java控制层get不到值_java 页面上有ENCTYPE="multipart/form-data" 时action方法或者控制层用request.getParameter()获取不到值的方法...

//org.apache.commons.fileupload

private Map getRequestParamaterMap(HttpServletRequest request) {

Map requestParamaterMap = new HashMap();

DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();

// 指定在内存中缓存数据大小,单位为byte

diskFileItemFactory.setSizeThreshold(1024000);

// 指定上传文件的临时目录

diskFileItemFactory.setRepository(tempDir);

ServletFileUpload servletFileUpload = new ServletFileUpload(diskFileItemFactory);

try {

List fileItemsList = servletFileUpload.parseRequest(request);

for (FileItem fileItem : fileItemsList) {

requestParamaterMap.put(fileItem.getFieldName(), fileItem);

}

} catch (Exception e) {

e.printStackTrace();

}

return requestParamaterMap;

}

//取值

String pkCollectItem = requestParamaterMap.get("pk_collect_item_base").getString(Constants.SYSTEM_CODING);