【Java开源代码栏目提醒】:文章导读:在新的一年中,各位网友都进入紧张的学习或是工作阶段。网学会员整理了Java开源代码-CategoryAdmin.java的相关内容供大家参考,祝大家在新的一年里工作和学习顺利!
package Servlets;
import java.io.IOException;
import java.util.Collection;
import utils.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import ado.CategoryAdo;
public class CategoryAdmin extends HttpServlet {
/**
* Constructor of the object.
*/
public CategoryAdmin() {
super();
}
/**
* 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 {
String action = request.getParameter("action");
if(action.equals("1")){
try {
int delete = ParamUtils.getIntParameter(request, "delete", 0);
CategoryAdo cado = new CategoryAdo();
cado.deleteCategoryByID(delete);
cado.close();
getCategories(request,response);
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=删除成功!")
.forward(request,response);
}
catch(Exception e){
getCategories(request,response);
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=删除失败!")
.forward(request,response);
}
}
else if(action.equals("2")){
try{
String categoryName = HtmlUtils.escapeHtml(ParamUtils.getParameter(request,"categoryName"));
String description = HtmlUtils.escapeHtml(ParamUtils.getParameter(request,"description"));
description = HtmlUtils.convertNewlines(description);
CategoryAdo cado = new CategoryAdo();
cado.addCategory(ChineseUtils.transToEn(categoryName),ChineseUtils.transToEn(description));
cado.close();
getCategories(request,response);
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=添加成功!")
.forward(request,response);
}
catch(Exception e){
getCategories(request,response);
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=添加失败!")
.forward(request,response);
}
}
else if (action.equals("0")) {
getCategories(request,response);
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=所有种类")
.forward(request, response);
}
else if(action.equals("3")){
HttpSession session = request.getSession();
if(session.getAttribute("user")==null){
request.getRequestDispatcher("/error.jsp?msg=请先登录")
.forward(request, response);
return ;
}
getCategories(request,response);
request.getRequestDispatcher("/sell.jsp")
.forward(request, response);
}
}
public void getCategories(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException {
try{
CategoryAdo cado = new CategoryAdo();
Collection categories = cado.selectCategories();
request.setAttribute("categories",categories);
cado.close();
}
catch(Exception e){
request.getRequestDispatcher("/admin/categoryAdmin.jsp?msg=无法读取种类!")
.forward(request,response);
}
}
}
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