application.java

这是一个有关网上音像店的程序

       super(s);
       
   name=new JLabel("姓名：",JLabel.RIGHT);
   zip=new JLabel("邮政编码：",JLabel.RIGHT);
   address=new JLabel("通信地址：",JLabel.RIGHT);
   telephone=new JLabel("电话：",JLabel.RIGHT);
   mobile=new JLabel("手机：",JLabel.RIGHT);
   email=new JLabel("email：",JLabel.RIGHT);
   nametext=new JTextField();
   ziptext=new JTextField();
   addtext=new JTextField();
   teltext=new JTextField();
   mobtext=new JTextField();
   emailtext=new JTextField();
   
   add=new JButton("添加");
   find=new JButton("查找");
   clear=new JButton("删除");
   
   al=new ArrayList();
   Container cp=getContentPane();
   cp.setLayout(new BorderLayout());
   
   JPanel pane=new JPanel();
   pane.setLayout(new GridLayout(6,2));
   pane.add(name);
   pane.add(nametext);
   pane.add(zip);
   pane.add(ziptext);
   pane.add(address);
   pane.add(addtext);
   pane.add(telephone);
   pane.add(teltext);
   pane.add(mobile);
   pane.add(mobtext);
   pane.add(email);
   pane.add(emailtext);
   
   cp.add(pane,BorderLayout.CENTER);
   
   JPanel buttonpane=new JPanel();
   buttonpane.setLayout(new GridLayout(1,3));
   buttonpane.add(add);
   buttonpane.add(find);
   buttonpane.add(clear);
   cp.add(buttonpane,BorderLayout.SOUTH);
   
     
       add.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
       /**
          *判断条件，若姓名一栏未输入文字，则弹出提示对话框"无法添加名字为空 
          *的记录"，提示你姓名一栏不能为空
       */
             if(nametext.getText().equalsIgnoreCase("")){
                     JOptionPane.showMessageDialog(null,"无法添加名字为空的记录","Message",JOptionPane.INFORMATION_MESSAGE);
             nametext.setText("");
             ziptext.setText("");
             addtext.setText("");
             teltext.setText("");
             mobtext.setText("");
             emailtext.setText("");
             return;
           }
           Note note=new Note();
          /**通过getText()方法从文本框中获取文本*/
           note.name=nametext.getText();
           note.zip=ziptext.getText();
           note.address=addtext.getText();
           note.telephone=teltext.getText();
           note.mobile=mobtext.getText();
           note.email=emailtext.getText();
          /**对可能出现的异常进行捕获*/
           try{/**ObjectInputStream和ObjectOutputStream用于对象串行化*/
               ObjectInputStream in=new ObjectInputStream(
          /**以note.dat来构建文件输入流对象*/
               new FileInputStream("note.dat"));
               al=(ArrayList)in.readObject();
               in.close();
           }catch(Exception ex){}
          /**
             *通过note.dat来创建一个文件输出流，再增添一个布尔型变量，因为
             *为true，所以所写入的数据添加到文件后面，而不是将文件覆盖
          */
           try{
               ObjectOutputStream out=new ObjectOutputStream(
               new FileOutputStream("note.dat",true));
               Note temp=new Note();
               int i;
               for(i=0;i<al.size();i++){
                   temp=(Note)al.get(i);                    if(temp.name.equalsIgnoreCase(nametext.getText()))
               break;
            }
            if(al.size()!=0&&i!=al.size()){//ArrayList里已有记录
            JOptionPane.showMessageDialog(null,"已经存在此记录","Message",JOptionPane.INFORMATION_MESSAGE);}
            else{
              al.add(note);
              out.writeObject(al);
            }
              out.close();
              }catch(Exception ex){}
              nametext.setText("");
              ziptext.setText("");
              addtext.setText("");
              teltext.setText("");
              mobtext.setText("");
              emailtext.setText("");
            }
         });
       /**为find按钮添加ActionListener监听器，并且对可能出现的异常进行捕获*/
         find.addActionListener(new ActionListener(){
             public void actionPerformed(ActionEvent e){
             try{
                 ObjectInputStream in=new ObjectInputStream(
             new FileInputStream("note.dat"));
                 al=(ArrayList)in.readObject();
                 in.close();
             }catch(Exception ex){}
             Note temp=new Note();
             int i;
       /**如果要查找的姓名在记录中存在，则返回要查找的人的记录的全部信息*/
             for(i=0;i<al.size();i++){
                 temp=(Note)al.get(i);
                 if(temp.name.equalsIgnoreCase(nametext.getText()))
               break;
             }
          if(al.size()!=0&&i!=al.size()){
             ziptext.setText(temp.zip);
             addtext.setText(temp.address);
             teltext.setText(temp.telephone);
             mobtext.setText(temp.mobile);
             emailtext.setText(temp.email);
          }
       /**
          *如果要查找的姓名在记录中不存在，则各文本框清空，并且弹出提示对话框
          *告诉你"无此记录"
       */
             else{
             nametext.setText("");
             ziptext.setText("");
             addtext.setText("");
             teltext.setText("");
             mobtext.setText("");
             emailtext.setText("");
             JOptionPane.showMessageDialog(null,"无此记录","Message",JOptionPane.INFORMATION_MESSAGE);} 
         }
       });
      /**为clear按钮添加ActionListener监听器，并且对可能出现的异常进行捕获*/
       clear.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            try{
                ObjectOutputStream out=new ObjectOutputStream(
                new FileOutputStream("note.dat"));
                al.clear();
                out.close();
            }catch(Exception ex){}
             nametext.setText("");
             ziptext.setText("");
             addtext.setText("");
             teltext.setText("");
             mobtext.setText("");
             emailtext.setText("");
            }
             });
      
             
            
            setSize(300,200);//设置窗口尺寸
            setResizable(true);
            setClosable(true);
            setMaximizable(true);
            setIconifiable(true);
            setVisible(true);
            }
         }
       /**
          *定义类Note，类继承了接口Serializable
       */
       class Note implements Serializable{
           public String name;
           public String zip;
           public String address;
           public String telephone;
           public String mobile;
           public String email;
           public Note(){}
       }
       
       
  class MyMedia{
  String mediaName;
  float price;
  String press;
  String artist;
  
     MyMedia(String nametemp,float pricetemp,String presstemp,String artisttemp){
         mediaName=nametemp;
         price=pricetemp;
         press=presstemp;
         artist=artisttemp;
         }
         
         String getName(){
            return mediaName;
         }
         
         float getPrice(){
             return price;
         }
         
         String getPress(){
            return press;
         }
         
         String getArtist(){
            return artist;
         }
         
         void setName(String nametemp){
            mediaName=nametemp;
         }
         
         void setPrice(float pricetemp){
            price=pricetemp;
         }
         
         void setPress(String presstemp){
            press=presstemp;
         }
         
         void setArtist(String artisttemp){
            artist=artisttemp;
         }
         }
         
         class MyCD extends MyMedia{
            String cdISRC;
            String cdPublisher;
            
            MyCD(String cn,float cp,String cpr,String ca,String cpl,String ci){
               super(cn,cp,cpr,ca);
               cdISRC=ci;
               cdPublisher=cpl;
            }
            
            String getCDISRC(){
               return cdISRC;
            }
            
            String getCDPublisher(){
               return cdPublisher;
            }
            
            void setCDISRC(String cdISRCtemp){
                 cdISRC=cdISRCtemp;
            }
            
            void setCDPublisher(String cdPublishertemp){
                 cdPublisher=cdPublishertemp;
            }
           }