基于common-fileupload实现文件上传

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同事项目中可能用到基于servlet的上传，给他写了个Demo

1.依赖的jar包

commons-fileupload-1.2.2.jar

commons-io-2.2.jar

servlet-api-2.4.jar

2.项目源码

servlet的实现类FileUpload

import java.io.File;import java.io.IOException;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.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;public class FileUpload extends HttpServlet {    public FileUpload() {    }    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        request.setCharacterEncoding("utf-8");        File uploadPath = new File("D:\\temp");        if(!uploadPath.exists()) {            uploadPath.mkdirs();        }        File tempPathFile = new File("d:\\temp\\buffer\\");        if(!tempPathFile.exists()) {            tempPathFile.mkdirs();        }        DiskFileItemFactory factory = new DiskFileItemFactory();        factory.setSizeThreshold(1048576);        factory.setRepository(tempPathFile);        ServletFileUpload upload = new ServletFileUpload(factory);        upload.setSizeMax(1000000000000000L);        try {            List e = upload.parseRequest(request);            Iterator i = e.iterator();            while(i.hasNext()) {                FileItem fi = (FileItem)i.next();                String fileName = fi.getName();                if(fileName != null) {                    File fullFile = new File(fi.getName());                    File savedFile = new File(uploadPath, fullFile.getName());                    fi.write(savedFile);                }            }        } catch (Exception var13) {            var13.printStackTrace();        }        request.getRequestDispatcher("test.jsp").forward(request, response);    }}

index.jsp

<html><!--<form method="post" enctype="multipart/form-data" action="http://10.13.0.103:8080/messages/dispatch/upload_typed_nonfans_file.json?uid=2028810631&file_type=1&md5=">--><form method="post" enctype="multipart/form-data" action="FileUpload">  <input type="text" value="" name="name"/>  <input type="file" name="filedata"/>  <input type="submit" value="submit"/></form></html>

web.xml配置

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"         version="3.1">    <servlet>        <description>This is the description of my J2EE component</description>        <display-name>This is the display name of my J2EE component</display-name>        <servlet-name>FileUpload</servlet-name>        <servlet-class>FileUpload</servlet-class>    </servlet>    <servlet-mapping>        <servlet-name>FileUpload</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping></web-app>

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