com.jsj.web.manage====新闻发布系统（11）

2020-05-15

这个是管理员的Servlet

ManageServlet

 1 package com.jsj.web.manage;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.annotation.WebServlet;
 5 import javax.servlet.http.HttpServlet;
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 import java.io.IOException;
 9 
10 @WebServlet("/admin/manage")
11 public class ManageServlet extends HttpServlet {
12 
13     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
14         request.getRequestDispatcher("/WEB-INF/view/admin/manage/index.jsp").forward(request,response);
15     }
16 }
View Code

NewsCateServlet

 1 package com.jsj.web.manage;
 2 
 3 import com.jsj.entity.NewsCate;
 4 import com.jsj.factory.ServiceFactory;
 5 import com.jsj.service.NewsCateService;
 6 
 7 import javax.servlet.ServletException;
 8 import javax.servlet.annotation.WebServlet;
 9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12 import java.io.IOException;
13 import java.io.PrintWriter;
14 import java.util.List;
15 
16 @WebServlet("/admin/manage/newsCate")
17 public class NewsCateServlet extends HttpServlet {
18 
19     private NewsCateService newsCateService = (NewsCateService) ServiceFactory.getService("NewsCateService");
20 
21     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
22         List<NewsCate> allCate = newsCateService.getAllCate();
23         request.setAttribute("allCate",allCate);
24         request.getRequestDispatcher("/WEB-INF/view/admin/manage/newsCate.jsp").forward(request,response);
25     }
26 
27     @Override
28     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
29         response.setContentType("text/html;charset=UTF-8");
30         try(PrintWriter out = response.getWriter()){
31             if (request.getParameter("method")!=null&&request.getParameter("method").equals("insert")){
32                 //新增分类
33                 insert(request,out);
34             }else if (request.getParameter("name")!=null){
35                 //修改分类
36                 update(request,out);
37             }else {
38                 //删除分类
39                 delete(request, out);
40             }
41             response.setHeader("refresh", "2;url=/admin/manage/newsCate");
42         }
43     }
44 
45     /**
46      * 添加分类
47      */
48     private void insert(HttpServletRequest request,PrintWriter out) {
49         String name = request.getParameter("name");
50         NewsCate newsCate = new NewsCate();
51         newsCate.setName(name);
52         int res = newsCateService.insert(newsCate);
53         if (res>0){
54             out.println("添加成功");
55         }else {
56             out.println("添加失败");
57         }
58     }
59 
60     /**
61      * 删除分类
62      */
63     private void delete(HttpServletRequest request, PrintWriter out) {
64         Integer id = Integer.valueOf(request.getParameter("id"));
65         int res = newsCateService.delete(id);
66         if (res>0){
67             out.println("删除成功");
68         }else {
69             out.println("添加失败");
70         }
71     }
72 
73     /**
74      * 修改分类
75      */
76     private void update(HttpServletRequest request,PrintWriter out) {
77         String name = request.getParameter("name");
78         Integer id = Integer.valueOf(request.getParameter("id"));
79         NewsCate newsCate = new NewsCate();
80         newsCate.setId(id);
81         newsCate.setName(name);
82         int res = newsCateService.update(newsCate);
83         if (res>0){
84             out.println("修改成功");
85         }else {
86             out.println("修改失败");
87         }
88     }
89 
90 }
View Code

