Java设计模块系列之书店管理系统单机版(三)

/* * AddPanel.java * * Created on __DATE__, __TIME__ */package cn.hncu.bookStore.user.ui;import javax.swing.JFrame;import javax.swing.JOptionPane;import cn.hncu.bookStore.common.UserTypeEnum;import cn.hncu.bookStore.user.business.ebi.UserEbi;import cn.hncu.bookStore.user.business.factory.UserEbiFactory;import cn.hncu.bookStore.user.vo.UserModel;import cn.hncu.bookStore.util.FileIoUtil;/** * * @author 陈浩翔 */public class AddPanel extends javax.swing.JPanel { private JFrame mainFrame = null; /** Creates new form AddPanel */ public AddPanel(JFrame mainFrame) {  this.mainFrame = mainFrame;  initComponents();  myInitData(); } private void myInitData() {  for (UserTypeEnum type : UserTypeEnum.values()) {   combType.addItem(type.getName());  } } /** 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();  jLabel2 = new javax.swing.JLabel();  tfdName = new javax.swing.JTextField();  jLabel3 = new javax.swing.JLabel();  tfdUuid = new javax.swing.JTextField();  jLabel4 = new javax.swing.JLabel();  tfdPwd2 = new javax.swing.JPasswordField();  jLabel5 = new javax.swing.JLabel();  jLabel6 = new javax.swing.JLabel();  combType = new javax.swing.JComboBox();  tfdPwd = new javax.swing.JPasswordField();  btnAdd = new javax.swing.JButton();  btnBack = new javax.swing.JButton();  setMinimumSize(new java.awt.Dimension(800, 600));  setLayout(null);  jLabel1.setFont(new java.awt.Font("微软雅黑", 1, 48));  jLabel1.setForeground(new java.awt.Color(204, 0, 0));  jLabel1.setText("/u6dfb/u52a0/u7528/u6237");  add(jLabel1);  jLabel1.setBounds(330, 30, 230, 80);  jLabel2.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel2.setText("/u7528/u6237/u7c7b/u578b:");  add(jLabel2);  jLabel2.setBounds(90, 310, 90, 30);  tfdName.setFont(new java.awt.Font("Dialog", 1, 18));  tfdName.setAutoscrolls(false);  add(tfdName);  tfdName.setBounds(470, 160, 120, 30);  jLabel3.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel3.setText("uuid:");  add(jLabel3);  jLabel3.setBounds(120, 160, 50, 30);  tfdUuid.setFont(new java.awt.Font("Dialog", 1, 12));  add(tfdUuid);  tfdUuid.setBounds(190, 160, 110, 30);  jLabel4.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel4.setText("/u59d3/u540d:");  add(jLabel4);  jLabel4.setBounds(410, 160, 50, 30);  tfdPwd2.setFont(new java.awt.Font("宋体", 1, 18));  add(tfdPwd2);  tfdPwd2.setBounds(470, 240, 170, 30);  jLabel5.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel5.setText("/u5bc6/u7801:");  add(jLabel5);  jLabel5.setBounds(120, 240, 50, 30);  jLabel6.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel6.setText("/u786e/u8ba4/u5bc6/u7801:");  add(jLabel6);  jLabel6.setBounds(380, 240, 90, 30);  combType.setFont(new java.awt.Font("Dialog", 1, 18));  combType.setForeground(new java.awt.Color(51, 51, 255));  combType.setModel(new javax.swing.DefaultComboBoxModel(    new String[] { "请选择..." }));  add(combType);  combType.setBounds(190, 310, 160, 30);  tfdPwd.setFont(new java.awt.Font("宋体", 1, 18));  add(tfdPwd);  tfdPwd.setBounds(190, 240, 160, 30);  btnAdd.setFont(new java.awt.Font("Dialog", 1, 24));  btnAdd.setForeground(new java.awt.Color(0, 204, 204));  btnAdd.setText("/u6dfb/u52a0");  btnAdd.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnAddActionPerformed(evt);   }  });  add(btnAdd);  btnAdd.setBounds(190, 430, 120, 60);  btnBack.setFont(new java.awt.Font("Dialog", 1, 24));  btnBack.setForeground(new java.awt.Color(0, 204, 204));  btnBack.setText("/u8fd4/u56de");  btnBack.