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新闻发布系统

先来一个分层架构图:

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WeebRoot目录下的页面:

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现在,此项目以实现登录,注销,新闻列表,编辑主题》》》》

先来登录部分的关键代码

 index.jsp中的代码

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userInfoServlet中的全部代码:

+ View Code

 

 TopicServlet中的代码

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 {
        //调度Topic的service
        ITopicService service=new TopicServiceImpl();
        try {
            List<Topic> list=service.getAllTopic();
            request.setAttribute("topiclist", list);
            //System.out.println(list.size());
            //转发到列表页
            request.getRequestDispatcher("/newspages/topic_list.jsp").forward(request, response);
        } catch (SQLException e) {
            
        }
    }

}

 

topic_list中的代码

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<%@ 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=http://www.mamicode.com/"<%=basePath%>">
 
  </head>
   
  <body>
  <%=path %>
    <form enctype="multipart/form-data" action="<%=path %>/test.jsp" method="post">
             姓       名: <input name="username"/>
             选择文件:<input type="file" name="myfile" />
             <input type="submit" value=http://www.mamicode.com/"上传"/> 
    </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");
    //将用户传递过来的request中的内容解析出来,判定其类型,如果是常规的普通表单字段,执行处理方式一
    //否则就代表的是文件域,那么执行处理方式二
    //01.判定是普通表单,还是用来上传文件的表单
    boolean flag= ServletFileUpload.isMultipartContent(request);
    if(flag){
        //开始找到一个解析器,来解析请求中的各个项目
        DiskFileItemFactory factory=new DiskFileItemFactory();
        ServletFileUpload upload=new ServletFileUpload(factory);//解析器upload创建成功
        List<FileItem> fileList=upload.parseRequest(request);
        //每一个FileItem都代表一个表单元素
        Iterator<FileItem> myitor=fileList.iterator();
        while(myitor.hasNext()){
           FileItem item=myitor.next();
           if(item!=null){
               //对当前item进行验证,看它是普通表单还是上传用的文件域
               if(item.isFormField()){//证明是普通的表单字段
                   //获取该表单元素的内容(value值)
                   String name=item.getFieldName();//这是表单元素的name属性,而不是value值
                   if(name.equals("username")){
                       out.print(item.getString("UTF-8"));
                   }
               }else{  //是一个文件域
                   String fileName=item.getName();//ef.doc
                   //扔到服务器的目录下
                   String path="/WEB-INF/upload";//文件上传不能用相对路径
                   //将相对路径转换成绝对路径
                   String abosolutePath=this.getServletContext().getRealPath(path);
                   File file=new File(fileName);
                   File uploadFile=new File(abosolutePath,file.getName());
                   item.write(uploadFile);
                   out.print("上传成功");  
               }
           }
        }
    }
%>

新闻发布系统