两种不同的实现mvc模式(1)

 view接口,供所有view 实现

public interface View {  
        public void refreshContactView(String firstName, String lastName);  
    }  

model  java 代码 

import java.util.ArrayList;  
    import java.util.Iterator;  
      
    public class TextModel {  
        private String firstName;  
        private String lastName;  
        
        private ArrayList contactViews = new ArrayList();//用来存不同的视图的容器  
          
        public TextModel(){  
            this(null);  
        }  
        public TextModel(View view){  
            firstName = "";  
            lastName = "";  
              
            if (view != null){  
                contactViews.add(view);  
            }  
        }  
        public void addContactView(View view){  
            if (!contactViews.contains(view)){  
                contactViews.add(view);  
            }  
        }  
          
        public void removeContactView(View view){  
            contactViews.remove(view);  
        }  
      
        public void updateModel(String newFirstName, String newLastName){  
              
                if (!isEmptyString(newFirstName)){  
                    setFirstName(newFirstName);  
                }  
                if (!isEmptyString(newLastName)){  
                    setLastName(newLastName);  
                }  
                  
                updateView();  
            }  
        private void updateView(){  
            Iterator notifyViews = contactViews.iterator();  
            while (notifyViews.hasNext()){  
                ((View)notifyViews.next()).refreshContactView(firstName, lastName);  
            }  
        }  
          
        public String getFirstName(){ return firstName; }  
        public String getLastName(){ return lastName; }  
         
          
        public void setFirstName(String newFirstName){ firstName = newFirstName; }  
        public void setLastName(String newLastName){ lastName = newLastName; }  
         
        private boolean isEmptyString(String input){  
            return ((input == null) || input.equals(""));  
        }  
    }  

用来修改的视图 构造里传入model ,同时启动控制器类

public class EditView extends JPanel implements View{  
      
        private static final String UPDATE_BUTTON = "Update";  
      
        private static final String EXIT_BUTTON = "Exit";  
      
        private static final String CONTACT_FIRST_NAME = "First Name  ";  
      
        private static final String CONTACT_LAST_NAME = "Last Name  ";  
      
        private static final int FNAME_COL_WIDTH = 25;  
      
        private static final int LNAME_COL_WIDTH = 40;  
      
        private EditController controller;  
      
        private JLabel firstNameLabel, lastNameLabel;  
      
        private JTextField firstName, lastName;  
      
        private JButton update, exit;  
      
        public EditView(TextModel model) {  
              
            controller = new EditController(model,this);  
            createGui();  
        }  
      
        public void createGui() {  
            update = new JButton(UPDATE_BUTTON);  
            exit = new JButton(EXIT_BUTTON);  
      
            firstNameLabel = new JLabel(CONTACT_FIRST_NAME);  
            lastNameLabel = new JLabel(CONTACT_LAST_NAME);  
      
            firstName = new JTextField(FNAME_COL_WIDTH);  
            lastName = new JTextField(LNAME_COL_WIDTH);  
      
            JPanel editPanel = new JPanel();  
            editPanel.setLayout(new BoxLayout(editPanel, BoxLayout.X_AXIS));  
      
            JPanel labelPanel = new JPanel();  
            labelPanel.setLayout(new GridLayout(0, 1));  
      
            labelPanel.add(firstNameLabel);  
            labelPanel.add(lastNameLabel);  
      
            editPanel.add(labelPanel);  
      
            JPanel fieldPanel = new JPanel();  
            fieldPanel.setLayout(new GridLayout(0, 1));  
      
            fieldPanel.add(firstName);  
            fieldPanel.add(lastName);  
      
            editPanel.add(fieldPanel);  
      
            JPanel controlPanel = new JPanel();  
            controlPanel.add(update);  
            controlPanel.add(exit);  
            update.addActionListener(controller);  
            exit.addActionListener(new Handler());  
      
            setLayout(new BorderLayout());  
            add(editPanel, BorderLayout.CENTER);  
            add(controlPanel, BorderLayout.SOUTH);  
        }  
      
        public Object getUpdateRef() {  
            return update;  
        }  
      
        public String getFirstName() {  
            return firstName.getText();  
        }  
      
        public String getLastName() {  
            return lastName.getText();  
        }  
      
        public void refreshContactView(String newFirstName, String newLastName) {  
            // TODO 自动生成方法存根  
            firstName.setText(newFirstName);  
            lastName.setText(newLastName);  
      
        }  
      
        private class Handler implements ActionListener {  
            public void actionPerformed(ActionEvent event) {  
                System.exit(0);  
            }  
        }  
      
    }  

控制类,把model类和View类注册进来,通过这个类去改变model,model改变时 * 调用自身的update方法,更新view

import java.awt.event.ActionEvent;  
    import java.awt.event.ActionListener;  
      
    public class EditController implements ActionListener {  
        private TextModel model;  
        private EditView view;  
        
        public EditController(TextModel model2, EditView view2) {  
            // TODO 自动生成构造函数存根  
            view = view2;  
            model = model2;  
        }  
      
        public void actionPerformed(ActionEvent evt){  
            Object source = evt.getSource();  
            if (source == view.getUpdateRef()){  
                updateModel();  
            }  
        }  
        private void updateModel(){  
            String firstName = null;  
            String lastName = null;  
            if (view.getFirstName()!=null){  
                firstName = view.getFirstName();  
            }  
            if (view.getLastName()!=null){  
                lastName = view.getLastName();  
            }  
            model.updateModel( firstName, lastName);  
        }  
    }  

用来显示model数据视图

import java.awt.BorderLayout;  
    import javax.swing.JPanel;  
    import javax.swing.JScrollPane;  
    import javax.swing.JTextArea;  
      
    class DisplayView extends JPanel implements View {  
        private JTextArea display;  
      
        public DisplayView() {  
            createGui();  
        }  
      
        public void createGui() {  
            setLayout(new BorderLayout());  
            display = new JTextArea(10, 40);  
            display.setEditable(false);  
            JScrollPane scrollDisplay = new JScrollPane(display);  
            this.add(scrollDisplay, BorderLayout.CENTER);  
        }  
      
        public void refreshContactView(String newFirstName, String newLastName) {  
            display.setText("UPDATED CONTACT:\nNEW VALUES:\n" + "\tName: "  
                    + newFirstName + " " + newLastName + "\n");  
        }  
      
    }  

整个mvc用到model controller view 都是联系起来的

*model-->view

*view--->model

*controller把它们联系起来

import java.awt.event.WindowAdapter;  
    import java.awt.event.WindowEvent;  
    import java.io.Serializable;  
    import javax.swing.JFrame;  
    import javax.swing.JPanel;  
      
    public class RunMVCPattern {  
          
        public static void main(String [] arguments){     
             
            TextModel model = new TextModel();  
              
            EditView editorView = new EditView(model);///增加视图  
            model.addContactView(editorView);  
            createGui(editorView, "Contact Edit Window");  
              
            System.out.println("Creating DisplayView");  
            DisplayView displayView = new DisplayView();  
            model.addContactView(displayView);  
            createGui(displayView, " Display Window");  
        }  
          
        private static void createGui(JPanel contents, String title){  
            JFrame applicationFrame = new JFrame(title);  
            applicationFrame.getContentPane().add(contents);  
            applicationFrame.pack();//自动适应大小  
            applicationFrame.setVisible(true);  
        }  
    }