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnBackActionPerformed(evt);   }  });  add(btnBack);  btnBack.setBounds(520, 430, 120, 60); }// </editor-fold> //GEN-END:initComponents private void back() {  mainFrame.setContentPane(new ListPanel(mainFrame));  mainFrame.validate(); } /**  *监听返回按钮  * @param 返回按钮的点击监听  */ private void btnBackActionPerformed(java.awt.event.ActionEvent evt) {  back(); } private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {  //1收集参数  String uuid = tfdUuid.getText();  String name = tfdName.getText();  String pwd = new String(tfdPwd.getPassword());  String pwd2 = new String(tfdPwd2.getPassword());  //System.out.println(uuid);  //System.out.println(uuid+","+name+","+pwd);  if (uuid.equals("") || uuid.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "用户ID为空，请重新输入！");   return;  }  if (name.equals("") || name.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "用户名为空，请重新输入！");   return;  }  if (!pwd.equals(pwd2) || pwd.equals("") || pwd.equals(null)    || pwd2.equals("") || pwd2.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "两次密码输入不一致或密码为空，请重新输入！");   return;  }  int type = 0;  try {   type = UserTypeEnum.getTypeByName(combType.getSelectedItem()     .toString());  } catch (Exception e) {   JOptionPane.showMessageDialog(mainFrame, "请指定用户类型!");   return;  }  //2组织参数  UserModel user = new UserModel();  user.setName(name);  user.setPwd(pwd);  user.setType(type);  user.setUuid(uuid);  //3调用逻辑层  UserEbi ebi = UserEbiFactory.getUserEbi();  //4根据调用返回结果导向不同页面  if (ebi.create(user)) {   back();  } else {   JOptionPane.showMessageDialog(null, "该用户已经存在!");  } } //GEN-BEGIN:variables // Variables declaration - do not modify private javax.swing.JButton btnAdd; private javax.swing.JButton btnBack; private javax.swing.JComboBox combType; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JLabel jLabel5; private javax.swing.JLabel jLabel6; private javax.swing.JTextField tfdName; private javax.swing.JPasswordField tfdPwd; private javax.swing.JPasswordField tfdPwd2; private javax.swing.JTextField tfdUuid; // End of variables declaration//GEN-END:variables}

/* * DeletePanel.java * * Created on __DATE__, __TIME__ */package cn.hncu.bookStore.user.ui;import javax.swing.JFrame;import javax.swing.JOptionPane;import cn.hncu.bookStore.common.UserTypeEnum;import cn.hncu.bookStore.user.business.ebi.UserEbi;import cn.hncu.bookStore.user.business.factory.UserEbiFactory;import cn.hncu.bookStore.user.vo.UserModel;import cn.hncu.bookStore.util.FileIoUtil;/** *  * @author 陈浩翔 * * @version 1.0 */public class DeletePanel extends javax.swing.JPanel { private JFrame mainFrame = null; private String uuid = null; /** Creates new form DeletePanel   * @param uuid */ public DeletePanel(JFrame mainFrame, String uuid) {  this.mainFrame = mainFrame;  this.uuid = uuid;  initComponents();  myInitData(); } private void myInitData() {  UserEbi user = UserEbiFactory.getUserEbi();  UserModel userModel = user.getSingle(uuid);  tfdName.setText(userModel.getName());  tfdUuid.setText(userModel.getUuid());  tfdPwd.setText(userModel.getPwd());  tfdType.setText(UserTypeEnum.getNameByType(userModel.getType()));  tfdName.setEditable(false);  tfdPwd.setEditable(false);  