new FileBody(tmpfile, "test-file", "text/plain", "ANSI_X3.4-1968"));
FormBodyPart p3 = new FormBodyPart(
"field3",
new InputStreamBody(new FileInputStream(tmpfile), "file.tmp"));
multipart.addBodyPart(p1);
multipart.addBodyPart(p2);
multipart.addBodyPart(p3);
multipart.setMode(HttpMultipartMode.STRICT);