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I’m having trouble capturing the parameters of an HTML form with enctype="Multipart/form-data", I can upload an image through the form, but I can’t capture text typed in the form.
The form looks like this:
<form method="post" action="UploadServlet" enctype="multipart/form-data">
Select file to upload: <input type="file" name="file" size="60" /><br />
Enter text: <input type="name" name="teste"/><br />
<br /> <input type="submit" value="Upload" />
</form>
My Servlet to capture the data sent by POST is like this:
import java.io.File;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
@WebServlet("/UploadServlet")
@MultipartConfig(fileSizeThreshold=1024*1024*2, // 2MB
maxFileSize=1024*1024*10, // 10MB
maxRequestSize=1024*1024*50) // 50MB
public class UploadServlet extends HttpServlet {
/**
* Name of the directory where uploaded files will be saved, relative to
* the web application directory.
*/
private static final String SAVE_DIR = "uploadFiles";
/**
* handles file upload
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// gets absolute path of the web application
String appPath = request.getServletContext().getRealPath("");
// constructs path of the directory to save uploaded file
String savePath = appPath + File.separator + SAVE_DIR;
//Capturar campo teste do formulário
String teste = request.getParameter("teste");
System.out.println("Parametro capturado: " + teste);
// creates the save directory if it does not exists
File fileSaveDir = new File(savePath);
if (!fileSaveDir.exists()) {
fileSaveDir.mkdir();
}
for (Part part : request.getParts()) {
String fileName = extractFileName(part);
part.write(fileName);
}
request.setAttribute("message", "Upload has been done successfully!");
getServletContext().getRequestDispatcher("/message.jsp").forward(
request, response);
}
/**
* Extracts file name from HTTP header content-disposition
*/
private String extractFileName(Part part) {
String contentDisp = part.getHeader("content-disposition");
String[] items = contentDisp.split(";");
for (String s : items) {
if (s.trim().startsWith("filename")) {
return s.substring(s.indexOf("=") + 2, s.length()-1);
}
}
return "";
}
}
When the attribute enctype="Multipart/form-data" is in the form I cannot capture text, because the request.getParameter() always returns a null value. I use Glassfish server 4.1, and I am starting my studies in back-end. Already, I graduate the help of all.