tfdType.setEditable(false);  tfdUuid.setEditable(false); } //GEN-BEGIN:initComponents // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() {  jLabel1 = new javax.swing.JLabel();  jLabel2 = new javax.swing.JLabel();  tfdName = new javax.swing.JTextField();  jLabel3 = new javax.swing.JLabel();  tfdUuid = new javax.swing.JTextField();  jLabel4 = new javax.swing.JLabel();  jLabel5 = new javax.swing.JLabel();  tfdPwd = new javax.swing.JTextField();  tfdType = new javax.swing.JTextField();  btnBack = new javax.swing.JButton();  btnDelete = new javax.swing.JButton();  setMinimumSize(new java.awt.Dimension(800, 600));  setLayout(null);  jLabel1.setFont(new java.awt.Font("微软雅黑", 1, 48));  jLabel1.setForeground(new java.awt.Color(204, 0, 0));  jLabel1.setText("/u5220/u9664/u7528/u6237");  add(jLabel1);  jLabel1.setBounds(330, 30, 230, 80);  jLabel2.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel2.setText("/u7528/u6237/u7c7b/u578b:");  add(jLabel2);  jLabel2.setBounds(100, 310, 90, 30);  tfdName.setFont(new java.awt.Font("Dialog", 1, 18));  tfdName.setAutoscrolls(false);  add(tfdName);  tfdName.setBounds(480, 160, 120, 30);  jLabel3.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel3.setText("uuid:");  add(jLabel3);  jLabel3.setBounds(130, 160, 50, 30);  tfdUuid.setFont(new java.awt.Font("Dialog", 0, 11));  add(tfdUuid);  tfdUuid.setBounds(200, 160, 110, 30);  jLabel4.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel4.setText("/u59d3/u540d:");  add(jLabel4);  jLabel4.setBounds(420, 160, 50, 30);  jLabel5.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel5.setText("/u5bc6/u7801:");  add(jLabel5);  jLabel5.setBounds(130, 240, 50, 30);  tfdPwd.setFont(new java.awt.Font("Tahoma", 1, 12));  add(tfdPwd);  tfdPwd.setBounds(200, 240, 160, 30);  tfdType.setFont(new java.awt.Font("Dialog", 1, 12));  add(tfdType);  tfdType.setBounds(200, 310, 160, 30);  btnBack.setFont(new java.awt.Font("Dialog", 1, 24));  btnBack.setForeground(new java.awt.Color(0, 204, 204));  btnBack.setText("/u8fd4/u56de");  btnBack.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnBackActionPerformed(evt);   }  });  add(btnBack);  btnBack.setBounds(540, 450, 120, 60);  btnDelete.setFont(new java.awt.Font("Dialog", 1, 24));  btnDelete.setForeground(new java.awt.Color(0, 204, 204));  btnDelete.setText("/u5220/u9664");  btnDelete.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnDeleteActionPerformed(evt);   }  });  add(btnDelete);  btnDelete.setBounds(210, 450, 120, 60); }// </editor-fold> //GEN-END:initComponents private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {  //3调用逻辑层  if (UserEbiFactory.getUserEbi().delete(uuid)) {   back();  } else {   JOptionPane.showMessageDialog(mainFrame, "该用户已经不存在!");  }  //4根据调用返回结果导向不同页面 } private void btnBackActionPerformed(java.awt.event.ActionEvent evt) {  back(); } private void back() {  mainFrame.setContentPane(new ListPanel(mainFrame));  mainFrame.validate(); } //GEN-BEGIN:variables // Variables declaration - do not modify private javax.swing.JButton btnBack; private javax.swing.JButton btnDelete; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JLabel jLabel5; private javax.swing.JTextField tfdName; private javax.swing.JTextField tfdPwd; private javax.swing.JTextField tfdType; private javax.swing.JTextField tfdUuid; // End of variables declaration//GEN-END:variables}

