src/servlet/teacher/AnewAddServlet.java

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package servlet.teacher;

import java.io.IOException;
import java.io.PrintWriter;

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

import util.Validate;
import bean.InsertUpdateDelBean;

public class AnewAddServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public AnewAddServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		Validate vd = new Validate();
		String students = vd.getUnicode(request.getParameter("students"));
		String grade = vd.getUnicode(request.getParameter("grade"));
		String course = vd.getUnicode(request.getParameter("course"));
		String mark = vd.getUnicode(request.getParameter("mark"));

		String str = "";
		int tem = vd.getInt(mark);
		if(tem == -1){
			str = "/teacher/anew_add.jsp";
			request.setAttribute("markError", "1");
		}else{
			InsertUpdateDelBean ib = new InsertUpdateDelBean();
			String sql = "update anew set mark="+mark+",grade='"+grade+"' where student='"+students+"' and course='"+course+"'";
			ib.insertANDupdateANDdel(sql);
			str = "/teacher/mark_list.jsp";
			request.setAttribute("ok", "1");
		}
		
		RequestDispatcher rd=request.getRequestDispatcher(str);
		rd.forward(request,response);
	}

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