java实现响应式布局爬虫技术

package com.alioth.spider.servlet; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSONArray; import com.alioth.spider.entity.Image; import com.alioth.spider.util.SpiderUtil; public class LoadImagesServlet extends HttpServlet { /** * Constructor of the object. */ public LoadImagesServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @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 doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } /** * 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 { //获取传入的页码和类型 String pageNum = request.getParameter("pagenum"); String category = request.getParameter("category"); List<Image> images = SpiderUtil.queryImageList(category, pageNum); response.setContentType("text/html;charset=utf-8"); //从response中获取输出流 PrintWriter out = response.getWriter(); //进行json字符串格式转换 out.print(JSONArray.toJSONString(images,true)); out.flush(); out.close(); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }