package com.tarena.servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FilenameUtils;
import com.tarena.ajax.upload.MonitoredDiskFileItemFactory;
import com.tarena.ajax.upload.UploadListener;
public class FileUploadServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public FileUploadServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// upload file
upload(request, response);
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>Upload result</TITLE></HEAD>");
out.println(" <BODY>");
out.print("<h1 align=center>文件上传成功！</h1>");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException
* if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
private void upload(HttpServletRequest request, HttpServletResponse response)
throws IOException {
// 用于存放上传文件的目录
String uploadPath = "C:\\upload\\";
// 创建了一个监听器，用来监听文件上传的状态
// 进度条是通过这个监听器来动态改变的
UploadListener listener = new UploadListener(request, 30);
// (1)Create a factory for disk-based file items
FileItemFactory factory = new MonitoredDiskFileItemFactory(listener);
// (2)Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
try { // 允许上传的文件大小,4G
upload.setSizeMax(4 * 1024 * 1024 * 1024);
// (3) process uploads ..
List uploadlist = upload.parseRequest(request);
// 开始读取上传信息
Iterator iter = uploadlist.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (!item.isFormField()) {
// 忽略其他不是文件域的所有表单信息
// 取到客户端完整 路径+文件名 c:/abc.jpg
String fullpath = item.getName();
// 取到 文件名 abc.jpg
String filename = FilenameUtils.getName(fullpath);
// 取到文件类型 jpg
String filetype = getFiletype(filename);
// 判断是否有非法的文件类型
boolean flag = false;
// 过滤掉的文件类型
String[] errorType = { "exe", "com", "cgi", "jsp" };
for (int i = 0; i <= errorType.length - 1; i++) {
if (filetype.equals(errorType[i])) {
flag = true;
}
}
if (flag)
// 如果有非法文件,退出
break;
if (!filename.equals("")) {
// 文件重命名
File path = new File(uploadPath);
if (!path.exists()) {
// 目录不存在则创建
path.mkdir();
}
String savepath = uploadPath + filename;
System.out.println("savepath is " + savepath);
File saveFilepath = new File(savepath);
item.write(saveFilepath);
} else {
System.out.print("没东西!");
}
}
}
} catch (FileUploadBase.SizeLimitExceededException e) {
System.out.println("文件太大了吧!");
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
// 取文件名后缀
private String getFiletype(String fileName) {
String type = "";
if (fileName == null || fileName.equals(""))
return type;
int position = fileName.lastIndexOf(".");
if (position != -1) {
type = fileName.substring(position + 1, fileName.length());
}
return type;
}
}
DWR 实现ajax上传的小实例
需积分: 9 43 浏览量
2008-06-10
11:05:08
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收藏 565KB RAR 举报
Ajax-upload.rar （32个子文件） 
Ajax-upload 
.project 1KB .settings org.eclipse.ltk.core.refactoring.prefs 137B .mymetadata 306B WebRoot WEB-INF dwr.xml 305B web.xml 1KB lib 
commons-logging.jar 37KB commons-fileupload-1.1.jar 31KB dwr.jar 478KB commons-io-1.1.jar 60KB classes com tarena servlet FileUploadServlet.class 5KB filter EncodingFilter.class 1KB ajax upload UploadInfo.class 2KB MonitoredDiskFileItem.class 1KB MonitoredOutputStream.class 1KB UploadListener.class 2KB OutputStreamListener.class 248B MonitoredDiskFileItemFactory.class 1KB UploadMonitor.class 1KB resources css upload.css 123B images js upload.js 2KB index.jsp 2KB META-INF MANIFEST.MF 39B .myeclipse src com tarena servlet FileUploadServlet.java 5KB filter EncodingFilter.java 1KB ajax upload MonitoredOutputStream.java 1KB MonitoredDiskFileItem.java 1KB UploadMonitor.java 489B MonitoredDiskFileItemFactory.java 1KB UploadInfo.java 2KB UploadListener.java 2KB OutputStreamListener.java 288B .classpath 668B资源评论