NewsServlet

 1 package com.jsj.web.manage;
 2 
 3 import com.jsj.entity.NewsVo;
 4 import com.jsj.entity.Page;
 5 import com.jsj.factory.ServiceFactory;
 6 import com.jsj.service.NewsService;
 7 
 8 import javax.servlet.ServletException;
 9 import javax.servlet.annotation.WebServlet;
10 import javax.servlet.http.HttpServlet;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13 import java.io.IOException;
14 import java.io.PrintWriter;
15 
16 @WebServlet("/admin/manage/news")
17 public class NewsServlet extends HttpServlet {
18 
19     private NewsService newsService = (NewsService) ServiceFactory.getService("NewsService");
20 
21     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
22         try{
23             int pageIndex = request.getParameter("pageIndex") == null ? 1 : Integer.valueOf(request.getParameter("pageIndex"));
24             int pageSize = 10;
25             Page<NewsVo> newsVoPage = newsService.getNewsVoPage(pageIndex,pageSize);
26             if (newsVoPage.getBeanList() == null || newsVoPage.getBeanList().size() == 0){
27                 request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
28             }else {
29                 request.setAttribute("newsVoPage", newsVoPage);
30                 request.getRequestDispatcher("/WEB-INF/view/admin/manage/news.jsp").forward(request,response);
31             }
32         }catch (Exception e){
33             request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
34         }
35 
36     }
37 
38     /**
39      * 删除新闻文章
40      */
41     @Override
42     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
43         response.setContentType("text/html;charset=UTF-8");
44         try(PrintWriter out = response.getWriter()){
45             Integer id = Integer.valueOf(request.getParameter("id"));
46             int res = newsService.deleteNewsById(id);
47             if (res>0){
48                 out.println("新闻删除成功");
49             }else {
50                 out.println("新闻删除失败");
51             }
52             response.setHeader("refresh", "2;url=/admin/manage/news");
53         }
54     }
55 
56 
57 }
View Code

PublishNewsServlet

 1 package com.jsj.web.manage;
 2 
 3 import com.jsj.entity.Admin;
 4 import com.jsj.entity.News;
 5 import com.jsj.entity.NewsCate;
 6 import com.jsj.factory.ServiceFactory;
 7 import com.jsj.service.NewsCateService;
 8 import com.jsj.service.NewsService;
 9 
10 import javax.servlet.ServletException;
11 import javax.servlet.annotation.WebServlet;
12 import javax.servlet.http.HttpServlet;
13 import javax.servlet.http.HttpServletRequest;
14 import javax.servlet.http.HttpServletResponse;
15 import java.io.IOException;
16 import java.io.PrintWriter;
17 import java.util.Date;
18 import java.util.List;
19 
20 @WebServlet("/admin/manage/publish")
21 public class PublishNewsServlet extends HttpServlet {
22 
23     private NewsCateService newsCateService = (NewsCateService) ServiceFactory.getService("NewsCateService");
24 
25     private NewsService newsService = (NewsService) ServiceFactory.getService("NewsService");
26 
27     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
28         List<NewsCate> allCate = newsCateService.getAllCate();
29         request.setAttribute("allCate",allCate);
30         request.getRequestDispatcher("/WEB-INF/view/admin/manage/publish.jsp").forward(request,response);
31     }
32 
33     /**
34      * 发表文章
35      */
36     @Override
37     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
38         response.setContentType("text/html;charset=UTF-8");
39         try(PrintWriter out = response.getWriter()){
40 
41             Admin admin = (Admin) request.getSession().getAttribute("admin");
42             News news = new News();
43             //获取新闻的标题
44             news.setTitle(request.getParameter("title"));
45             //获取作者的信息
46             news.setAuthor(admin.getUsername());
47             //获取cateid，转换类型为int形
48             news.setCateId(Integer.valueOf(request.getParameter("cate")));
49             //new Date()会将当前时间设置为初始值
50             news.setTime(new Date());
51             //获取新闻内容
52             news.setContent(request.getParameter("content"));
53             //res是个标记，主要是用来表示是否成功
54             int res = newsService.publish(news);
55 
56             if (res>0){
57                 out.println("新闻发表成功");
58             }else {
59                 out.println("新闻发表失败");
60             }
61             response.setHeader("refresh", "2;url=/admin/manage");
62         }
63     }
64 
65 }
View Code
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原文地址：https://www.cnblogs.com/quenvpengyou/p/12896542.html