在JSP中使用fileupload上传文件，超出大小限制后，显示连接重置(火狐),或者无法显示此页(IE)

webxvc 2015-08-05 10:03:18

<%@page import="org.apache.commons.fileupload.FileUploadBase.FileSizeLimitExceededException"%>

<%@page import="org.apache.commons.fileupload.FileUploadBase"%>

<%@page import="java.io.File"%>

<%@page import="org.apache.commons.fileupload.*"%>

<%@page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>

<%@page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

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

%>



<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    

    <title>My JSP 'doupload.jsp' starting page</title>

    

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">    

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->



  </head>

  

  <body>

    <%

    	request.setCharacterEncoding("utf-8");

    	boolean isMultiPart = ServletFileUpload.isMultipartContent(request);

    	if(isMultiPart){

    		File tempDir = new File(request.getServletContext().getRealPath("/temp"));

    		if(!tempDir.exists()){

    			tempDir.mkdirs();

    		}

    		DiskFileItemFactory factory = new DiskFileItemFactory();

    		factory.setSizeThreshold(5);

    		factory.setRepository(tempDir);

    		ServletFileUpload upload = new ServletFileUpload(factory);

    		upload.setFileSizeMax(1024*30);

    		try{

	    		List<FileItem> fileItems = upload.parseRequest(request);

	    		for(FileItem fileItem : fileItems){

	    			if(fileItem.isFormField()){

	    				String fileName = fileItem.getFieldName();

	    				if(fileName != null && "uname".equals(fileName)){

	    					out.println(fileItem.getString("utf-8")+"上传了文件<br/>");

	    				}

	    			}else{

	    				List<String> allowFileType = Arrays.asList("jpg","jpeg");

	    				String name = fileItem.getName();

	    				String subFileName = name.substring(name.lastIndexOf(".")+1);

	    				if(!allowFileType.contains(subFileName)){

	    					out.println("上传文件失败，服务器只支持jpg、jpeg类型的文件。");

	    				}else{

		    				String savePath = request.getServletContext().getRealPath("/upload");

		    				String newName = UUID.randomUUID().toString()+name.substring(name.lastIndexOf("."));

		    				File file = new File(savePath+"/"+newName);

		    				fileItem.write(file);

		    				out.print("文件上传成功，上传的文件名为："+name);

	    				}

	    			}

	    		}

    		}catch(FileSizeLimitExceededException e){

    			e.printStackTrace();

    			out.println("文件上传失败，上传文件超出"+upload.getFileSizeMax()/1000+"KB.");

    		}catch(Exception e){

    			e.printStackTrace();

    		}

    	}

    %>

  </body>

</html>