[적용 예] File Upload/Download

File Upload/Download Service 를 적용해서 FAQ 파일첨부에 사용한다.

<entry key="fileDir" value="C:\\Temp\\"/>
<entry key="filePath" value="C:\\Temp\\"/>

<!-- MULTIPART RESOLVERS -->
<!-- regular spring resolver -->
<bean id="spring.RegularCommonsMultipartResolver"
 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="100000000" />
    <property name="maxInMemorySize" value="100000000" />
</bean>
 
<!-- custom multi file resolver -->
<bean id="local.MultiCommonsMultipartResolver"
  class="egovframework.rte.cvpl.web.resolver.MultiCommonsMultipartResolver">
    <property name="maxUploadSize" value="100000000" />
    <property name="maxInMemorySize" value="100000000" />
</bean>
 
<!-- choose one from above and alias it to the name Spring expects -->
<alias name="local.MultiCommonsMultipartResolver" alias="multipartResolver" />

public class MultiCommonsMultipartResolver extends CommonsMultipartResolver {
 
    public MultiCommonsMultipartResolver() {}
 
    public MultiCommonsMultipartResolver(ServletContext servletContext) {
        super(servletContext);
    }
 
    /**
     * Only one line changed which is indicated below.
     */
    @Override
    @SuppressWarnings("unchecked")
    protected MultipartParsingResult parseFileItems(List fileItems, String encoding) {
        Map multipartFiles = new HashMap();
        Map multipartParameters = new HashMap();
 
        // Extract multipart files and multipart parameters.
        for (Iterator it = fileItems.iterator(); it.hasNext();) {
            FileItem fileItem = (FileItem) it.next();
            if (fileItem.isFormField()) {
                String value = null;
                if (encoding != null) {
                    try {
                        value = fileItem.getString(encoding);
                    } catch (UnsupportedEncodingException ex) {
                        if (logger.isWarnEnabled()) {
                            logger.warn("Could not decode multipart item '" + fileItem.getFieldName()
                                    + "' with encoding '" + encoding + "': using platform default");
                        }
                        value = fileItem.getString();
                    }
                } else {
                    value = fileItem.getString();
                }
                String[] curParam = (String[]) multipartParameters.get(fileItem.getFieldName());
                if (curParam == null) {
                    // simple form field
                    multipartParameters.put(fileItem.getFieldName(), new String[] { value });
                } else {
                    // array of simple form fields
                    String[] newParam = StringUtils.addStringToArray(curParam, value);
                    multipartParameters.put(fileItem.getFieldName(), newParam);
                }
            } else {
                // multipart file field
                CommonsMultipartFile file = new CommonsMultipartFile(fileItem);
                if (multipartFiles.put(fileItem.getName(), file) != null) { // CHANGED!!
                    throw new MultipartException("Multiple files for field name [" + file.getName()
                            + "] found - not supported by MultipartResolver");
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("Found multipart file [" + file.getName() + "] of size " + file.getSize()
                            + " bytes with original filename [" + file.getOriginalFilename() + "], stored "
                            + file.getStorageDescription());
                }
            }
        }
        return new MultipartParsingResult(multipartFiles, multipartParameters);
    }
 
}

/** 파일 처리 */
final Map<String, MultipartFile> files = multiRequest.getFileMap();
 
/** 디렉토리 생성 */
File saveFolder = new File(propertiesService.getString("fileDir"));
boolean isDir = false;
if (!saveFolder.exists() || saveFolder.isFile()) {
	isDir = saveFolder.mkdirs();
} else {
	isDir = true;
}
 
if (!isDir) {
	log.debug("Fail Create folder!!");
	model.addAttribute("cvplFaqVO", cvplFaqVO);
	/* Session */
	EgovCvplSessionAuth egovCvplSessionAuth = (EgovCvplSessionAuth)EgovUserDetailsHelper.getAuthenticatedUser();    	
    model.addAttribute("egovCvplSessionAuth", egovCvplSessionAuth);
 
	return "/cvpl/EgovCvplFaqUpdate";
}
 
Iterator<Entry<String, MultipartFile>> itr = files.entrySet().iterator();
MultipartFile file;
String filePath = "";
int fileKey = 0;
 
