Java FileItem类代码示例

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * 文件上传处理类
 *
 * @return {@link UploadResult}
 * @throws Exception 抛出异常
 */
public UploadResult upload() throws Exception {
    boolean multipartContent = ServletFileUpload.isMultipartContent(request);
    if (!multipartContent) {
        throw new RuntimeException("上传表单enctype类型设置错误");
    }

    List<TextFormResult> textFormResultList = Lists.newArrayList();
    List<FileFormResult> fileFormResultList = Lists.newArrayList();

    List<FileItem> fileItems = upload.parseRequest(request);
    for (FileItem item : fileItems) {
        if (item.isFormField())
            textFormResultList.add(processFormField(item));
        else
            fileFormResultList.add(processUploadedFile(item));
    }
    return new UploadResult(textFormResultList, fileFormResultList);
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
@Override
public void handle( List<FileItem> fileItems )
{
    for ( FileItem file : fileItems )
    {
        byte[] fileName = file.getName().getBytes();

        try
        {
            String uploadName = new String( fileName, "utf-8" );
            System.out.println( uploadName );

            File writeFile = new File( "D:\\" + uploadName );

            file.write( writeFile );

        } catch ( Exception e )
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
public Hashtable getHashtable(HttpServletRequest request)
        throws FileUploadException, IOException {
    Hashtable ht = new Hashtable();
    DiskFileUpload upload = new DiskFileUpload();
    List fileItems = upload.parseRequest(request);
    Iterator iter = fileItems.iterator();
    while (iter.hasNext()) {
        FileItem item = (FileItem) iter.next();
        if (item.isFormField()) {
            ht.put(item.getFieldName(), item.getString());
        } else {
            if (item.getName().equals("")) {
                //ht.put(item.getFieldName(), null);
            } else if (item.getSize() == 0) {
                //ht.put(item.getFieldName(), null);
            } else {
                ht.put(item.getFieldName(), item.getInputStream());
            }
        }
    }
    return ht;
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * 获取Excel数据,返回List
 * 
 * @param sheetNumber
 *            读取工作表的下标(从1开始).可有可无,默认读取所有表单.
 */
public static final List<String[]> excelToArrayList(String fileName, FileItem fileItem, int... sheetNumber)
    throws Exception {
    List<String[]> resultList = null;
    InputStream is = null;
    try {
        is = fileItem.getInputStream();
        resultList = excelToArrayList(fileName, is, sheetNumber);
    } catch (Exception e) {
        throw e;
    } finally {
        if (is != null) {
            is.close();
        }
    }
    return resultList;
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
@Override
public void process(Exchange exchange) throws Exception {
    DiskFileItemFactory factory = new DiskFileItemFactory();
    factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

    ExchangeFileUpload upload = new ExchangeFileUpload(factory);

    java.util.List<FileItem> items = upload.parseExchange(exchange);

    if(items.size() >= 1){
        exchange.getIn().setBody(items.get(0).getInputStream());

        for (int i = 1; i < items.size(); i++) {
            exchange.setProperty(items.get(i).getName(), items.get(i).getInputStream());
        }
    }
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * 获取Excel数据,返回List<String[]>
 * 
 * @param sheetNumber
 *            读取工作表的下标(从1开始).可有可无,默认读取所有表单.
 */
public static final List<String[]> excelToArrayList(String fileName, FileItem fileItem, int... sheetNumber)
		throws Exception {
	List<String[]> resultList = null;
	InputStream is = null;
	try {
		is = fileItem.getInputStream();
		resultList = excelToArrayList(fileName, is, sheetNumber);
	} catch (Exception e) {
		throw e;
	} finally {
		if (is != null) {
			is.close();
		}
	}
	return resultList;
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
public void importProject(HttpServletRequest req, HttpServletResponse resp) throws Exception {
	DiskFileItemFactory factory = new DiskFileItemFactory();
	ServletContext servletContext = req.getSession().getServletContext();
	File repository = (File) servletContext.getAttribute("javax.servlet.context.tempdir");
	factory.setRepository(repository);
	ServletFileUpload upload = new ServletFileUpload(factory);
	InputStream inputStream=null;
	boolean overwriteProject=true;
	List<FileItem> items = upload.parseRequest(req);
	if(items.size()==0){
		throw new ServletException("Upload file is invalid.");
	}
	for(FileItem item:items){
		String name=item.getFieldName();
		if(name.equals("overwriteProject")){
			String overwriteProjectStr=new String(item.get());
			overwriteProject=Boolean.valueOf(overwriteProjectStr);
		}else if(name.equals("file")){
			inputStream=item.getInputStream();
		}
	}
	repositoryService.importXml(inputStream,overwriteProject);
	IOUtils.closeQuietly(inputStream);
	resp.sendRedirect(req.getContextPath()+"/urule/frame");
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
public void importExcelTemplate(HttpServletRequest req, HttpServletResponse resp) throws Exception {
	DiskFileItemFactory factory=new DiskFileItemFactory();
	ServletFileUpload upload = new ServletFileUpload(factory);
	List<FileItem> items = upload.parseRequest(req);
	Iterator<FileItem> itr = items.iterator();
	List<Map<String,Object>> mapData=null;
	while (itr.hasNext()) {
		FileItem item = (FileItem) itr.next();
		String name=item.getFieldName();
		if(!name.equals("file")){
			continue;
		}
		InputStream stream=item.getInputStream();
		mapData=parseExcel(stream);
		httpSessionKnowledgeCache.put(req, IMPORT_EXCEL_DATA, mapData);
		stream.close();
		break;
	}
	httpSessionKnowledgeCache.put(req, IMPORT_EXCEL_DATA, mapData);
	writeObjectToJson(resp, mapData);
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
protected void getServiceResult(HttpServletRequest request, Document document) throws Exception {
	// Check that we have a file upload request
	boolean isMultipart = ServletFileUpload.isMultipartContent(request);

	if (!isMultipart)
		throw new IllegalArgumentException("Not multipart content!");

