（8）基于hadoop的简单网盘应用实现4
来源：互联网 发布：剑三少林正太脸型数据 编辑：程序博客网 时间：2024/06/06 07:38
文件结构
（1）、index.jsp首页面实现
index.jsp
<%@ include file="head.jsp"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@page import="org.apache.hadoop.fs.FileStatus"%> <body style="text-align:center;margin-bottom:100px;"> <div class="navbar" > <div class="navbar-inner"> <a class="brand" href="#" style="margin-left:200px;">网盘</a> <ul class="nav"> <li><a href="LogoutServlet">退出</a></li> </ul> </div> </div> <div style="margin:0px auto; text-align:left;width:1200px; height:50px;"> <form class="form-inline" method="POST" enctype="MULTIPART/FORM-DATA" action="UploadServlet" > <div style="line-height:50px;float:left;"> <input type="submit" name="submit" value="上传文件" /> </div> <div style="line-height:50px;float:left;"> <input type="file" name="file1" size="30"/> </div> </form> </div> <div style="margin:0px auto; width:1200px;height:500px; background:#fff"> <table class="table table-hover" style="width:1000px;margin-left:100px;"> <tr style=" border-bottom:2px solid #ddd"> <td >文件名</td><td style="width:100px">类型</td><td style="width:100px;">大小</td><td style="width:100px;">操作</td><td style="width:100px;">操作</td> </tr> <%FileStatus[] list = (FileStatus[])request.getAttribute("list");if(list != null)for (int i=0; i<list.length; i++) {%><tr style="border-bottom:1px solid #eee"><%if(list[i].isDir()){out.print("<td> <a href=\"DocumentServlet?filePath="+list[i].getPath()+"\">"+list[i].getPath().getName()+"</a></td>");}else{out.print("<td>"+list[i].getPath().getName()+"</td>");}%> <td><%= (list[i].isDir()?"目录":"文件") %></td><td><%= list[i].getLen()/1024%></td><td><a href="DeleteFileServlet?filePath=<%=java.net.URLEncoder.encode(list[i].getPath().toString(),"GB2312") %>">x</a></td><td><a href="DownloadServlet?filePath=<%=java.net.URLEncoder.encode(list[i].getPath().toString(),"GB2312") %>">下载</a></td> </tr ><%}%> </table> </div> </body> 
（2）document.jsp文件
<%@ include file="head.jsp"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@page import="org.apache.hadoop.fs.FileStatus"%> <body style="text-align:center;margin-bottom:100px;"> <div class="navbar" > <div class="navbar-inner"> <a class="brand" href="#" style="margin-left:200px;">网盘</a> <ul class="nav"> <li class="active"><a href="#">首页</a></li> <li><a href="#">Link</a></li> <li><a href="#">Link</a></li> </ul> </div> </div> <div style="margin:0px auto; text-align:left;width:1200px; height:50px;"> <form class="form-inline" method="POST" enctype="MULTIPART/FORM-DATA" action="UploadServlet" > <div style="line-height:50px;float:left;"> <input type="submit" name="submit" value="上传文件" /> </div> <div style="line-height:50px;float:left;"> <input type="file" name="file1" size="30"/> </div> </form> </div> <div style="margin:0px auto; width:1200px;height:500px; background:#fff"><table class="table table-hover" style="width:1000px;margin-left:100px;"><tr><td>文件名</td><td>属性</td><td>大小(KB)</td><td>操作</td><td>操作</td></tr><%FileStatus[] list = (FileStatus[])request.getAttribute("documentList");if(list != null)for (int i=0; i<list.length; i++) {%><tr style=" border-bottom:2px solid #ddd"><%if(list[i].isDir()){out.print("<td><a href=\"DocumentServlet?filePath="+list[i].getPath()+"\">"+list[i].getPath().getName()+"</a></td>");}else{out.print("<td>"+list[i].getPath().getName()+"</td>");}%> <td><%= (list[i].isDir()?"目录":"文件") %></td><td><%= list[i].getLen()/1024%></td><td><a href="DeleteFileServlet?filePath=<%=java.net.URLEncoder.encode(list[i].getPath().toString(),"GB2312") %>">x</a></td><td><a href="DownloadServlet?filePath=<%=java.net.URLEncoder.encode(list[i].getPath().toString(),"GB2312") %>">下载</a></td> </tr><%}%></table> </div></body></html>（3）DeleteFileServlet 文件
package com.controller;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.hadoop.fs.FileStatus;import org.apache.hadoop.mapred.JobConf;import com.model.HdfsDAO;import com.sun.security.ntlm.Server;/** * Servlet implementation class DeleteFileServlet */public class DeleteFileServlet extends HttpServlet { /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String filePath = new String(request.getParameter("filePath").getBytes("ISO-8859-1"),"GB2312"); JobConf conf = HdfsDAO.config(); HdfsDAO hdfs = new HdfsDAO(conf); hdfs.rmr(filePath); System.out.println("===="+filePath+"===="); FileStatus[] list = hdfs.ls("/user/root/"); request.setAttribute("list",list);request.getRequestDispatcher("index.jsp").forward(request,response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doGet(request, response);}}（4）UploadServlet文件
