commons-fileupload-1.2.1.jar

commons-io-1.3.2.jar

注意：工程中需要引入commons-fileupload的包。

upload.java

package servlet;

import java.io.File;

import java.io.IOException;

import java.util.Iterator;

import java.util.List;

import java.util.UUID;

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.FileUploadException;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

@SuppressWarnings("serial")

public class Upload extends HttpServlet {

@SuppressWarnings("unchecked")

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

String savePath = this.getServletConfig().getServletContext()

.getRealPath("");

savePath = savePath + "/uploads/";

File f1 = new File(savePath);

System.out.println(savePath);

if (!f1.exists()) {

f1.mkdirs();

}

DiskFileItemFactory fac = new DiskFileItemFactory();

ServletFileUpload upload = new ServletFileUpload(fac);

upload.setHeaderEncoding("utf-8");

List fileList = null;

try {

fileList = upload.parseRequest(request);

} catch (FileUploadException ex) {

return;

}

Iterator it = fileList.iterator();

String name = "";

String extName = "";

while (it.hasNext()) {

FileItem item = it.next();

if (!item.isFormField()) {

name = item.getName();

long size = item.getSize();

String type = item.getContentType();

System.out.println(size + " " + type);

if (name == null || name.trim().equals("")) {

continue;

}

//擴(kuò)展名格式：

if (name.lastIndexOf(".") >= 0) {

extName = name.substring(name.lastIndexOf("."));

}

File file = null;

do {

//生成文件名：

name = UUID.randomUUID().toString();

file = new File(savePath + name + extName);

} while (file.exists());

File saveFile = new File(savePath + name + extName);

try {

item.write(saveFile);

} catch (Exception e) {

e.printStackTrace();

}

}

}

response.getWriter().print(name + extName);

}

}

index.jsp

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

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web.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

Upload

servlet.Upload

Upload

/servlet/Upload

index.jsp

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