com.jsj.web=====新闻发布系统（10）

2020-05-15

这个有点像快递站点（快递应该有学我们计算机思想的）

接收快递，发送快递到客户手上

接收界面信息，发生到下一级

AdminServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.Admin;
 4 import com.jsj.factory.ServiceFactory;
 5 import com.jsj.service.AdminService;
 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 
15 //注解用于标注在一个继承了HttpServlet类之上，属于类级别的注解。
16 @WebServlet("/admin")
17 public class AdminServlet extends HttpServlet {
18 
19     //调用工厂类创建对象
20     //括号是强制转换
21     private AdminService adminService = (AdminService) ServiceFactory.getService("AdminService");
22 
23     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
24         response.setContentType("text/html;charset=UTF-8");
25         try(PrintWriter out = response.getWriter()){
26             /*
27             getParameter:它是一种取参数的方法。把jsp文件中的数据读取到出来。然后就可以封装利用起来
28              */
29             String username = request.getParameter("username");
30             String password = request.getParameter("password");
31 
32             //调用service层的login方法
33             Admin admin = adminService.login(username,password);
34 
35             if (admin.getId()!=null){
36 
37                 request.getSession().setAttribute("adminStatus",true);
38                 request.getSession().setAttribute("admin",admin);
39                 out.println("登录成功，3秒后跳转到管理中心！如果没有跳转请点<a href='/admin/manage'>这里</a>");
40                 response.setHeader("refresh", "2;url=/admin/manage");
41             }else {
42                 out.println("用户名或密码错误，请<a href='/admin'>重试</a>");
43                 // 二秒跳到其他页面 response.setHeader("refresh","2;URL=otherPagename");
44                 response.setHeader("refresh", "2;url=/admin");
45             }
46         }
47     }
48 
49     @Override
50     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
51         request.getRequestDispatcher("/WEB-INF/view/admin/login.jsp").forward(request,response);
52     }
53 }

View Code

IndexServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.NewsCateVo;
 4 import com.jsj.entity.NewsCate;
 5 import com.jsj.factory.ServiceFactory;
 6 import com.jsj.service.NewsCateService;
 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.util.List;
15 
16 @WebServlet("/index")
17 public class IndexServlet 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         List<NewsCateVo> allNewsCateVo = newsCateService.getAllNewsCateVo(5);
25         request.setAttribute("allNewsCateVo", allNewsCateVo);
26         request.getRequestDispatcher("/WEB-INF/view/index.jsp").forward(request,response);
27     }
28 
29 }

View Code

LoginServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.User;
 4 import com.jsj.factory.ServiceFactory;
 5 import com.jsj.service.UserService;
 6 
 7 import javax.servlet.ServletException;
 8 import javax.servlet.annotation.WebServlet;
 9 import javax.servlet.http.Cookie;
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("/login")
17 public class LoginServlet extends HttpServlet {
18     //通过ServiceFactory工厂生产UserService对象
19     private UserService userService = (UserService) ServiceFactory.getService("UserService");
20 
21     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
22         //设置编码方式，中文不会出现乱码
23         response.setContentType("text/html;charset=UTF-8");
24 
25         try(PrintWriter out = response.getWriter()){
26             //获取login.jsp界面的用户名和密码
27             String username = request.getParameter("username");
28             String password = request.getParameter("password");
29 
30 
31             //通过调用login方法查询账号密码，返回对象
32             User user = userService.login(username,password);
33             //如果账号密码正确的话，id就不为空
34             if (user.getId()!=null){
35                 //判断是否有点 记住我这个
36                 if (request.getParameter("remember")!=null){
37                     //创建cookie对象，参数分别代表 cookie名称 和 值
38                     Cookie usernameCookie = new Cookie("rememberUsername",username);
39                     //是设置cookie最大保存时间
40                     usernameCookie.setMaxAge(7*24*60*60);
41                     //创建cookie对象，参数分别代表 cookie名称 和 值
42                     Cookie passwordCookie = new Cookie("rememberPassword",password);
43                     //是设置cookie最大保存时间
44                     passwordCookie.setMaxAge(7*24*60*60);
45                     //添加cookie到服务百器端。可以使用抓包工具查看到，然后服务器给浏览器返回set-cookie键值对
46                     response.addCookie(usernameCookie);
47                     response.addCookie(passwordCookie);
48                 }
49                 //这个登录成功后跳到index.jsp(主界面）
50                 out.println("登录成功，3秒后跳转到首页！如果没有跳转请点<a href='/'>这里</a>");
51                 //参数表示 session的名称 和 值（对象）
52                 request.getSession().setAttribute("userStatus",true);
53                 request.getSession().setAttribute("user",user);
54                 //设置表头，刷新
55                 response.setHeader("refresh", "2;url=/");
56             }else {
57                 out.println("用户名或密码错误，请<a href='/login'>重试</a>");
58                 response.setHeader("refresh", "2;url=/login");
59             }
60         }
61     }
62 
63     @Override
64     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
65         Cookie[] cookies = request.getCookies();
66         //这个是判断记住密码时
67         for (Cookie cookie:cookies) {
68             //这是获得账号
69             if (cookie.getName().equals("rememberUsername")){
70                 request.setAttribute("rememberUsername",cookie.getValue());
71             }
72             //这是获得密码
73             if (cookie.getName().equals("rememberPassword")){
74                 request.setAttribute("rememberPassword",cookie.getValue());
75             }
76         }
77         //重定向，将账号密码传过去
78         request.getRequestDispatcher("/WEB-INF/view/login.jsp").forward(request,response);
79     }
80 }

