新聞發佈系統

時間 2019-11-08

標籤發佈系統简体版

原文原文鏈接

先來一個分層架構圖：html

WeebRoot目錄下的頁面：java

如今，此項目以實現登陸，註銷，新聞列表，編輯主題》》》》sql

先來登陸部分的關鍵代碼apache

index.jsp中的代碼服務器

userInfoServlet中的所有代碼：架構

　TopicServlet中的代碼jsp

package cn.news.Servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.news.dao.impl.TopicDAOImpl;
import cn.news.entity.Topic;
import cn.news.service.ITopicService;
import cn.news.service.impl.TopicServiceImpl;

public class TopicServlet extends HttpServlet {

    
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //調度Topic的service
        ITopicService service=new TopicServiceImpl();
        try {
            List<Topic> list=service.getAllTopic();
            request.setAttribute("topiclist", list);
            //System.out.println(list.size());
            //轉發到列表頁
            request.getRequestDispatcher("/newspages/topic_list.jsp").forward(request, response);
        } catch (SQLException e) {
            
        }
    }

}

topic_list中的代碼post

 
         <%@ page language= 
         "java"  
         import 
         = 
         "java.util.*"  
         pageEncoding= 
         "UTF-8" 
         %> 
        
         <% 
        
         String path = request.getContextPath(); 
        
         String basePath = request.getScheme()+ 
         "://" 
         +request.getServerName()+ 
         ":" 
         +request.getServerPort()+path+ 
         "/" 
         ; 
        
         %> 
        
         <!DOCTYPE HTML PUBLIC  
         "-//W3C//DTD HTML 4.01 Transitional//EN" 
         > 
        
         <html> 
        
         <head> 
        
         <base href= 
         "<%=basePath%>" 
         > 
        
         </head> 
        
         <body> 
        
         <%=path %> 
        
         <form enctype= 
         "multipart/form-data"  
         action= 
         "<%=path %>/test.jsp"  
         method= 
         "post" 
         > 
        
         姓       名： <input name= 
         "username" 
         /> 
        
         選擇文件：<input type= 
         "file"  
         name= 
         "myfile"  
         /> 
        
         <input type= 
         "submit"  
         value= 
         "上傳" 
         />  
        
         </form> 
        
         </body> 
        
         </html>

<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="java.io.File"%>
<%@page import="org.apache.commons.fileupload.FileItem"%>
<%@page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>

<%
    request.setCharacterEncoding("UTF-8");
    //將用戶傳遞過來的request中的內容解析出來，斷定其類型，若是是常規的普通表單字段，執行處理方式一
    //不然就表明的是文件域，那麼執行處理方式二
    //01.斷定是普通表單，仍是用來上傳文件的表單
    boolean flag= ServletFileUpload.isMultipartContent(request);
    if(flag){
        //開始找到一個解析器，來解析請求中的各個項目
        DiskFileItemFactory factory=new DiskFileItemFactory();
        ServletFileUpload upload=new ServletFileUpload(factory);//解析器upload建立成功
        List<FileItem> fileList=upload.parseRequest(request);
        //每個FileItem都表明一個表單元素
        Iterator<FileItem> myitor=fileList.iterator();
        while(myitor.hasNext()){
           FileItem item=myitor.next();
           if(item!=null){
               //對當前item進行驗證，看它是普通表單仍是上傳用的文件域
               if(item.isFormField()){//證實是普通的表單字段
                   //獲取該表單元素的內容(value值)
                   String name=item.getFieldName();//這是表單元素的name屬性，而不是value值
                   if(name.equals("username")){
                       out.print(item.getString("UTF-8"));
                   }
               }else{  //是一個文件域
                   String fileName=item.getName();//ef.doc
                   //扔到服務器的目錄下
                   String path="/WEB-INF/upload";//文件上傳不能用相對路徑
                   //將相對路徑轉換成絕對路徑
                   String abosolutePath=this.getServletContext().getRealPath(path);
                   File file=new File(fileName);
                   File uploadFile=new File(abosolutePath,file.getName());
                   item.write(uploadFile);
                   out.print("上傳成功");  
               }
           }
        }
    }
%>

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