我有一个JFRAME表单，用于在mysql数据库中注册car和stroe信息。
表单包含以下代码：
package parkingSystem;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JOptionPane;
import javax.persistence.*;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author Dennis
*/
public class RegisterCars extends javax.swing.JFrame {
/**
* Creates new form RegisterCars
*/
//Database connection variables
Connection myConn;
Statement stmt;
String sql;
ResultSet rs;
public RegisterCars() {
initComponents();
try {
Class.forName("com.mysql.jdbc.Driver"); //
myConn = DriverManager.getConnection("jdbc:mysql://localhost/parkingsystem", "root", ""); //
stmt = myConn.createStatement();
loadCars();
} catch (ClassNotFoundException e) {
System.out.println("Driver not found" + e.getMessage());
} catch (SQLException e) {
System.out.println("Database connection Error:" + e.getMessage());
}
System.out.println("DB CONNECTED");
}
/**
* 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.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jDesktopPane1 = new javax.swing.JDesktopPane();
entityManager = java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory("parkingsystem?zeroDateTimeBehavior=convertToNullPU").createEntityManager();
carsQuery = java.beans.Beans.isDesignTime() ? null : entityManager.createQuery("SELECT c FROM Cars c");
carsList = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : carsQuery.getResultList();
jPanel1 = new javax.swing.JPanel();
lblLogo = new javax.swing.JLabel();
lblCar = new javax.swing.JLabel();
jPanel2 = new javax.swing.JPanel();
lblPlate = new javax.swing.JLabel();
lblSlot = new javax.swing.JLabel();
lblClient = new javax.swing.JLabel();
txfModel = new javax.swing.JTextField();
txfPlate = new javax.swing.JTextField();
txfColour = new javax.swing.JTextField();
cbxRegistered = new javax.swing.JComboBox();
lblRegistered = new javax.swing.JLabel();
jPanel3 = new javax.swing.JPanel();
btnDelete = new javax.swing.JButton();
btnEdit = new javax.swing.JButton();
btnSave = new javax.swing.JButton();
btnShowCars = new javax.swing.JButton();
btnClose = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jPanel1.setBackground(new java.awt.Color(51, 102, 255));
jPanel1.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
lblLogo.setIcon(new javax.swing.ImageIcon(getClass().getResource("/parkingSystem/images/jkuat-logo.png"))); // NOI18N
jPanel1.add(lblLogo, new org.netbeans.lib.awtextra.AbsoluteConstraints(10, 11, -1, -1));
lblCar.setFont(new java.awt.Font("Verdana", 1, 24)); // NOI18N
lblCar.setForeground(new java.awt.Color(255, 255, 255));
lblCar.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
lblCar.setText("CAR REGISTRATION");
jPanel1.add(lblCar, new org.netbeans.lib.awtextra.AbsoluteConstraints(210, 80, 340, 60));
getContentPane().add(jPanel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 670, 210));
jPanel2.setBackground(new java.awt.Color(255, 255, 255));
jPanel2.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
lblPlate.setText("Plate Number");
jPanel2.add(lblPlate, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 80, 110, 34));
lblSlot.setText("Colour");
jPanel2.add(lblSlot, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 20, 110, 41));
lblClient.setText("Model");
jPanel2.add(lblClient, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 140, 110, 37));
txfModel.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txfModelActionPerformed(evt);
}
});
jPanel2.add(txfModel, new org.netbeans.lib.awtextra.AbsoluteConstraints(130, 80, 211, 45));
txfPlate.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txfPlateActionPerformed(evt);
}
});
jPanel2.add(txfPlate, new org.netbeans.lib.awtextra.AbsoluteConstraints(130, 140, 211, 40));
txfColour.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txfColourActionPerformed(evt);
}
});
jPanel2.add(txfColour, new org.netbeans.lib.awtextra.AbsoluteConstraints(130, 20, 211, 41));
cbxRegistered.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cbxRegisteredActionPerformed(evt);
}
});
jPanel2.add(cbxRegistered, new org.netbeans.lib.awtextra.AbsoluteConstraints(130, 210, 210, 40));
lblRegistered.setText("Registered Cars");
jPanel2.add(lblRegistered, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 210, 90, 35));
jPanel3.setBackground(new java.awt.Color(255, 255, 255));
jPanel3.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)), "Action"));
btnDelete.setText("DELETE");
btnDelete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnDeleteActionPerformed(evt);
}
});
btnEdit.setText("EDIT");
btnEdit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnEditActionPerformed(evt);
}
});
btnSave.setText("SAVE");
btnSave.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnSaveActionPerformed(evt);
}
});
btnShowCars.setText("Show Registered Cars");