while (itr.hasNext()) {
	Entry<String, MultipartFile> entry = itr.next();
 
	file = entry.getValue();
	if (!"".equals(file.getOriginalFilename())) {
		filePath = propertiesService.getString("filePath") + file.getOriginalFilename();
		file.transferTo(new File(filePath));
	}
 
	if(fileKey == 0 && !"".equals(file.getOriginalFilename())) {
		cvplFaqVO.setFaqAtch1(file.getOriginalFilename());
	}
	if(fileKey == 1 && !"".equals(file.getOriginalFilename())) {
		cvplFaqVO.setFaqAtch2(file.getOriginalFilename());
	}
	fileKey++;
}

<script type="text/javascript" src="<c:url value='/js/egovframework/rte/cvpl/multifile.js'/>"></script>
<script type="text/javaScript" language="javascript" defer="defer">
<!--
var multi_selector = new MultiSelector( document.getElementById( 'cvplFileList' ), 2 );
multi_selector.addElement( document.getElementById( 'cvplFileUploader' ) );
.
.
.
<form:form commandName="cvplFaqVO" name="updateForm" enctype="multipart/form-data" method="post">
.
.
.
<tr>
    <th><spring:message code='title.faq.faqAtch1' /></th>
    <td><input name="file_1" id="cvplFileUploader" type="file" /></td>
</tr>
<tr>
    <th><spring:message code='title.faq.faqAtch2' /></th>
    <td>
    	<div id="cvplFileList"></div>
    </td>
</tr>
.
.
.
</form:form>

/**
 * 첨부파일을 다운로드한다.
 * @param 다운로드할 파일명
 * @return 첨부파일
 * @exception Exception
 */
@RequestMapping(value = "/cvpl/egovDownloadFile.do")
public void cvplFileDownload (
		@RequestParam(value = "requestedFile") String requestedFile,
		HttpServletResponse response) throws Exception {
 
	String uploadPath = propertiesService.getString("fileDir");
 
	File uFile = new File(uploadPath, requestedFile);
	int fSize = (int) uFile.length();
 
	if (fSize > 0) {
		BufferedInputStream in = new BufferedInputStream(new FileInputStream(uFile));
 
		response.setBufferSize(fSize);
		response.setContentType("application/x-msdownload;charset=euc-kr");
		response.setHeader("Content-Disposition", "attachment; filename=\""
				+ requestedFile + "\"");
		response.setContentLength(fSize);
 
		FileCopyUtils.copy(in, response.getOutputStream());
		in.close();
		response.getOutputStream().flush();
		response.getOutputStream().close();
	} else {
		response.setContentType("application/x-msdownload");
		PrintWriter printwriter = response.getWriter();
		printwriter.println("<html>");
		printwriter.println("<br><br><br><h2>Could not get file name:<br>"
				+ requestedFile + "</h2>");
		printwriter
				.println("<br><br><br><center><h3><a href='javascript: history.go(-1)'>Back</a></h3></center>");
		printwriter.println("<br><br><br>&copy; webAccess");
		printwriter.println("</html>");
		printwriter.flush();
		printwriter.close();
	}
}

function fn_egov_download_file(reqfile) {
	window.open(encodeURI("<c:url value='/cvpl/egovDownloadFile.do?'/>requestedFile=") + reqfile);
}
.
.
.
<tr>
    <th><spring:message code='title.faq.faqAtch1' /></th>
	<td>
	<c:if test="${cvplFaqVO.faqAtch1 != ''}">
	<c:out value='${cvplFaqVO.faqAtch1}'/>
	<span><input type="button" onclick="javascript:fn_egov_download_file('<c:out value="${cvplFaqVO.faqAtch1}"/>')"
				 value="<spring:message code='button.download' />" /></span>
       </c:if>
	<c:if test="${cvplFaqVO.faqAtch2 != ''}">
    	<br/><c:out value='${cvplFaqVO.faqAtch2}'/>
		<span><input type="button" onclick="javascript:fn_egov_download_file('<c:out value="${cvplFaqVO.faqAtch2}"/>')"
    				 value="<spring:message code='button.download' />" /></span>
       </c:if>
	</td>
</tr>
.
.
.