package com.controller;import java.io.File;import java.io.IOException;import java.util.Iterator;import java.util.List;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.jsp.PageContext;import org.apache.commons.fileupload.DiskFileUpload;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.hadoop.fs.FileStatus;import org.apache.hadoop.mapred.JobConf;import com.model.HdfsDAO; /** * Servlet implementation class UploadServlet */public class UploadServlet extends HttpServlet { /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); File file ; int maxFileSize = 50 * 1024 *1024; //50M int maxMemSize = 50 * 1024 *1024; //50M ServletContext context = getServletContext(); String filePath = context.getInitParameter("file-upload");System.out.println("source file path:"+filePath+""); // 验证上传内容了类型 String contentType = request.getContentType(); if ((contentType.indexOf("multipart/form-data") >= 0)) { DiskFileItemFactory factory = new DiskFileItemFactory(); // 设置内存中存储文件的最大值 factory.setSizeThreshold(maxMemSize); // 本地存储的数据大于 maxMemSize. factory.setRepository(new File("c:\\temp")); // 创建一个新的文件上传处理程序 ServletFileUpload upload = new ServletFileUpload(factory); // 设置最大上传的文件大小 upload.setSizeMax( maxFileSize ); try{ // 解析获取的文件 List fileItems = upload.parseRequest(request); // 处理上传的文件 Iterator i = fileItems.iterator(); System.out.println("begin to upload file to tomcat server</p>"); while ( i.hasNext () ) { FileItem fi = (FileItem)i.next(); if ( !fi.isFormField () ) { // 获取上传文件的参数 String fieldName = fi.getFieldName(); String fileName = fi.getName(); String fn = fileName.substring( fileName.lastIndexOf("\\")+1); System.out.println("<br>"+fn+"<br>"); boolean isInMemory = fi.isInMemory(); long sizeInBytes = fi.getSize(); // 写入文件 if( fileName.lastIndexOf("\\") >= 0 ){ file = new File( filePath , fileName.substring( fileName.lastIndexOf("\\"))) ; //out.println("filename"+fileName.substring( fileName.lastIndexOf("\\"))+"||||||"); }else{ file = new File( filePath , fileName.substring(fileName.lastIndexOf("\\")+1)) ; } fi.write( file ) ; System.out.println("upload file to tomcat server success!"); System.out.println("begin to upload file to hadoop hdfs</p>"); //将tomcat上的文件上传到hadoop上 String username = (String) request.getSession().getAttribute("username"); JobConf conf = HdfsDAO.config(); HdfsDAO hdfs = new HdfsDAO(conf); hdfs.copyFile(filePath+"\\"+fn, "/"+username+"/"+fn); System.out.println("upload file to hadoop hdfs success!"); System.out.println("username-----"+username); FileStatus[] list = hdfs.ls("/"+username); request.setAttribute("list",list); request.getRequestDispatcher("index.jsp").forward(request, response); } } }catch(Exception ex) { System.out.println(ex); } }else{ System.out.println("<p>No file uploaded</p>"); } }}（5）DownloadServlet文件
package com.controller;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.hadoop.fs.FileStatus;import org.apache.hadoop.mapred.JobConf;import com.model.HdfsDAO;/** * Servlet implementation class DownloadServlet */public class DownloadServlet extends HttpServlet {private static final long serialVersionUID = 1L;/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {String local = "C:/";String filePath = new String(request.getParameter("filePath").getBytes("ISO-8859-1"),"GB2312");System.out.println(filePath);JobConf conf = HdfsDAO.config(); HdfsDAO hdfs = new HdfsDAO(conf); hdfs.download(filePath, local); FileStatus[] list = hdfs.ls("/user/root/"); request.setAttribute("list",list); request.getRequestDispatcher("index.jsp").forward(request,response); }/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doGet(request, response);}}（6）DocumentServlet文件
package com.controller;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.hadoop.fs.FileStatus;import org.apache.hadoop.mapred.JobConf;import com.model.HdfsDAO;/** * Servlet implementation class DocumentServlet */public class DocumentServlet extends HttpServlet {private static final long serialVersionUID = 1L; /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String filePath = new String(request.getParameter("filePath").getBytes("ISO-8859-1"),"GB2312"); JobConf conf = HdfsDAO.config(); HdfsDAO hdfs = new HdfsDAO(conf); FileStatus[] documentList = hdfs.ls(filePath); request.setAttribute("documentList",documentList); request.getRequestDispatcher("document.jsp").forward(request,response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doGet(request, response);}}package com.controller;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;/** * Servlet implementation class LogoutServlet */public class LogoutServlet extends HttpServlet {private static final long serialVersionUID = 1L; /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {HttpSession session = request.getSession(); session.removeAttribute("username"); request.getRequestDispatcher("login.jsp").forward(request, response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response);}}到此，一个简单的基于hadoop的网盘应用就完成了，如果想把它做的更像一个真正的网盘，大家可以花多点时间去实现剩下的功能。
源代码下载地址：http://download.csdn.net/detail/wen294299195/7779949
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