studentcontroller.java

（JAVA环境

package train.basic.project.sm.controller;

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import train.basic.project.sm.dao.StudentDAO;
import train.basic.project.sm.model.Student;

public class StudentController extends HttpServlet {
	private static final long serialVersionUID = -1054273217679696815L;
	private StudentDAO studentDAO;

	@Override
	public void init() throws ServletException {
		super.init();
		studentDAO = new StudentDAO();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		String method = request.getParameter("method");
		if (method.equals("modify") || method.equals("add")) {
			Student st = new Student();
			int no = 0;
			try {
				no = Integer.parseInt(request.getParameter("no"));
			} catch (NumberFormatException e) {
				request.getRequestDispatcher("/numError.jsp").forward(request,
						response);
				return;
			}
			String name = request.getParameter("name");
			String phone = request.getParameter("phone");
			String mobile = request.getParameter("mobile");
			String address = request.getParameter("address");
			String cert = request.getParameter("cert");
			st.setAddress(address);
			st.setCert(cert);
			st.setMobile(mobile);
			st.setNo(no);
			st.setPhone(phone);
			st.setName(name);
			if (studentDAO.get(no) != null && "add".equals(method)) {
				request.getRequestDispatcher("/addError.jsp").forward(request,
						response);
				return;
			}
			studentDAO.saveOrUpdate(st);
		} else if (method.equals("listAll")) {
			;
		} else if (method.equals("del")) {
			int no = Integer.parseInt(request.getParameter("no"));
			studentDAO.delete(no);
		} else if (method.equals("modifyPage")) {
			int no = Integer.parseInt(request.getParameter("no"));
			Student stu = studentDAO.get(no);
			request.setAttribute("student", stu);
			RequestDispatcher dr = request.getRequestDispatcher("/mod.jsp");
			dr.forward(request, response);
			return;
		} else {
			RequestDispatcher dr = request.getRequestDispatcher("/error.jsp");
			dr.forward(request, response);
			return;
		}

		List<Student> students = studentDAO.queryAll();
		request.setAttribute("students", students);
		RequestDispatcher dr = request.getRequestDispatcher("/mainFrame.jsp");
		dr.forward(request, response);
	}

}