src/main/java/controller/EditStudentServlet.java - dev7 - ihaverak/persons

src/main/java/controller/EditStudentServlet.java
65 строк3 KB
ihaverak
лаба 7
23 май 2026, 01:19
23 май 2026, 01:19e0b7bac
package controller;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
import domain.Group;
import domain.Student;
import exception.DAOException;
import dao.GroupDbDAO;
import dao.StudentDbDAO;

@WebServlet("/editstudent")
public class EditStudentServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
            throws ServletException, IOException {
        try {
            StudentDbDAO dao = new StudentDbDAO();
            GroupDbDAO groupDao = new GroupDbDAO();
            
            List<Student> students = dao.findAll();
            List<Group> groups = groupDao.findAll();
            request.setAttribute("students", students);
            request.setAttribute("groups", groups);
            
            String idStr = request.getParameter("id");
            if (idStr != null) {
                Long id = Long.parseLong(idStr);
                Student student = dao.findById(id);
                request.setAttribute("studentEdit", student);
            }
        } catch (DAOException e) {
            e.printStackTrace();
        }
        request.getRequestDispatcher("/views/editstudent.jsp").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) 
            throws ServletException, IOException {
        try {
            StudentDbDAO dao = new StudentDbDAO();
            
            Long id = Long.parseLong(request.getParameter("id"));
            String firstName = request.getParameter("firstname");
            String lastName = request.getParameter("lastname");
            String phone = request.getParameter("phone");
            String email = request.getParameter("email");
            Long groupId = Long.parseLong(request.getParameter("groupId"));
            
            GroupDbDAO groupDao = new GroupDbDAO();
            Group group = groupDao.findById(groupId);
            
            Student student = new Student(id, firstName, lastName, phone, email, groupId, group);
            dao.update(student);
        } catch (DAOException e) {
            e.printStackTrace();
        }
        response.sendRedirect(request.getContextPath() + "/student");
    }
}