/* * UpdatePanel.java * * Created on __DATE__, __TIME__ */package cn.hncu.bookStore.user.ui;import javax.swing.JFrame;import javax.swing.JOptionPane;import cn.hncu.bookStore.common.UserTypeEnum;import cn.hncu.bookStore.user.business.ebi.UserEbi;import cn.hncu.bookStore.user.business.factory.UserEbiFactory;import cn.hncu.bookStore.user.vo.UserModel;/** *  * @author 陈浩翔 * * @version 1.0 */public class UpdatePanel extends javax.swing.JPanel { private JFrame mainFrame = null; private String uuid = null; /**  * Creates new form UpdatePanel  *   * @param uuid  * @param mainFrame  */ public UpdatePanel(JFrame mainFrame, String uuid) {  this.mainFrame = mainFrame;  this.uuid = uuid;  initComponents();  myInitData(); } private void myInitData() {  UserEbi ebi = UserEbiFactory.getUserEbi();  UserModel user = ebi.getSingle(uuid);  tfdUuid.setText(user.getUuid());  tfdUuid.setEditable(false);  tfdName.setText(user.getName());  tfdPwd.setText(user.getPwd());  tfdPwd2.setText(user.getPwd());  combType.removeAllItems();  String usert = UserTypeEnum.getNameByType(user.getType());  combType.addItem(usert);  for (UserTypeEnum userType : UserTypeEnum.values()) {   if (!userType.getName().equals(usert)) {    combType.addItem(userType.getName());   }  } } // GEN-BEGIN:initComponents // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() {  jLabel1 = new javax.swing.JLabel();  jLabel2 = new javax.swing.JLabel();  tfdName = new javax.swing.JTextField();  jLabel3 = new javax.swing.JLabel();  tfdUuid = new javax.swing.JTextField();  jLabel4 = new javax.swing.JLabel();  tfdPwd2 = new javax.swing.JPasswordField();  jLabel5 = new javax.swing.JLabel();  jLabel6 = new javax.swing.JLabel();  tfdPwd = new javax.swing.JPasswordField();  combType = new javax.swing.JComboBox();  btnBack = new javax.swing.JButton();  btnUpdate = new javax.swing.JButton();  setMinimumSize(new java.awt.Dimension(800, 600));  setLayout(null);  jLabel1.setFont(new java.awt.Font("微软雅黑", 1, 48));  jLabel1.setForeground(new java.awt.Color(204, 0, 0));  jLabel1.setText("/u4fee/u6539/u7528/u6237");  add(jLabel1);  jLabel1.setBounds(320, 30, 230, 80);  jLabel2.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel2.setText("/u7528/u6237/u7c7b/u578b:");  add(jLabel2);  jLabel2.setBounds(90, 310, 90, 30);  tfdName.setFont(new java.awt.Font("Dialog", 1, 18));  tfdName.setAutoscrolls(false);  add(tfdName);  tfdName.setBounds(470, 160, 120, 30);  jLabel3.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel3.setText("uuid:");  add(jLabel3);  jLabel3.setBounds(120, 160, 50, 30);  tfdUuid.setFont(new java.awt.Font("Dialog", 1, 12));  add(tfdUuid);  tfdUuid.setBounds(190, 160, 110, 30);  jLabel4.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel4.setText("/u59d3/u540d:");  add(jLabel4);  jLabel4.setBounds(410, 160, 50, 30);  tfdPwd2.setFont(new java.awt.Font("Dialog", 1, 18));  add(tfdPwd2);  tfdPwd2.setBounds(470, 240, 170, 30);  jLabel5.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel5.setText("/u5bc6/u7801:");  add(jLabel5);  jLabel5.setBounds(120, 240, 50, 30);  jLabel6.setFont(new java.awt.Font("微软雅黑", 0, 18));  jLabel6.setText("/u786e/u8ba4/u5bc6/u7801:");  add(jLabel6);  jLabel6.setBounds(380, 240, 90, 30);  tfdPwd.setFont(new java.awt.Font("宋体", 1, 18));  add(tfdPwd);  tfdPwd.setBounds(190, 240, 160, 30);  combType.setFont(new java.awt.Font("Dialog", 1, 12));  combType.setForeground(new java.awt.Color(51, 0, 255));  combType.setModel(new javax.swing.DefaultComboBoxModel(    new String[] { "" }));  add(combType);  combType.setBounds(190, 310, 170, 30);  btnBack.setFont(new java.awt.Font("Dialog", 1, 24));  btnBack.setForeground(new java.awt.Color(0, 204, 204));  btnBack.setText("/u8fd4/u56de");  btnBack.