jsp---》》》新闻发布系统的项目跟踪+++++++文件上传

先来一个分层架构图：

WeebRoot目录下的页面：

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

userInfoServlet中的全部代码：

package cn.news.Servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.SQLException;

import java.util.ArrayList;

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.INewsDAO;

import cn.news.dao.impl.NewsInfoDAOImpl;

import cn.news.entity.NewsInfo;

import cn.news.entity.UserInfo;

import cn.news.service.INewsInfoService;

import cn.news.service.IUserInfoService;

import cn.news.service.impl.NewInfoServiceImpl;

import cn.news.service.impl.UserInfoServiceImpl;

public class UserInfoServlet 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 {

		//准备新闻数据

		/*INewsInfoService newsservice =new NewInfoServiceImpl();

		try {

			List<NewsInfo> list=newsservice.getAllNews();

			//放入request作用域

			request.setAttribute("newsList", list);

		} catch (SQLException e) {

		}*/

		INewsDAO dao=new NewsInfoDAOImpl();

		List<NewsInfo> list=null;

		try {

			list = dao.getAllNews();

			//System.out.println(list.size());

			request.setAttribute("newsList", list);

		} catch (SQLException e1) {

			e1.printStackTrace();

		}

		String action=request.getParameter("action");

		if("logout".equals(action)){

			//执行注销

			//第一步：先清除session

			request.getSession().removeAttribute("uname");

			//第二步：跳转到index.jsp（登录页面）

			/*response.sendRedirect("/NewsManagerSystem/index.jsp");*/

			request.getRequestDispatcher("/index.jsp").forward(request, response);

		}else if("login".equals(action)){

			//code write here

			//1.解决乱码

			request.setCharacterEncoding("utf-8");

			//2.解析前台传递的表单数据

			String uname=request.getParameter("uname");

			String upwd=request.getParameter("upwd");

			//拼接成一个用户对象

			UserInfo info=new UserInfo();

			info.setUname(uname);

			info.setUpwd(upwd);

			IUserInfoService service=new UserInfoServiceImpl();

			try {

				boolean flag = service.isLogin(info);

				if (flag) {  //登录成功

					//3.记录session

					request.getSession().setAttribute("uname", uname);

					//4.转发或者重定向   转发不需要加项目名称

					request.getRequestDispatcher("/newspages/admin.jsp").forward(request, response);

				}else {

					response.sendRedirect("/NewsManagerSystem/index.jsp");

				}

			} catch (SQLException e) {

				e.printStackTrace();

			}

		}else{

			//第一次访问首页

			request.getRequestDispatcher("/index.jsp").forward(request,response);

		}

		}

}

　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

文件上传

需要用到commons-fileupload-1.3.2.jar和commons-io-2.5.jar两个jar文件

需求：点击提交上传文件

<%@ 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"/>

             选择文件：<input type="file" name="myfile" />

             <input type="submit" value="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");

               }

           }

        }

    }

%>

巴特西

jsp---》》》新闻发布系统的项目跟踪+++++++文件上传

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