public File doAttachment(HttpServletRequest request)
throws ServletException, IOException {
File file = null;
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
try {
List<?> items = upload.parseRequest(request);
Iterator<?> itr = items.iterator();
while (itr.hasNext()) {
FileItem item = (FileItem) itr.next();
if (item.isFormField()) {
parameters
.put(item.getFieldName(), item.getString("UTF-8"));
} else {
File tempFile = new File(item.getName());
file = new File(sc.getRealPath("/") + savePath, tempFile
.getName());
item.write(file);
}
}
} catch (Exception e) {
Logger logger = Logger.getLogger(SendAttachmentMailServlet.class);
logger.error("邮件发送出了异常", e);
}
return file;
}
/**
* Add listener to fileItem which is going to be automatically destroyed on session destruction
*
* @param pipelineContext PipelineContext
* @param fileItem FileItem
*/
public static void deleteFileOnSessionTermination(
PipelineContext pipelineContext, final FileItem fileItem) {
// Try to delete the file on exit and on session termination
final ExternalContext externalContext =
(ExternalContext) pipelineContext.getAttribute(PipelineContext.EXTERNAL_CONTEXT);
final ExternalContext.Session session = externalContext.getSession(false);
if (session != null) {
session.addListener(
new ExternalContext.Session.SessionListener() {
public void sessionDestroyed() {
deleteFileItem(fileItem, SESSION_SCOPE);
}
});
} else {
logger.debug(
"No existing session found so cannot register temporary file deletion upon session destruction: "
+ fileItem.getName());
}
}
/**
* Add listener to fileItem which is going to be automatically destroyed when the servlet is
* destroyed
*
* @param pipelineContext PipelineContext
* @param fileItem FileItem
*/
public static void deleteFileOnContextDestroyed(
PipelineContext pipelineContext, final FileItem fileItem) {
// Try to delete the file on exit and on session termination
final ExternalContext externalContext =
(ExternalContext) pipelineContext.getAttribute(PipelineContext.EXTERNAL_CONTEXT);
ExternalContext.Application application = externalContext.getApplication();
if (application != null) {
application.addListener(
new ExternalContext.Application.ApplicationListener() {
public void servletDestroyed() {
deleteFileItem(fileItem, APPLICATION_SCOPE);
}
});
} else {
logger.debug(
"No application object found so cannot register temporary file deletion upon session destruction: "
+ fileItem.getName());
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
for (FileItem item : items) {
if (item.isFormField()) {
// Process regular form field (input type="text|radio|checkbox|etc", select, etc).
String fieldname = item.getFieldName();
String fieldvalue = item.getString();
// ... (do your job here)
} else {
// Process form file field (input type="file").
String fieldname = item.getFieldName();
String filename = FilenameUtils.getName(item.getName());
InputStream filecontent = item.getInputStream();
// ... (do your job here)
}
}
} catch (FileUploadException e) {
throw new ServletException("Cannot parse multipart request.", e);
}
// ...
}