5
我在JSP上有一個webform，它有幾個字符串值和一個通過servlet上傳到服務器的文件。奇怪的是我能夠將文件上傳到服務器，但無法使用request.getParameter("someString")獲取servlet中的值。表單參數不通過，但處理相同的表單中的文件？
我的代碼有什麼問題，或指導我？
編輯： 有了一點研究，我已經知道，如果我在表單標籤使用enctype="multipart/form-data"，我將無法使用request.getParameter()獲得在servlet的參數。現在的問題是，我怎樣才能將一個文件和其他值發送到一個servlet進行處理。
webform.jsp：
<form method="POST" enctype="multipart/form-data" action="/cassino/uploadFile" >
<fieldset>
<div class="form-group">
<label >*ID riparazione</label>
<input type="text" name="idRiparazione" />
</div>
<div class="form-group">
<label>*ID mandrino smontato</label>
<input type="text" name="idMandrinoSmontato" />
</div>
<div class="form-group">
<label>*Service livello(SL)</label>
<input type="text" name="serviceLivello" />
</div>
<div class="form-group">
<label>Attachment</label>
<input type="file" name="attachment" class="" id="attach" />
</div>
</fieldset>
</div>
<p class="text-right">
<input type="submit" value="Salva" name="newMacchina" />
<input type="reset" value="Cancella" />
</p>
</form>
而且uploadFile.java
@WebServlet(name = "uploadFile", urlPatterns = { "/uploadFile" })
public class uploadFile extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final int THRESHOLD_SIZE = 1024 * 1024 * 3;
private static final int MAX_FILE_SIZE = 1024 * 1024 * 15;
private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 20;
/**
* handles file upload via HTTP POST method
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// checks if the request actually contains upload file
//ServletFileUpload.isMultipartContent(request);
String idRiparazione = request.getParameter("idRiparazione");
String idMandrinoSmontato = request.getParameter("idMandrinoSmontato");
String serviceLivello = request.getParameter("serviceLivello");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body>");
out.println("<h1>Hello Servlet Get</h1>");
out.println(idMandrinoSmontato);
out.println(serviceLivello);
out.println("</body>");
out.println("</html>");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(THRESHOLD_SIZE);
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(MAX_FILE_SIZE);
upload.setSizeMax(MAX_REQUEST_SIZE);
// constructs the directory path to store upload file
String uploadPath = "C:\\SKFSFCassino\\uploads\\riparazione\\"; //getServletContext().getRealPath("") + File.separator + UPLOAD_DIRECTORY;
// creates the directory if it does not exist
File uploaddir = new File(uploadPath);
if(!uploaddir.exists()) {
uploaddir.mkdirs();
}
try {
List formItems = upload.parseRequest(request);
Iterator it = formItems.iterator();
// iterates over form's fields
while(it.hasNext()) {
FileItem item = (FileItem) it.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);
}
}
} catch (FileUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// response.sendRedirect(request.getContextPath()+"/modules/SKFsfRepair/new/viewNewContent.jsp");
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException {
throw new ServletException("GET method used with " + getClass().getName() + ": POST method required.");
}
我不認爲這有可能是與映射的問題，但我稍微困惑這個也是因爲我的web.xml未顯示任何映射或servlet。該servlet會，然而，上傳文件並返回以下輸出：
Hello Servlet Get
null null