Java implements form submission (supports multiple files to upload simultaneously)

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/**
  * HttpClient tool class
  *
  * @author Zeng Fantian
  * @version 1.0
  */
public class HttpClientUtil
{
 public final static String Method_POST = "POST";
 public final static String Method_GET = "GET";
 /**
  * Multipart/form-data type form submission
  *
  * @param form
  * Form data
  */
 public static String submitForm(MultipartForm form)
 {
 // Return string String responseStr = "";
 // Create an HttpClient instance HttpClient httpClient = new DefaultHttpClient();
 try
 {
  // Instantiate the submission request  HttpPost httpPost = new HttpPost(());
  // Create MultipartEntityBuilder  MultipartEntityBuilder entityBuilder = ();
  // Append normal form fields  Map<String, String> normalFieldMap = ();
  for (Iterator<Entry<String, String>> iterator = ().iterator(); ();)
  {
  Entry<String, String> entity = ();
  ((), new StringBody((), ("text/plain", Consts.UTF_8)));
  }
  // Append file fields  Map<String, File> fileFieldMap = ();
  for (Iterator<Entry<String, File>> iterator = ().iterator(); ();)
  {
  Entry<String, File> entity = ();
  ((), new FileBody(()));
  }
  // Set the request entity  (());
  // Send a request  HttpResponse response = (httpPost);
  int statusCode = ().getStatusCode();
  // Get response data  HttpEntity resEntity = ();
  if (200 == statusCode)
  {
  if (resEntity != null)
  {
   responseStr = (resEntity);
  }
  }
 } catch (Exception e)
 {
  ("Submitting the form failed, reason:" + ());
 } finally
 {
  ().shutdown();
 }
 return responseStr;
 }
 /** Form field Bean */
 public class MultipartForm implements Serializable
 {
 /** Serial number */
 private static final long serialVersionUID = -2138044819190537198L;
 /** Submit URL **/
 private String action = "";
 /** Submission method: POST/GET **/
 private String method = "POST";
 /** Normal form field **/
 private Map<String, String> normalField = new LinkedHashMap<String, String>();
 /** File field **/
 private Map<String, File> fileField = new LinkedHashMap<String, File>();
 public String getAction()
 {
  return action;
 }
 public void setAction(String action)
 {
   = action;
 }
 public String getMethod()
 {
  return method;
 }
 public void setMethod(String method)
 {
   = method;
 }
 public Map<String, String> getNormalField()
 {
  return normalField;
 }
 public void setNormalField(Map<String, String> normalField)
 {
   = normalField;
 }
 public Map<String, File> getFileField()
 {
  return fileField;
 }
 public void setFileField(Map<String, File> fileField)
 {
   = fileField;
 }
 public void addFileField(String key, File value)
 {
  (key, value);
 }
 public void addNormalField(String key, String value)
 {
  (key, value);
 }
 }
}

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/**
  * File upload Servlet
  * @author Zeng Fantian
  */
public class ServletUploadFile extends HttpServlet
{
 private static final long serialVersionUID = 1L;
 // Limit the upload size of files 1G private int maxPostSize = 1000 * 1024 * 10;
 public ServletUploadFile()
 {
 super();
 }
 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
 IOException
 {
 doPost(request, response);
 }
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
 IOException
 {
 PrintWriter out = ();
 String contextPath = ().getServletContext().getRealPath("/");
 String webDir = "uploadfile" +  + "images" + ;
 String systemPath = ();
 String basePath = () + "://" + () + ":" + ()+ systemPath + "/";
 ("UTF-8");
 ("text/html;charset=UTF-8");
 try
 {
 DiskFileItemFactory factory = new DiskFileItemFactory();
 (1024 * 4); // Set the write size ServletFileUpload upload = new ServletFileUpload(factory);
 (maxPostSize); // Set the maximum file upload size (());
 //Get the parameters spliced ​​after the action (such as: ?q=android) Enumeration enumList = ();
 while(()){
 String key = (String)();
 String value = (key);
 (key+"="+value);
 }
 //Get Submit Form Item List listItems = (request);
 Iterator iterator = ();
 while (())
 {
 FileItem item = (FileItem) ();
 //Non-normal form items if (!())
 {
  //Get the extension  String ext = ().substring(().lastIndexOf("."), ().length());
  String fileName = () + ext;
  File dirFile = new File(contextPath + webDir + fileName);
  if (!())
  {
  ().mkdirs();
  }
  (dirFile);
  ("fileName：" + () + "=====" + () + " size： "+ ());
  ("The file has been saved to: " + contextPath + webDir + fileName);
  //Respond to client request  (basePath + ("\\", "/") + fileName);
  ();
 }else{
  //Ordinary form project  ("Form Ordinary Item:"+()+"=" + ("UTF-8"));// Display the form content.  ("UTF-8") can ensure that Chinese content is not garbled }
 }
 } catch (Exception e)
 {
 ();
 } finally
 {
 ();
 }
 }
}

//Create an HttpClientUtil instanceHttpClientUtil httpClient = new HttpClientUtil();
MultipartForm form =  MultipartForm();
//Set form properties and parameters("http://192.168.1.7:8080/UploadFileDemo/cn/com/ajava/servlet/ServletUploadFile");
File photoFile = new File(sddCardPath+"//data//");
("photo", photoFile);
("name", "Zeng Fantian");
("tel", "15122946685");
//Submit the form(form);