webbrowser.java

简易WEB浏览器,用JAVA语言编写的一个浏览器,你可以根据自己的需要对他进行修改.

							try{
								jEditorPane1.setPage(URL);
								history.add(URL);
								historyIndex=history.size()-1;
								//设置成非编辑状态jEditorPane1.setEditable(false);
								jEditorPane1.revalidate();
								}
								catch(Exception ex){
									JOptionPane.showMessageDialog(WebBrowser.this,"无法打开该搜索页","闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
									}
							}
							else if(URL.length()==0){
								JOptionPane.showMessageDialog(WebBrowser.this,"请输入链接地址","闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
								}
					}
					//另存为...
					else if(e.getSource()==picSave||e.getSource()==saveAsItem){
						URL=jurl.getText().toString().trim();
						if(URL.length()>0&&!URL.startsWith("http://")){
							URL="http://"+URL;
							}
							if(!URL.equals("")){
								//保存文件
								saveFile(URL);
								}
								else{
									JOptionPane.showMessageDialog(WebBrowser.this,"请输入链接地址","闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
									}
						}
						//退出
						else if(e.getSource()==exitItem||e.getSource()==picExit){
							System.exit(0);
							}
							//后退
							else if(e.getSource()==backItem||e.getSource()==picBack){
								historyIndex--;
								if(historyIndex<0)
								historyIndex=0;
								URL=jurl.getText();
								try{
									//获得history对象中本地址之前访问的地址
									URL=(String)history.get(historyIndex);
									jEditorPane1.setPage(URL);
									jurl.setText(URL.toString());
									//设置成非编辑状态jEditorPane1.setEditable(false);
									jEditorPane1.revalidate();
									}
									catch(Exception ex){
										}
								}
								//前进
								else if(e.getSource()==forwardItem||e.getSource()==picForward){
									historyIndex++;
									if(historyIndex>=history.size())
									   historyIndex=history.size()-1;
									   URL=jurl.getText();
									  try{
									  	//获得对象中本地址之后访问的地址
									  	URL=(String)history.get(historyIndex);
									  	jEditorPane1.setPage(URL);
									  	jurl.setText(URL.toString());
									  	//设置成非编辑状态jEditorPane1.setEditable(false);
									  	jEditorPane1.revalidate();
									  	}
									  	catch(Exception ex){
									  		}
									}
									//全屏
								 else if(e.getSource()==fullscreenItem){
								 	boolean add_button2=true;
								 	
								 	//获得屏幕大小
								 	Dimension size=Toolkit.getDefaultToolkit().getScreenSize();
								 	
								 	Container content=Window.getContentPane();
								 	content.add(bar,"North");
								 	content.add(ScrollPane,"Center");
								 	
								 	//button2为单击"全屏"后的还原按钮
								 	if(add_button2==true){
								 		bar.add(button2);
								 		}
								 		//为button2添加事件
								 		button2.addActionListener(new ActionListener(){
								 			public void actionPerformed(ActionEvent evt){
								 				WebBrowser.this.setEnabled(true);
								 				Window.remove(bar);
								 				Window.remove(toolBar);
								 				Window.remove(ScrollPane);
								 				Window.setVisible(false);
								 				
								 			  ScrollPane.setPreferredSize(new Dimension(100,500));
								 				getContentPane().add(ScrollPane,BorderLayout.SOUTH);
								 				getContentPane().add(bar,BorderLayout.CENTER);
								 				getContentPane().add(toolBar,BorderLayout.NORTH);
								 				bar.remove(button2);
								 				pack();
								 				}
								 			});
								 			Window.setSize(size);
								 			Window.setVisible(true);
								 	}
								 	//查看源文件
								 	else if(e.getSource()==sourceItem||e.getSource()==picView){
								 		URL=jurl.getText().toString().trim();
								 		if(URL.length()>0&&!URL.startsWith("http://")){
								 			URL="http://"+URL;
								 			}
								 			if(!URL.equals("")){
								 				//根据url,获得源代码
								 				getHtmlSource(URL);
								 				//生成显示源代码的框对象
								 				ViewSourceFrame vsframe=new ViewSourceFrame(htmlSource);
								 				vsframe.setBounds(0,0,800,500);
								 				vsframe.setVisible(true);
								 				}
								 				else{
								 					JOptionPane.showMessageDialog(WebBrowser.this,"请输入链接地址","闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
								 					}
								 		}
								 		//刷新
								 		else if(e.getSource()==reloadItem){
								 			URL=jurl.getText();
								 			if(URL.length()>0&&URL.startsWith("http://")){
								 				try{
								 					jEditorPane1.setPage(URL);
								 					//设置成非编辑状态jEditorPane1.setEditable(false);
								 					jEditorPane1.revalidate();
								 					}
								 					catch(Exception ex){
								 						}
								 				}
								 				else if(URL.length()>0&&!URL.startsWith("http://")){
								 					URL="http://"+URL;
								 					try{
								 						jEditorPane1.setPage(URL);
								 						//设置成非编辑状态jEditorPane1.setEditable(false);
								 						jEditorPane1.revalidate();
								 						}
								 						catch(Exception ex){
								 							}
								 					}
								 			}
			            }
			            /*
			            **保存文件
			            */
			            void saveFile(final String URL){
			            	final String linesep=System.getProperty("line.separator");
			            	chooser1.setCurrentDirectory(new File("."));
			            	chooser1.setDialogType(JFileChooser.SAVE_DIALOG);
			            	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(),"闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
			            					}
			            				catch(Exception ex){
			            					JOptionPane.showMessageDialog((Component)null,ex.toString(),"闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
			            					}
			            			}
			            		};
			            		Thread.start();
			            	}
			            	/*
			            	**获得源代码
			            	*/
			            	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(),"闫培峰的NetLook      QQ:472556417",JOptionPane.ERROR_MESSAGE);
			            				}
			            			catch(Exception e){
			            				JOptionPane.showMessageDialog(WebBrowser.this,e.toString(),"闫培峰的NetLook      QQ:472556417",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)
			            				 jEditorPane1.setPage(e.getURL());
			            				}
			            				catch (Exception ex){
			            					ex.printStackTrace(System.err);
			            					}
			            			}
			            			/*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.setVisible(true);
			        		}
}