基于common-fileupload实现文件上传

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>

基于common-fileupload实现文件上传

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