	FileItemFactory factory = new DiskFileItemFactory();

	// Create a new file upload handler
	ServletFileUpload upload = new ServletFileUpload(factory);

	// Parse the request
	List<FileItem> items = GenericUtils.cast(upload.parseRequest(request));

	// Process the uploaded items
	handleFormFields(request);
	for (FileItem item : items) {
		doUpload(request, document, item);
	}
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
@Override
public void upload(HttpServletRequest request, HttpServletResponse response) {
    try {
        serviceHelper.setCors(request, response);
        OutputStream outputStream = serviceHelper.setContext(request, response, URI);
        List<UploadReader> readers = new ArrayList<>();
        for (FileItem item : getUpload(request).parseRequest(request))
            if (!item.isFormField())
                readers.add(new HttpUploadReader(item));
        outputStream.write(json.toBytes(uploadService.uploads(readers)));
        outputStream.flush();
        outputStream.close();
    } catch (Throwable e) {
        logger.warn(e, "处理文件上传时发生异常！");
    } finally {
        closables.close();
    }
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * <pre>
 * 一時ファイルの保存処理ですが、性能を考慮し本来のフォルダに保存します。
 * </pre>
 */
@Override
public File makeTempFromFileItem(final FileItem fileItem) throws Exception {
	this.fileName = FileUtil.getFileName(fileItem.getName());

	File file = this.makeUniqFile();
	FileOutputStream os = new FileOutputStream(file);
	try {
		InputStream is = fileItem.getInputStream();
		try {
			FileUtil.copyStream(is, os);
		} finally {
			is.close();
		}
	} finally {
		os.close();
	}
	return file;
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * 文件上传
 *
 * @param request
 * @return infos info[0] 验证文件域返回错误信息 info[1] 上传文件错误信息 info[2] savePath
 * info[3] saveUrl info[4] fileUrl
 */
@SuppressWarnings("unchecked")
public String[] uploadFile(HttpServletRequest request) {
    String[] infos = new String[5];
    // 验证
    infos[0] = this.validateFields(request);
    // 初始化表单元素
    Map<String, Object> fieldsMap = new HashMap<String, Object>();
    if (infos[0].equals("true")) {
        fieldsMap = this.initFields(request);
    }
    // 上传
    List<FileItem> fiList = (List<FileItem>) fieldsMap.get(UploadUtils.FILE_FIELDS);
    if (fiList != null) {
        for (FileItem item : fiList) {
            infos[1] = this.saveFile(item);
        }
        infos[2] = savePath;
        infos[3] = saveUrl;
        infos[4] = fileUrl;
    }
    return infos;
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
public Map<String, Object> map(HttpServletRequest request) {
    ServletFileUpload upload = new ServletFileUpload(new DiskFileItemFactory());
    upload.setSizeMax(20 * 1024);
    upload.setFileSizeMax(10 * 1024);

    List<FileItem> items;
    try {
        items = upload.parseRequest(request);
    } catch (FileUploadException e) {
        throw new RequestMappingException("", e);
    }

    return items.stream().map(item -> {
        String key = item.getFieldName();
        if (item.isFormField()) {
            String value = item.getString();
            return new SimpleKeyValue<String, Object>(key, value);
        } else {
            return new SimpleKeyValue<String, Object>(key, item);
        }
    }).collect(Collectors.toMap(
            SimpleKeyValue::getKey,
            SimpleKeyValue::getValue
    ));
}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
	 * {@inheritDoc}
	 * <pre>
	 * BLOBに保存するためヘッダ情報 + ファイル本体の形式の一時ファイルを作成します。
	 * </pre>
	 */
	@Override
	protected File makeTempFromFileItem(final FileItem fileItem) throws Exception {
//		log.error("makeTempFromFileItem", new Exception());
		String fileName = FileUtil.getFileName(fileItem.getName());
		long length = fileItem.getSize();
		File file = null;
		InputStream is = fileItem.getInputStream();
		try {
			file = this.makeBlobTempFile(fileName, length, is);
		} finally {
			is.close();
		}
//		this.tempFile = file;
		return file;
	}
 

import org.apache.commons.fileupload.FileItem; //导入依赖的package包/类
/**
 * Retrieve a parameter passed to the servlet as part of a multi part content.
 * 
 * @param parameter
 *          the name of the parameter to be retrieved
 * @param requestFilter
 *          filter used to validate the input against list of allowed inputs
 * @return String containing the value of the parameter. Empty string if the content is not
 *         multipart or the parameter is not found.
 */
public String getMultiParameter(String parameter, RequestFilter requestFilter) {
  if (!isMultipart || items == null)
    return "";
  Iterator<FileItem> iter = items.iterator();
  while (iter.hasNext()) {
    FileItem item = iter.next();
    if (item.isFormField() && item.getFieldName().equals(parameter)) {
      try {
        String value = item.getString("UTF-8");
        filterRequest(requestFilter, value);
        return value;
      } catch (Exception ex) {
        ex.printStackTrace();
        return "";
      }
    }
  }
  return "";
}