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnBackActionPerformed(evt);   }  });  add(btnBack);  btnBack.setBounds(500, 430, 120, 60);  btnUpdate.setFont(new java.awt.Font("Dialog", 1, 24));  btnUpdate.setForeground(new java.awt.Color(0, 204, 204));  btnUpdate.setText("/u4fee/u6539");  btnUpdate.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnUpdateActionPerformed(evt);   }  });  add(btnUpdate);  btnUpdate.setBounds(170, 430, 120, 60); }// </editor-fold>  // GEN-END:initComponents private void btnUpdateActionPerformed(java.awt.event.ActionEvent evt) {  // 1收集参数  String uuid = tfdUuid.getText();  String name = tfdName.getText();  String pwd = new String(tfdPwd.getPassword());  String pwd2 = new String(tfdPwd2.getPassword());  if (uuid.equals("") || uuid.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "用户ID为空，请重新输入！");   return;  }  if (name.equals("") || name.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "用户名为空，请重新输入！");   return;  }  if (!pwd.equals(pwd2) || pwd.equals("") || pwd.equals(null)    || pwd2.equals("") || pwd2.equals(null)) {   JOptionPane.showMessageDialog(mainFrame, "两次密码输入不一致或密码为空，请重新输入！");   return;  }  int type = 0;  try {   type = UserTypeEnum.getTypeByName(combType.getSelectedItem()     .toString());  } catch (Exception e) {   JOptionPane.showMessageDialog(mainFrame, "请指定用户类型!");   return;  }  // 2组织参数  UserModel user = new UserModel();  user.setName(name);  user.setPwd(pwd);  user.setType(type);  user.setUuid(uuid);  // 3调用逻辑层  UserEbi ebi = UserEbiFactory.getUserEbi();  // 4根据调用返回结果导向不同页面  if (ebi.update(user)) {   back();  } else {   JOptionPane.showMessageDialog(null, "该用户已经不存在!");  } } private void btnBackActionPerformed(java.awt.event.ActionEvent evt) {  back(); } private void back() {  mainFrame.setContentPane(new ListPanel(mainFrame));  mainFrame.validate(); } // GEN-BEGIN:variables // Variables declaration - do not modify private javax.swing.JButton btnBack; private javax.swing.JButton btnUpdate; private javax.swing.JComboBox combType; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JLabel jLabel5; private javax.swing.JLabel jLabel6; private javax.swing.JTextField tfdName; private javax.swing.JPasswordField tfdPwd; private javax.swing.JPasswordField tfdPwd2; private javax.swing.JTextField tfdUuid; // End of variables declaration//GEN-END:variables}

/* * ListPanel.java * * Created on __DATE__, __TIME__ */package cn.hncu.bookStore.user.ui;import java.util.List;import javax.swing.JFrame;import javax.swing.JOptionPane;import cn.hncu.bookStore.user.business.ebi.UserEbi;import cn.hncu.bookStore.user.business.factory.UserEbiFactory;import cn.hncu.bookStore.user.vo.UserModel;/** * 表现层-用户列表面板 *  * @author 陈浩翔 * @version 1.0 */public class ListPanel extends javax.swing.JPanel { private JFrame mainFrame = null; /** Creates new form ListPanel */ public ListPanel(JFrame mainFrame) {  this.mainFrame = mainFrame;  initComponents();  myInitData(); } /**  * 读取所有用户并添加进列表  */ private void myInitData() {  UserEbi user = UserEbiFactory.getUserEbi();  List<UserModel> list = user.getAll();  userLists.setListData(list.toArray()); } //GEN-BEGIN:initComponents // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() {  jScrollPane1 = new javax.swing.JScrollPane();  userLists = new javax.swing.JList();  jLabel1 = new javax.swing.JLabel();  btnToAdd = new javax.swing.JButton();  btnToDelete = new javax.swing.JButton();  btnToUpdate = new javax.swing.JButton();  setMinimumSize(new java.awt.Dimension(800, 600));  setLayout(null);  userLists.setModel(new javax.swing.AbstractListModel() {   String[] strings = { "" };   public int getSize() {    return strings.length;   }   public Object getElementAt(int i) {    return strings[i];   }  });  jScrollPane1.setViewportView(userLists);  add(jScrollPane1);  jScrollPane1.setBounds(170, 80, 480, 230);  jLabel1.setFont(new java.awt.Font("Tahoma", 1, 48));  jLabel1.setForeground(new java.awt.Color(204, 0, 51));  jLabel1.setText("User List");  add(jLabel1);  jLabel1.setBounds(300, 0, 260, 80);  btnToAdd.setFont(new java.awt.Font("Dialog", 1, 24));  btnToAdd.setForeground(new java.awt.Color(0, 102, 102));  btnToAdd.setText("/u6dfb/u52a0/u7528/u6237");  btnToAdd.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnToAddActionPerformed(evt);   }  });  add(btnToAdd);  btnToAdd.setBounds(160, 350, 150, 50);  btnToDelete.setFont(new java.awt.Font("Dialog", 1, 24));  btnToDelete.setForeground(new java.awt.Color(0, 102, 102));  btnToDelete.setText("/u5220/u9664/u7528/u6237");  btnToDelete.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnToDeleteActionPerformed(evt);   }  });  add(btnToDelete);  btnToDelete.setBounds(510, 350, 150, 50);  btnToUpdate.setFont(new java.awt.Font("Dialog", 1, 24));  btnToUpdate.setForeground(new java.awt.Color(0, 102, 102));  btnToUpdate.setText("/u4fee/u6539/u7528/u6237");  btnToUpdate.addActionListener(new java.awt.event.ActionListener() {   public void actionPerformed(java.awt.event.ActionEvent evt) {    btnToUpdateActionPerformed(evt);   }  });  add(btnToUpdate);  btnToUpdate.setBounds(160, 450, 150, 50); }// </editor-fold> //GEN-END:initComponents private void btnToUpdateActionPerformed(java.awt.event.ActionEvent evt) {  UserModel user = (UserModel) userLists.getSelectedValue();  if (user == null) {   JOptionPane.showMessageDialog(mainFrame, "请选择要修改的用户!");   return;  }  String uuid = user.getUuid();  mainFrame.setContentPane(new UpdatePanel(mainFrame, uuid));  mainFrame.validate(); } private void btnToDeleteActionPerformed(java.awt.event.ActionEvent evt) {  UserModel user = (UserModel) userLists.getSelectedValue();  if (user == null) {   JOptionPane.showMessageDialog(mainFrame, "请选择要删除的用户!");   return;  }  String uuid = user.getUuid();  mainFrame.setContentPane(new DeletePanel(mainFrame, uuid));  mainFrame.validate(); } private void btnToAddActionPerformed(java.awt.event.ActionEvent evt) {  mainFrame.setContentPane(new AddPanel(mainFrame));  mainFrame.validate(); } //GEN-BEGIN:variables // Variables declaration - do not modify private javax.swing.JButton btnToAdd; private javax.swing.JButton btnToDelete; private javax.swing.JButton btnToUpdate; private javax.swing.JLabel jLabel1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JList userLists; // End of variables declaration//GEN-END:variables}