essay.java

这是jsp网站开发死酷全书的代码

package cn.wanfeng.myblog.servlet;

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 cn.wanfeng.myblog.dao.*;
import cn.wanfeng.myblog.dto.*;
import cn.wanfeng.myblog.exceptions.*;
import cn.wanfeng.myblog.factory.*;

public class Essay extends HttpServlet {

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

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String Action=request.getParameter("action");
		//int ID=Integer.parseInt(request.getParameter("ID"));
		if (Action.equals("add")){
			String Subject=request.getParameter("subject");
			String Content=request.getParameter("content");
			cn.wanfeng.myblog.dto.Essay dto=new cn.wanfeng.myblog.dto.Essay();
			dto.createPk();
			dto.setSubject(Subject);
			dto.setContent(Content);
			EssayDao dao=EssayDaoFactory.create();
			try {
				dao.insert(dto);
			} catch (EssayDaoException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}else if (Action.equals("modify")){
			
		}
		RequestDispatcher requestDispatcher = this.getServletContext().getRequestDispatcher("/Success.jsp");
		requestDispatcher.forward(request, response);	
	}
	public void doGet(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		String Action=request.getParameter("action");
		int ID=Integer.parseInt(request.getParameter("ID"));
		if (Action.equals("remove")){
			EssayDao dao=EssayDaoFactory.create();
			EssayPk pk=new EssayPk(ID);
			try {
				dao.delete(pk);
			} catch (EssayDaoException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		RequestDispatcher requestDispatcher = this.getServletContext().getRequestDispatcher("/Success.jsp");
		requestDispatcher.forward(request, response);	
	}

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

}