我试图使用扩展HttpServlet的servlet从jsp页面上传一个csv文件.在jsp页面中,我使用的是一个应该调用servlet的ajax.
这是ajax部分：
$(function() {
$(".upldBtn").click(function() {
alert("Upload button pushed");
$.ajax({
type: "POST",url: contextPath + servletPath,data: "action=get&custIdList=" + $('#custIdList').val(),async: false,dataType: "text/csv; charset=utf-8",success: function(data){
alert("success");
}
});
});
contextPath和servletPath也被声明,我没有在这里指定它们.
在jsp页面中,我在表格中有这个表格：
在servlet中,我想使用这个doPost方法：
protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
String methodName = "doPost";
logger.debug("[{}] call",methodName);
// checks if the request actually contains upload file
if (!ServletFileUpload.isMultipartContent(request)) {
PrintWriter writer = response.getWriter();
writer.println("Request does not contain upload data");
logger.debug("[{}] Request does not contain upload data",methodName);
writer.flush();
return;
}
// configures upload settings
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(THRESHOLD_SIZE);
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
logger.debug("[{}] factory= {} ",methodName,factory);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(MAX_FILE_SIZE);
upload.setSizeMax(MAX_REQUEST_SIZE);
logger.debug("[{}] upload= {} ",upload);
// constructs the directory path to store upload file
String uploadPath = getServletContext().getRealPath("")
+ File.separator + UPLOAD_DIRECTORY;
// creates the directory if it does not exist
File uploadDir = new File(uploadPath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
logger.debug("[{}] upload directory = {} ",uploadDir.mkdir());
}
try {
// parses the request's content to extract file data
List formItems = upload.parseRequest(request);
Iterator iter = formItems.iterator();
// iterates over form's fields
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
// processes only fields that are not form fields
if (!item.isFormField()) {
String fileName = new File(item.getName()).getName();
String filePath = uploadPath + File.separator + fileName;
File storeFile = new File(filePath);
// saves the file on disk
item.write(storeFile);
}
}
request.setAttribute("message","Upload has been done successfully!");
logger.debug("[{}] Upload has been done successfully! ",methodName);
} catch (Exception ex) {
request.setAttribute("message","There was an error: " + ex.getMessage());
logger.debug("[{}] There was an error: {} ",ex);
}
getServletContext().getRequestDispatcher(
"/WEB-INF/web/csrCustomerLists/message.jsp").forward(request,response);
}
所有这些都停留在if(！ServletFileUpload.isMultipartContent(request)),返回：’Request不包含上传数据’.
我确信我没有正确地编写ajax,但我似乎无法找出我做错的地方.
谢谢.
最佳答案