updatesaying.java

具备留言的功能

package j2ee.pj.servlet;

import j2ee.pj.dao.SayingDao;
import j2ee.pj.javabean.SayingBean;

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

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

public class UpdateSaying extends HttpServlet {

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

	this.doPost(request, response);
	}

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

		response.setContentType("text/html;charset=utf-8");
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		String ssid=null;
		//HttpSession session=request.getSession();
	//	ssid=(String)session.getAttribute("ssid1");
		ssid=request.getParameter("ssid");
		String id=request.getParameter("sid");
		int sid=0;
		SayingBean saying=new SayingBean();;
		if(ssid==null){
			if(id!=null||id!=""){
				sid=Integer.parseInt(id);
			}
			SayingDao sd=new SayingDao();
			saying=sd.getOneSaying(sid);
			request.setAttribute("saying", saying);
			request.getRequestDispatcher("updatesaying.jsp").forward(request, response);
		}
		else if(ssid!=null){
			int uid=0;
			uid=Integer.parseInt(ssid);
			saying.setSid(uid);
			saying.setStitle(request.getParameter("stitle"));
			saying.setSauthor(request.getParameter("sauthor"));
			saying.setScontent(request.getParameter("scontent"));
			SayingDao sd=new SayingDao();
			if(sd.updateSaying(saying)){
				response.sendRedirect("QuerySaying");
			}else{
				response.sendRedirect("updatesaying.jsp");
			}
		}
	}

}