VE设计#2表现层：listPanelb

在myeclipse环境下，用我上一篇所说的new一个panel组件，取名为listPanel。这个面板是用来显示我们一进程序的界面。将此面板加到JFrame中显示。然后利用界面传参技术，将AddressApp（JFrame）作为一个参数mianFrame传入listPanel来实现调度。

作为ui层我们要显示的话就要用Jlist来调用逻辑层来显示数据。这里我们用Myset来做逻辑层。所以Myset中就有一个getAll（）函数来返回一个数组用来构建list。其次我们还要添加转向其他面板的按钮，效果图如下所示：

具体实现代码如下：

/* * listPanel.java * * Created on __DATE__, __TIME__ */package cn.hncu.ui;import javax.swing.Icon;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JList;import javax.swing.JOptionPane;import javax.swing.JPanel;import cn.hncu.busines.Myset;/** * * @author  __USER__ */public class listPanel extends javax.swing.JPanel {private JFrame mainFrame = null;/** Creates new form listPanel */public listPanel(JFrame mainFrame) {this.mainFrame = mainFrame;initComponents();myInitComponents();this.setOpaque(false);Icon bjImage = new ImageIcon("./image/beijing.jpg");JLabel bglbl = new JLabel(bjImage);this.add(bglbl, new Integer(Integer.MIN_VALUE));bglbl.setBounds(0, 0, bjImage.getIconWidth(), bjImage.getIconHeight());this.validate();}public listPanel(JFrame mainFrame,Object[] objs) {this.mainFrame = mainFrame;initComponents();listAddress.setListData(objs);this.setOpaque(false);Icon bjImage = new ImageIcon("./image/beijing.jpg");JLabel bglbl = new JLabel(bjImage);this.add(bglbl, new Integer(Integer.MIN_VALUE));bglbl.setBounds(0, 0, bjImage.getIconWidth(), bjImage.getIconHeight());this.validate();}private void myInitComponents() {Myset set = new Myset();Object objs[] = set.getAll();listAddress.setListData(objs);}/** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. *///GEN-BEGIN:initComponents// <editor-fold defaultstate="collapsed" desc="Generated Code">private void initComponents() {jLabel1 = new javax.swing.JLabel();btnAdd = new javax.swing.JButton();btnUpdate = new javax.swing.JButton();btnDelete = new javax.swing.JButton();jScrollPane1 = new javax.swing.JScrollPane();listAddress = new javax.swing.JList();btnQuery = new javax.swing.JButton();setMinimumSize(new java.awt.Dimension(800, 600));setPreferredSize(new java.awt.Dimension(800, 600));setLayout(null);jLabel1.setFont(new java.awt.Font("Microsoft YaHei UI", 1, 36));jLabel1.setForeground(new java.awt.Color(0, 255, 255));jLabel1.setText("\u5730\u5740APP");add(jLabel1);jLabel1.setBounds(300, 40, 160, 47);btnAdd.setBackground(new java.awt.Color(153, 153, 255));btnAdd.setFont(new java.awt.Font("Microsoft YaHei UI", 2, 36));btnAdd.setForeground(new java.awt.Color(51, 51, 255));btnAdd.setText("add...");btnAdd.addActionListener(new java.awt.event.ActionListener() {public void actionPerformed(java.awt.event.ActionEvent evt) {btnAddActionPerformed(evt);}});add(btnAdd);btnAdd.setBounds(130, 370, 190, 60);btnUpdate.setBackground(new java.awt.Color(255, 102, 153));btnUpdate.setFont(new java.awt.Font("Microsoft YaHei UI", 2, 36));btnUpdate.setForeground(new java.awt.Color(204, 204, 255));btnUpdate.setText("update...");btnUpdate.addActionListener(new java.awt.event.ActionListener() {public void actionPerformed(java.awt.event.ActionEvent evt) {btnUpdateActionPerformed(evt);}});add(btnUpdate);btnUpdate.setBounds(440, 370, 210, 60);btnDelete.setBackground(new java.awt.Color(255, 0, 51));btnDelete.setFont(new java.awt.Font("Microsoft YaHei UI", 2, 24));btnDelete.setForeground(new java.awt.Color(255, 51, 255));btnDelete.setText("Delete...");btnDelete.addActionListener(new java.awt.event.ActionListener() {public void actionPerformed(java.awt.event.ActionEvent evt) {btnDeleteActionPerformed(evt);}});add(btnDelete);btnDelete.setBounds(130, 460, 180, 50);listAddress.setModel(new javax.swing.AbstractListModel() {String[] strings = { "" };public int getSize() {return strings.length;}public Object getElementAt(int i) {return strings[i];}});jScrollPane1.setViewportView(listAddress);add(jScrollPane1);jScrollPane1.setBounds(140, 140, 460, 210);btnQuery.setFont(new java.awt.Font("Microsoft YaHei UI", 3, 24));btnQuery.setForeground(new java.awt.Color(0, 153, 255));btnQuery.setText("\u8f6c\u5230\u67e5\u8be2...");btnQuery.addActionListener(new java.awt.event.ActionListener() {public void actionPerformed(java.awt.event.ActionEvent evt) {btnQueryActionPerformed(evt);}});add(btnQuery);btnQuery.setBounds(440, 460, 200, 50);}// </editor-fold>//GEN-END:initComponentsprivate void btnQueryActionPerformed(java.awt.event.ActionEvent evt) {mainFrame.setContentPane(new QueryPanel(mainFrame));mainFrame.validate();}//private JList<Object> getListAddress() {//if(listAddress==null){//listAddress=new JList<Object>();//}//Myset set=new Myset();//Object objs[]=set.getAll();//listAddress.setListData(objs);//return listAddress;//}private void btnUpdateActionPerformed(java.awt.event.ActionEvent evt) {String updateStr = (String) listAddress.getSelectedValue();if(updateStr!=null){mainFrame.setContentPane(new updatePanel(mainFrame, updateStr));//mainJrame.setContentPane(new updatePanel(mainJrame,updateStr,index));mainFrame.validate();}else{JOptionPane.showMessageDialog(this, "请添加联系人");mainFrame.setContentPane(new addJpanel(mainFrame));mainFrame.validate();}}private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {String deleteStr = (String) listAddress.getSelectedValue();if(deleteStr!=null){mainFrame.setContentPane(new deleteJpanel(mainFrame, deleteStr));mainFrame.validate();}else{JOptionPane.showMessageDialog(this, "无联系人，请添加");mainFrame.setContentPane(new addJpanel(mainFrame));mainFrame.validate();}}private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {mainFrame.setContentPane(new addJpanel(mainFrame));mainFrame.validate();}//GEN-BEGIN:variables// Variables declaration - do not modifyprivate javax.swing.JButton btnAdd;private javax.swing.JButton btnDelete;private javax.swing.JButton btnQuery;private javax.swing.JButton btnUpdate;private javax.swing.JLabel jLabel1;private javax.swing.JScrollPane jScrollPane1;private javax.swing.JList listAddress;// End of variables declaration//GEN-END:variables}