<分区>
我使用 java 和 mysql 以及 netbeans 制作了一个桌面学校管理系统应用程序。有 3 个 GUI 作为 ADMIN GUI、TEACHER GUI 和 STUDENT GUI。现在我想做的是，用户可以从不同的计算机实时访问 GUI。我的意思是，当管理员从管理员计算机访问系统时，同时教师可以通过教师 GUI 从任何其他计算机访问系统。这里所有的电脑都通过局域网网线连接。我怎样才能做到这一点..？请帮忙。 (附上代码)。
DB Connection Class(DBConnection.java):
import java.sql.DriverManager;
import com.mysql.jdbc.Connection;
public class DBConnection {
public static Connection dbconmethod() throws Exception{
Connection c;
Class.forName("com.mysql.jdbc.Driver");
c=(Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/ssdb","root","250");
return c;
}
}
Login JFrame Code(Login.java):
private void jBtn_LoginActionPerformed(java.awt.event.ActionEvent evt) {
if (txt_UserID.getText().equals("admin")&&txt_Password.getText().equals("123250")){
new AdminHome().setVisible(true);
AdminHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else if (txt_UserID.getText().equals("teacher")&&txt_Password.getText().equals("123250")){
new TeacherHome().setVisible(true);
TeacherHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else if (txt_UserID.getText().equals("student")&&txt_Password.getText().equals("123250")){
new StudentHome().setVisible(true);
StudentHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else{
String uid = txt_UserID.getText();
String pass = txt_Password.getText();
String s1 = "";
String sql = "SELECT status FROM admin_data WHERE user_id='"+uid+"' and password='"+pass+"' UNION SELECT user_role FROM tch_data WHERE user_id='"+uid+"' and password='"+pass+"' UNION SELECT user_role FROM stu_data WHERE user_id='"+uid+"' and password='"+pass+"'";
try {
java.sql.Connection c = DBConnection.dbconmethod();
Statement s=c.createStatement();
ResultSet rs= s.executeQuery(sql);
while (rs.next()){
s1 = rs.getString(1);
}if(s1.equalsIgnoreCase("Active")){
new AdminHome().setVisible(true);
AdminHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else if(s1.equalsIgnoreCase("PRINCIPAL")||s1.equalsIgnoreCase("D.PRINCIPAL")||s1.equalsIgnoreCase("V.PRINCIPAL")||s1.equalsIgnoreCase("TEACHER")){
new TeacherHome().setVisible(true);
TeacherHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else if(s1.equalsIgnoreCase("STUDENT")){
new StudentHome().setVisible(true);
StudentHome.txt_Log.setText(Login.txt_UserID.getText());
this.dispose();
}else {
UIManager.put("OptionPane.messageFont", new Font("Monospaced", Font.BOLD, 22));
JOptionPane.showMessageDialog(rootPane, "UserID or Password Incorrect, Re-check and try again!","Error",JOptionPane.ERROR_MESSAGE);
txt_UserID.setText(null);
txt_Password.setText(null);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}