addActionListener(this);
??????? picSave.addActionListener(this);
??????? ex
18、itItem.addActionListener(this);
??????? picExit.addActionListener(this);
??????? backItem.addActionListener(this);
??????? picBack.addActionListener(this);
??????? forwardItem.addActionListener(this);
??????? picForward.addActionListener(this);
??????? fullscreenItem.addActionListener(this);
19、??????? sourceItem.addActionListener(this);
??????? picView.addActionListener(this);
??????? reloadItem.addActionListener(this);
??????? button.addActionListener(this);
??????? jurl.addActionListener(this);
??? }
???
??? /**
??? **實(shí)現(xiàn)監(jiān)X聽*X器接口的actionPerformed函數(shù)
??? */
??? public void action
20、Performed(ActionEvent e) {
??????? String url = "";
??????? //點(diǎn)擊轉(zhuǎn)向按鈕
??????? if (e.getSource() == button){
??????????? //獲得地址欄的內(nèi)容
??????????? url=jurl.getText ();
??????????? //url不為“”，并且以“http://”開頭
??????????? if(url.length ()>0&&url.startsWith ("http://")){
??????????????? try {
?????
21、?????????????? //JEditorPane組件顯示url的內(nèi)容鏈接
??????????????????? jEditorPane1.setPage (url);
??????????????????? //將url的內(nèi)容添加到ArrayList對象history中
??????????????????? history.add(url);
??????????????????? //historyIndex的數(shù)值設(shè)為history對象的長度-1
??????????????????? historyIndex=history.size()-1;
????????
22、??????????? //重新布局
????? jEditorPane1.setEditable(false); //add by copy editor :)
??????????????????? jEditorPane1.revalidate ();
??????????????? }
??????????????? catch(Exception ex) {
??????????????????? //如果鏈接顯示失敗，則彈出選擇對話框“無法打開該搜索頁”
??????????????????? JOptionPane.showMessageDialog (WebB
23、rowser.this,"無法打開該搜索頁","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????????? }
??????????? }
??????????? //url不為“”，并且不以“http://”開頭
??????????? else if(url.length ()>0&&!url.startsWith ("http://")) {
??????????????? //在url前面添加“http://”
??????????????? url="http://"+url;
??????????????? try {
24、
??????????????????? jEditorPane1.setPage (url );
??????????????????? history.add(url);
??????????????????? historyIndex=history.size()-1;
????? jEditorPane1.setEditable(false); //add by copy editor :)
??????????????????? jEditorPane1.revalidate ();
??????????????? }
??????????????? catc
25、h(Exception ex) {
??????????????????? JOptionPane.showMessageDialog (WebBrowser.this,"無法打開該搜索頁","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????????? }
??????????? }
??????????? //沒有輸入url，即url為空
??????????? else if(url.length ()==0){
??????????????? JOptionPane.showMessageDialog (WebBrowser.thi
26、s,"請輸入鏈接地址","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????? }
???????
??????? }
??????? //輸入地址后點(diǎn)擊回車
??????? else if (e.getSource() == jurl){
??????????? url=jurl.getText ();
??????????? if(url.length ()>0&&url.startsWith ("http://")) {
??????????????? try {
??????????????????? jEditorPa
27、ne1.setPage (url);
??????????????????? history.add(url);
??????????????????? historyIndex=history.size()-1;
????? jEditorPane1.setEditable(false); //add by copy editor :)
??????????????????? jEditorPane1.revalidate ();
??????????????????? jurl.setMaximumSize (jurl.getPreferredSize ());
???
28、???????????? }
??????????????? catch(Exception ex) {
??????????????????? JOptionPane.showMessageDialog (WebBrowser.this,"無法打開該搜索頁","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????????? }
??????????? }
??????????? else if(url.length ()>0&&!url.startsWith ("http://")) {
??????????????? url="h
29、ttp://"+url;
??????????????? try {
??????????????????? jEditorPane1.setPage (url );
??????????????????? history.add(url);
??????????????????? historyIndex=history.size()-1;
????? jEditorPane1.setEditable(false); //add by copy editor :)
??????????????????? jEditorPane1.revalidate ();
?????
30、?????????? }
??????????????? catch(Exception ex) {
??????????????????? JOptionPane.showMessageDialog (WebBrowser.this,"無法打開該搜索頁","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????????? }
??????????? }
??????????? else if(url.length ()==0){
??????????????? JOptionPane.showMessageDialog (WebBrows
31、er.this,"請輸入鏈接地址","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????? }
??????? }
??????? //另存為...
??????? else if (e.getSource() == picSave||e.getSource() == saveAsItem){
??????????? url = jurl.getText ().toString ().trim();
??????????? if(url.length ()>0&&!url.startsWith ("http://")) {
??????
32、????????? url=""+url;
??????????? }
??????????? if(!url.equals ("")) {
??????????????? //保存文件
??????????????? saveFile(url);
??????????? }
??????????? else {
??????????????? JOptionPane.showMessageDialog (WebBrowser.this,"請輸入鏈接地址","網(wǎng)頁瀏覽器",JOptionPane.ERROR_MESSAGE);
??????????? }
??????? }
??????? //退出
??????? else if (e.getSource() == exitItem ||e.getSource() == picExit){
??????????? System.exit(0);
??????? }140
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java網(wǎng)頁瀏覽器設(shè)計課程設(shè)計
