Document document = Jsoup.connect("http://www......com/....PHP")
                    .data("user","user","password","12345","email","info@tutorialswindow.com")
                    .method(Method.POST)
                    .execute()
                    .parse();

解决方法

String url = "http://www......com/....PHP";
File file = new File("/path/to/file.ext");

Document document = Jsoup.connect(url)
    .data("user","user")
    .data("password","12345")
    .data("email","info@tutorialswindow.com")
    .data("file",file.getName(),new FileInputStream(file))
    .post();
// ...

在旧版本中,不支持发送multipart / form-data请求.您最好的选择是使用完整的HTTP客户端,例如Apache HttpComponents Client.您最终可以将HTTP客户端响应作为String,以便您可以将其提供给Jsoup#parse()方法.

String url = "http://www......com/....PHP";
File file = new File("/path/to/file.ext");

MultipartEntity entity = new MultipartEntity();
entity.addPart("user",new StringBody("user"));
entity.addPart("password",new StringBody("12345"));
entity.addPart("email",new StringBody("info@tutorialswindow.com"));
entity.addPart("file",new InputStreamBody(new FileInputStream(file),file.getName()));

HttpPost post = new HttpPost(url);
post.setEntity(entity);

HttpClient client = new DefaultHttpClient();
HttpResponse response = client.execute(post);
String html = EntityUtils.toString(response.getEntity());

Document document = Jsoup.parse(html,url);
// ...