如何将Servlet封装技术改写为支持长尾关键词的？

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Servlet的封装：导入必要的类，包括IOException、InvocationTargetException、Method、List、ServletException和@WebServlet。

Servlet的封装

import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.jxnd.bean.Users; import org.jxnd.biz.IUsersBiz; import org.jxnd.biz.impl.RolesBiz; import org.jxnd.biz.impl.UsersBiz; import org.jxnd.tools.Tools; @WebServlet("/UsersServlet") @SuppressWarnings("all") public class UsersServlet extends HttpServlet { IUsersBiz biz=new UsersBiz(); Class c=UsersServlet.class; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String type=request.getParameter("type"); for (Method mt: c.getDeclaredMethods()) { if (mt.getName().equalsIgnoreCase(type)) { try { mt.invoke(this, request,response); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } } } private void updateUsersById(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id=Integer.parseInt(request.getParameter("roleid")); request.setAttribute("info", biz.getUsersById(id)); request.setAttribute("list", new RolesBiz().getRolesAll()); request.getRequestDispatcher("update.jsp").forward(request, response); } private void doUpdate(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Users info=new Users(); String name=request.getParameter("name"); String pass=request.getParameter("pass"); int roleid=Integer.parseInt(request.getParameter("rid")); info.setName(name); info.setPass(pass); info.setRoleid(roleid); if(biz.updateUsers(info)<1) request.setAttribute("error", "修改失败,请联系管理员"); //request.getRequestDispatcher("GetUsersPage").forward(request, response); getUsersPage(request, response); } private void updatePwd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Users info=(Users) request.getSession().getAttribute("info"); String name=info.getName(); String op=request.getParameter("op"); String np=request.getParameter("np1"); String msg=""; int i=biz.updatePwd(name, op, np); if (i==3){ info.setPass(np); request.getSession().setAttribute("info", info); response.sendRedirect("UsersServlet?type=getUsersPage&pageIndex=1"); return; }if (i==1) msg="原始密码错误"; if(i==2) msg="服务器错误"; request.setAttribute("errormsg", msg); request.getRequestDispatcher("updatepwd.jsp").forward(request, response); } private void getUsersPage(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int pageIndex=Integer.parseInt(request.getParameter("pageIndex")); int pageSize=Integer.parseInt(request.getParameter("pageSize")==null?"10":request.getParameter("pageSize")); int count=biz.getUsersCount(); List list=biz.getUsersPage(pageIndex, pageSize); request.setAttribute("list", list); request.setAttribute("pageIndex", pageIndex); request.setAttribute("pageSize", pageSize); request.setAttribute("count",count); request.setAttribute("pageMsg", Tools.paging(count, pageSize, pageIndex, "UsersServlet?type=getUsersPage")); request.getRequestDispatcher("manager.jsp").forward(request, response); } private void deleteUsersById(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id=Integer.parseInt(request.getParameter("roleid")); if (biz.deleteUsersById(id)>0) //request.getRequestDispatcher("GetUsersPage").forward(request, response); getUsersPage(request, response); else{ request.setAttribute("msg", "删除失败,请联系管理员!"); getUsersPage(request, response); //request.getRequestDispatcher("GetUsersAll").forward(request, response); } } public void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ String name=request.getParameter("name"); String pass=request.getParameter("pass"); //基本验证 if (name!=null&&!"".equals(name)&&pass!=null&&!"".equals(pass)) { //内容验证 (过滤特殊字符,脏数据) 此处省略部分代码 Users info= biz.login(name, pass); if (info!=null) { request.getSession().setAttribute("info", info); response.sendRedirect("UsersServlet?type=GetUsersPage&pageIndex=1&pageSize=10"); }else { request.setAttribute("msg", "用户名或者密码错误!"); request.getRequestDispatcher("login.jsp").forward(request, response); } } } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }