我遇到了大学分配的问题，需要一些帮助。我们必须创建一个服务器-客户端程序，该程序具有一个带有基本表单的UI来输入数据，单击注册按钮后，该表单将创建StudentDetails类的对象并将其发送到服务器类。服务器类必须接收StudentDetails对象，并将该对象传递给toDatabase类。 toDatabase类必须接受StudentDetails对象，并将数据输入数据库中
我已经进行了数小时的研究，但我只能找出如何将对象从objectInputStream写入文件
StudentDetails类
public class StudentDetails implements Serializable{
private String studentID;
private String firstName;
private String lastName;
private String contactNum;
private String address;
//constructor
public StudentDetails(String studentID, String firstName, String lastName, String contactNum, String address) {
this.studentID = studentID;
this.firstName = firstName;
this.lastName = lastName;
this.contactNum = contactNum;
this.address = address;
}
//getter for studentID
public String getStudentID(){
return studentID;
}
//getter for firstName
public String getFirstName(){
return firstName;
}
//getter for lastName
public String getLastName(){
return lastName;
}
//getter for contactNum
public String getContactNum(){
return contactNum;
}
//getter for address
public String getAddress(){
return address;
}
}
客户端类
public class Client extends javax.swing.JPanel {
//declaring the GUI components
private javax.swing.JFrame jFrameMain;
private javax.swing.JPanel jPanelMain;
private javax.swing.JLabel lblStudentID;
private javax.swing.JLabel lblFirstName;
private javax.swing.JLabel lblLastName;
private javax.swing.JLabel lblContactNum;
private javax.swing.JLabel lblAddress;
private javax.swing.JTextField txfStudentID;
private javax.swing.JTextField txfFirstName;
private javax.swing.JTextField txfLastName;
private javax.swing.JTextField txfContactNum;
private javax.swing.JTextField txfAddress;
private javax.swing.JButton btnRegister;
GridLayout grid = new GridLayout(6, 2);
public Client() throws IOException{
createForm();
}
private void createForm() throws IOException{
jFrameMain = new javax.swing.JFrame();
jPanelMain = new javax.swing.JPanel();
txfStudentID = new javax.swing.JTextField();
txfFirstName = new javax.swing.JTextField();
txfLastName = new javax.swing.JTextField();
txfContactNum = new javax.swing.JTextField();
txfAddress = new javax.swing.JTextField();
lblStudentID = new javax.swing.JLabel();
lblFirstName = new javax.swing.JLabel();
lblLastName = new javax.swing.JLabel();
lblContactNum = new javax.swing.JLabel();
lblAddress = new javax.swing.JLabel();
btnRegister = new javax.swing.JButton();
//sets the panel to grid layout
jPanelMain.setLayout(grid);
//sets the lable text
lblStudentID.setText("Student ID:");
lblFirstName.setText("First Name:");
lblLastName.setText("Last Name:");
lblContactNum.setText("Contact Number:");
lblAddress.setText("Address:");
//sets the textfield text
txfStudentID.setText("");
txfFirstName.setText("");
txfLastName.setText("");
txfContactNum.setText("");
txfAddress.setText("");
//sets the button text
btnRegister.setText("Register");
//sets the JFrame size
jFrameMain.setSize(300, 250);
//sets the JFrames location
jFrameMain.setLocationRelativeTo(null);
//adds the panel to the frame
jFrameMain.add(jPanelMain);
//adds the first rows components
jPanelMain.add(lblStudentID);
jPanelMain.add(txfStudentID);
//adds the second rows components
jPanelMain.add(lblFirstName);
jPanelMain.add(txfFirstName);
//adds the third rows components
jPanelMain.add(lblLastName);
jPanelMain.add(txfLastName);
//adds the forth rows components
jPanelMain.add(lblContactNum);
jPanelMain.add(txfContactNum);
//adds the fifth rows components
jPanelMain.add(lblAddress);
jPanelMain.add(txfAddress);
//adds the last rows components
jPanelMain.add("", this);//leves the grid empty
jPanelMain.add(btnRegister);
//button action listener
btnRegister.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//vairiables to store the data from the textfield and trims the data
String studentID = txfStudentID.getText().trim();
String firstName = txfFirstName.getText().trim();
String lastName = txfLastName.getText().trim();
String contactNum = txfContactNum.getText().trim();
String address = txfAddress.getText().trim();
//if tests that the textfields cannot be empty
if(studentID.isEmpty()){
JOptionPane.showMessageDialog(jPanelMain, "Student ID cannot be empty");
}
else if(firstName.isEmpty()){
JOptionPane.showMessageDialog(jPanelMain, "First name cannot be empty");
}
else if(lastName.isEmpty()){
JOptionPane.showMessageDialog(jPanelMain, "Last Name cannot");
}
else if(contactNum.isEmpty()){
JOptionPane.showMessageDialog(jPanelMain, "Contact number cannot be empty");
}
else if(address.isEmpty()){
JOptionPane.showMessageDialog(jPanelMain, "Address cannot be empty");
}
else{
try{
//apptempt connection to server
Socket socket = new Socket("localhost",7777);
//Creates an output Stream
ObjectOutputStream toServer = new ObjectOutputStream(socket.getOutputStream());
//creates an object of the studentDetails
StudentDetails studentDetails = new StudentDetails(studentID, firstName, lastName, contactNum, address);
//sends the studentDetails object to the server
toServer.writeObject(studentDetails);
JOptionPane.showMessageDialog(jPanelMain, "Success");
}
catch (IOException exception){
JOptionPane.showMessageDialog(jPanelMain, "Failed to connect to server");
exception.printStackTrace();
}
}
}
});
//sets the Frame visible
jFrameMain.setVisible(true);
jFrameMain.setDefaultCloseOperation(jFrameMain.EXIT_ON_CLOSE);
}
public static void main(String[] args) throws IOException {
new Client();
}
}
服务器类
public class Server{
private ObjectOutputStream outputClient;
private ObjectInputStream inputClient;
private Object student;
public Server(){
try{
//create server socket
ServerSocket serverSocket = new ServerSocket(7777);
System.out.println("Server started");
outputClient = new ObjectOutputStream(new FileOutputStream("student.dat",true));
while(true){
//listens for any new connection request
Socket socket = serverSocket.accept();
//create an input stream from the socket
inputClient = new ObjectInputStream(socket.getInputStream());
}
}
//temporaily commented out catch
//catch(ClassNotFoundException classEx){
//classEx.printStackTrace();
//}
catch(IOException ex){
ex.printStackTrace();
}
}
public void toDatabase(){
try{
Class.forName("com.mysql.jdbc.Driver");
//database connection
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/pihe2019","root","");
//mysql insert statment
String query = " insert into details (studenID, firstName, lastName, contactNum, address)" + " values (?, ?, ?, ?, ?)";
//sql insert preparedstatment
PreparedStatement preparedStmt = con.prepareStatement(query);
preparedStmt.setString(1, "(StudenID from object DATA)");
preparedStmt.setString(2, "(firstName from object DATA)");
preparedStmt.setString(3, "(lastName from object DATA)");
preparedStmt.setString(4, "(contactNum from object DATA)");
preparedStmt.setString(5, "(address from object DATA)");
//excute the prepared statment
preparedStmt.execute();
con.close();
}catch(ClassNotFoundException clEx){
clEx.printStackTrace();
}
catch(SQLException sqlEx){
sqlEx.printStackTrace();
}
}
public static void main(String[] args) {
new Server();
}
}
我希望结果是插入数据库的数据