btnShowCars.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnShowCarsActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap(38, Short.MAX_VALUE)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(btnShowCars, javax.swing.GroupLayout.DEFAULT_SIZE, 211, Short.MAX_VALUE)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnDelete, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 211, Short.MAX_VALUE)
.addComponent(btnEdit, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addGap(21, 21, 21))
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addComponent(btnSave, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(btnEdit, javax.swing.GroupLayout.PREFERRED_SIZE, 41, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(btnDelete, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(btnShowCars, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(19, Short.MAX_VALUE))
);
jPanel2.add(jPanel3, new org.netbeans.lib.awtextra.AbsoluteConstraints(370, 10, 280, 260));
btnClose.setText("Close");
btnClose.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnCloseActionPerformed(evt);
}
});
jPanel2.add(btnClose, new org.netbeans.lib.awtextra.AbsoluteConstraints(570, 280, 80, 30));
getContentPane().add(jPanel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 210, 670, 320));
setSize(new java.awt.Dimension(685, 569));
setLocationRelativeTo(null);
}// </editor-fold>
private void txfModelActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void txfPlateActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {
if (evt.getSource().equals(btnSave)) {
JOptionPane.showMessageDialog(this, "Successfully Saved Car");
System.out.println("Saving the new car: ");
System.out.println(txfModel.getText() + " is now Saved");
String userInput = txfModel.getText();
if (userInput.length() > 0) {
try {
String sql = "INSERT INTO cars(model,colour,Plate_number)VALUES('" + txfModel.getText() + "','" + txfColour.getText() + "','" + txfPlate.getText() + "')";
System.out.println(sql);
stmt.execute(sql);
txfModel.setText("");
txfColour.setText("");
txfPlate.setText("");
loadCars();
} catch (SQLException x) {
System.out.println("SQL Error while loading Cars:" + x.getMessage());
}
} else {
System.out.println("You have not entered anything");
}
}
System.out.println("SAVING LOADED");// TODO add your handling code here:
}
private void txfColourActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void cbxRegisteredActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void btnEditActionPerformed(java.awt.event.ActionEvent evt) {
if (evt.getSource().equals(btnEdit)) {
JOptionPane.showMessageDialog(this, "Successfully Edited Car");
try {
String carModel = cbxRegistered.getSelectedItem().toString();
String carColour = cbxRegistered.getSelectedItem().toString();
String sql = "UPDATE cars SET Plate_number='" + txfPlate.getText() + "' WHERE Plate_number='" + cbxRegistered.getSelectedItem().toString() + "'";
//String sql2 = "UPDATE cars SET colour='" + txfColour.getText() + "' WHERE Plate_number='" + cbxRegistered.getSelectedItem().toString() + "'";
//String sql3 = "UPDATE cars SET model='" + txfModel.getText() + "' WHERE Plate_number='" + cbxRegistered.getSelectedItem().toString() + "'";
stmt.execute(sql);
//stmt.execute(sql2);
//stmt.execute(sql3);
txfPlate.setText("");
loadCars();
} catch (SQLException x) {
System.out.println("Error while editing " + x.getMessage());
}
}
System.out.println("EDIT LOADED");// TODO add your handling code here:
}
private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {
if (evt.getSource().equals(btnDelete)) {
JOptionPane.showMessageDialog(this, "Successfully Deleted Car");
try {
String sql = "UPDATE cars SET isactive=0 WHERE Plate_number='" + cbxRegistered.getSelectedItem().toString() + "'";
stmt.execute(sql);
txfColour.setText("");
txfModel.setText("");
txfPlate.setText("");
loadCars();
} catch (SQLException x) {
System.out.println("Error while deleting a departments:" + x.getMessage());
}
} // TODO add your handling code here:
}
private void btnCloseActionPerformed(java.awt.event.ActionEvent evt) {
dispose(); // TODO add your handling code here:
}
private void btnShowCarsActionPerformed(java.awt.event.ActionEvent evt) {
new CarsTable().setVisible(true); // TODO add your handling code here:
}
private void loadCars() {
try {
cbxRegistered.removeAllItems();
System.out.println("Loading saved cars");
String sql;
sql = "SELECT * FROM cars WHERE isactive = 1";
System.out.println(sql);
rs = stmt.executeQuery(sql);
while (rs.next()) {
cbxRegistered.addItem(rs.getString("Plate_number"));
}
} catch (SQLException x) {
System.out.println("SQL Error while loading cars: " + x.getMessage());
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(RegisterCars.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(RegisterCars.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(RegisterCars.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(RegisterCars.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new RegisterCars().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btnClose;
