src/servlet/student/ExitCourseServlet.java

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package servlet.student;

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 ExitCourseServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ExitCourseServlet() {
		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 id = vd.getUnicode(request.getParameter("id"));
		InsertUpdateDelBean ib = new InsertUpdateDelBean();
		String sql ="delete from choice where id="+id;
		ib.insertANDupdateANDdel(sql);
		RequestDispatcher rd=request.getRequestDispatcher("/student/choice_course.jsp");
		rd.forward(request,response);
	}

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

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}