用JSP实现网页收藏实例源码

package com.michael.servlet; import java.io.IOException; 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.michael.dao.LinkDao; import com.michael.dao.impl.LinkDaoImpl; import com.michael.vo.Link; public class LinkServlet extends HttpServlet { /** * Constructor of the object. */ public LinkServlet() { 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 { doPost(request,response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String methodName = request.getParameter("methodName"); if (methodName != null && methodName.equals("add")) { add(request, response); } else if (methodName != null && methodName.equals("delete")) { delete(request, response); } else if (methodName != null && methodName.equals("forward")) { forward(request, response); } else if (methodName != null && methodName.equals("update")) { update(request, response); } else { return; } /* //响应用户请求 String name = request.getParameter("name"); String url = request.getParameter("url"); //调用后台逻辑 LinkDao dao = new LinkDaoImpl(); Link l = new Link(); l.setName(name); l.setUrl(url); dao.add(l); List list = dao.list(); request.setAttribute("LinkList", list); //转发 request.getRequestDispatcher("/link.jsp").forward(request, response); */ } public void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //响应用户请求 String name = request.getParameter("name"); String url = request.getParameter("url"); //调用后台逻辑 LinkDao dao = new LinkDaoImpl(); Link l = new Link(); l.setName(name); l.setUrl(url); dao.add(l); response.sendRedirect("/favorites/link.jsp"); } /*public void query(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //调用后台逻辑 //LinkDao dao = new LinkDaoImpl(); //List list = dao.list(); //request.setAttribute("LinkList", list); //转发 request.getRequestDispatcher("/link.jsp").forward(request, response); } */ public void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //调用后台逻辑 LinkDao dao = new LinkDaoImpl(); String[] ids = request.getParameterValues("ids"); dao.delete(ids); response.sendRedirect("/favorites/link.jsp"); } public void forward(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //调用后台逻辑 String id = request.getParameter("id"); LinkDao dao = new LinkDaoImpl(); Link link = dao.get(Integer.parseInt(id)); request.setAttribute("link", link); request.getRequestDispatcher("/editlink.jsp").forward(request, response); } public void update(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //响应用户请求 String id = request.getParameter("id"); String name = request.getParameter("name"); String url = request.getParameter("url"); //调用后台逻辑 LinkDao dao = new LinkDaoImpl(); Link l = new Link(); l.setId(Integer.parseInt(id)); l.setName(name); l.setUrl(url); dao.update(l); response.sendRedirect("/favorites/link.jsp"); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } public void service() throws ServletException{ } }