private javax.swing.JButton btnDelete;
private javax.swing.JButton btnEdit;
private javax.swing.JButton btnSave;
private javax.swing.JButton btnShowCars;
private java.util.List<parkingSystem.Cars> carsList;
private javax.persistence.Query carsQuery;
private javax.swing.JComboBox cbxRegistered;
private javax.persistence.EntityManager entityManager;
private javax.swing.JDesktopPane jDesktopPane1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JLabel lblCar;
private javax.swing.JLabel lblClient;
private javax.swing.JLabel lblLogo;
private javax.swing.JLabel lblPlate;
private javax.swing.JLabel lblRegistered;
private javax.swing.JLabel lblSlot;
private javax.swing.JTextField txfColour;
private javax.swing.JTextField txfModel;
private javax.swing.JTextField txfPlate;
// End of variables declaration
}
----------获得以下输出--------
Exception in thread "AWT-EventQueue-0" Local Exception Stack:
Exception [EclipseLink-30005] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@42a57993
Internal Exception: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [parkingsystem?zeroDateTimeBehavior=convertToNullPU] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class javax.swing.JLabel] for the attribute [jLabel2] on the entity class [class parkingSystem.RegisterDepartments] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:127)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:107)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:177)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at parkingSystem.RegisterCars.initComponents(RegisterCars.java:54)
at parkingSystem.RegisterCars.<init>(RegisterCars.java:30)
at parkingSystem.loggedInAdmin.lblCarsMousePressed(loggedInAdmin.java:239)
at parkingSystem.loggedInAdmin.access$400(loggedInAdmin.java:14)
at parkingSystem.loggedInAdmin$5.mousePressed(loggedInAdmin.java:180)
at java.awt.Component.processMouseEvent(Component.java:6530)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4523)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
at java.awt.Container.dispatchEventImpl(Container.java:2281)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [parkingsystem?zeroDateTimeBehavior=convertToNullPU] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class javax.swing.JLabel] for the attribute [jLabel2] on the entity class [class parkingSystem.RegisterDepartments] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:1954)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1945)
at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:98)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:96)
... 39 more
Caused by: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [parkingsystem?zeroDateTimeBehavior=convertToNullPU] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class javax.swing.JLabel] for the attribute [jLabel2] on the entity class [class parkingSystem.RegisterDepartments] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:230)
... 43 more
Caused by: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class javax.swing.JLabel] for the attribute [jLabel2] on the entity class [class parkingSystem.RegisterDepartments] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.ValidationException.invalidTypeForSerializedAttribute(ValidationException.java:1139)
at org.eclipse.persistence.internal.jpa.metadata.converters.SerializedMetadata.process(SerializedMetadata.java:99)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processSerialized(MappingAccessor.java:1948)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingConverter(MappingAccessor.java:1775)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingValueConverter(MappingAccessor.java:1796)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.BasicAccessor.process(BasicAccessor.java:419)
at org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor.processMappingAccessors(MetadataDescriptor.java:1536)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processMappingAccessors(ClassAccessor.java:1648)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processMappingAccessors(EntityAccessor.java:1234)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.process(EntityAccessor.java:697)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processStage2(MetadataProject.java:1793)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:576)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:585)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1869)
... 41 more
Java Result: 1
答案 0 :(得分：0)
Exception Description: The type [class javax.swing.JLabel] for the attribute [jLabel2] on the entity class [class parkingSystem.RegisterDepartments] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
从异常堆栈跟踪中，我认为是类中的jLabel2 parkingSystem.RegisterDepartments.jLabel2您正在尝试序列化它。 哪个无效？。为什么要序列化JLabel？