selectfollowbyuseridservlet.java

一个仿造淘宝的jsp网站。功能比较完善

package com.jc.taobao.gjj.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

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

import com.jc.taobao.gjj.entity.UserInfo;
import com.jc.taobao.gjj.logic.FollowNoteBean;
import com.jc.taobao.gjj.logic.UserInfoBean;

public class SelectFollowbyuseridServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public SelectFollowbyuseridServlet() {
		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 {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		
		String username=request.getParameter("selectfollowbyuserid");
		UserInfo user=new UserInfo();
		UserInfoBean ubean=new UserInfoBean();
		FollowNoteBean fbean=new FollowNoteBean();
		user.setUsername(username);
		ArrayList aluser=(ArrayList)ubean.getquerybyuserusename(user);
		if(aluser.isEmpty())
		{
			out.print("<script>alert('对不起，没有帖子!');window.history.go(-1);</script>");
		}
		else
		{
		UserInfo userinfo=(UserInfo)aluser.get(0); 
		ArrayList alfollownotebyother=fbean.getqueryFollowbyuserId(Integer.valueOf(userinfo.getUserid()));
		  if(alfollownotebyother.isEmpty())
		  {
			  out.print("<script>alert('对不起，没有帖子!');window.history.go(-1);</script>"); 
		  }
		request.setAttribute("alfollownotebyother", alfollownotebyother);
		request.getRequestDispatcher("/FollowMasterManager.jsp").forward(request, response);
		}
	}

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

}