View Code

LogoutServlet

 1 package com.jsj.web;
 2 
 3 import javax.servlet.annotation.WebServlet;
 4 import javax.servlet.http.HttpServlet;
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 import java.io.IOException;
 8 
 9 @WebServlet("/logout")
10 public class LogoutServlet extends HttpServlet {
11 
12     @Override
13     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
14         //
15         response.setContentType("text/html;charset=UTF-8");
16         if (request.getSession().getAttribute("user")!=null){
17             request.getSession().removeAttribute("userStatus");
18             request.getSession().removeAttribute("user");
19         }
20         if (request.getSession().getAttribute("admin")!=null){
21             request.getSession().removeAttribute("adminStatus");
22             request.getSession().removeAttribute("admin");
23         }
24         response.getWriter().println("注销成功，3秒后跳转到首页！如果没有跳转请点<a href='/'>这里</a>");
25         response.setHeader("refresh", "2;url=/");
26     }
27 }

View Code

NewsCateServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.News;
 4 import com.jsj.entity.NewsCate;
 5 import com.jsj.entity.Page;
 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.util.List;
17 
18 @WebServlet("/newsCate")
19 public class NewsCateServlet extends HttpServlet {
20 
21     private NewsService newsService = (NewsService) ServiceFactory.getService("NewsService");
22 
23     private NewsCateService newsCateService = (NewsCateService) ServiceFactory.getService("NewsCateService");
24 
25     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
26         try {
27             int cateId = Integer.valueOf(request.getParameter("cateId"));
28             NewsCate newsCate = newsCateService.getNewsCateById(cateId);
29             if (newsCate == null){
30                 request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
31             }else {
32                 int pageIndex = request.getParameter("pageIndex") == null ? 1 : Integer.valueOf(request.getParameter("pageIndex"));
33                 int pageSize = 10;
34                 Page<News> newsPage = newsService.getNewsPageByCate(cateId,pageIndex,pageSize);
35                 if (newsPage.getBeanList() == null || newsPage.getBeanList().size() == 0){
36                     request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
37                 }
38                 request.setAttribute("newsPage", newsPage);
39                 request.setAttribute("cate",newsCate);
40                 List<NewsCate> allCate = newsCateService.getAllCate();
41                 request.setAttribute("allCate",allCate);
42                 request.getRequestDispatcher("/WEB-INF/view/newsCate.jsp").forward(request,response);
43             }
44         }catch (Exception e){
45             request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
46         }
47 
48     }
49 }

View Code

NewsServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.News;
 4 import com.jsj.entity.NewsCate;
 5 import com.jsj.factory.ServiceFactory;
 6 import com.jsj.service.NewsCateService;
 7 import com.jsj.service.NewsService;
 8 
 9 import javax.servlet.ServletException;
10 import javax.servlet.annotation.WebServlet;
11 import javax.servlet.http.HttpServlet;
12 import javax.servlet.http.HttpServletRequest;
13 import javax.servlet.http.HttpServletResponse;
14 import java.io.IOException;
15 import java.util.List;
16 
17 @WebServlet("/news")
18 public class NewsServlet extends HttpServlet {
19 
20     private NewsService newsService = (NewsService) ServiceFactory.getService("NewsService");
21 
22     private NewsCateService newsCateService = (NewsCateService) ServiceFactory.getService("NewsCateService");
23 
24     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
25         try {
26             int newsId = Integer.valueOf(request.getParameter("newsId"));
27             News news = newsService.getNewsById(newsId);
28             if (news == null){
29                 request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
30             }else {
31                 request.setAttribute("news",news);
32                 List<NewsCate> allCate = newsCateService.getAllCate();
33                 request.setAttribute("allCate",allCate);
34                 request.getRequestDispatcher("/WEB-INF/view/news.jsp").forward(request,response);
35             }
36         }catch (Exception e){
37             request.getRequestDispatcher("/WEB-INF/view/error/error.jsp").forward(request, response);
38         }
39 
40     }
41 }

View Code

RegisisterServlet

 1 package com.jsj.web;
 2 
 3 import com.jsj.entity.User;
 4 import com.jsj.factory.ServiceFactory;
 5 import com.jsj.service.UserService;
 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.text.DateFormat;
15 import java.text.ParseException;
16 import java.text.SimpleDateFormat;
17 
18 @WebServlet("/register")
19 public class RegisterServlet extends HttpServlet {
20 
21     private UserService userService = (UserService) ServiceFactory.getService("UserService");
22 
23     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
24         //告诉你我是用utf -8编码的
25         response.setContentType("text/html;charset=UTF-8");
26 
27         try(PrintWriter out = response.getWriter()){
28             //创建实体对象
29             User user = new User();
30             //获取用户名加密码
31             user.setUsername(request.getParameter("username"));
32             user.setPassword(request.getParameter("password"));
33             //日期格式化
34             DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
35             try {
36                 //获取生日日期
37                 user.setBirthday(dateFormat.parse(request.getParameter("birthday")));
38             } catch (ParseException ignored) {}
39             //获取邮箱
40             user.setEmail(request.getParameter("email"));
41             //获取手机号
42             user.setTelNumber(request.getParameter("telNumber"));
43 
44             int res = userService.register(user);
45 
46             if (res>0){
47                 out.println("注册成功，3秒后跳转到首页！或现在去<a href='/login'>登录</a>");
48                 response.setHeader("refresh", "2;url=/");
49             }else {
50                 out.println("注册失败!请<a href='/register'>重试</a>重试");
51                 response.setHeader("refresh", "2;url=/register");
52             }
53         }
54     }
55 
56     @Override
57     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
58         request.getRequestDispatcher("/WEB-INF/view/register.jsp").forward(request,response);
59     }
60 }

View Code

会当凌绝顶，一览众山小

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原文地址：https://www.cnblogs.com/quenvpengyou/p/12896515.html