public static String urlPrepareUri(HttpServletRequest req) {
    String str = "";
    Enumeration en = req.getParameterNames();
    while(en.hasMoreElements()) {
      String key = (String) en.nextElement();
      str += key + ":";
    }
    str = str.substring(0,str.lastIndexOf(":"));
    return str;
  }

myValue = request.getQueryString();
String[] a = myValue.split("=");
String st="";
  for(int i=0;i<(a.length - 1);i++) {
    String s = a[i];
    if(s.indexOf('&') != -1) {
      String[] ch = s.split("&");
      st += ch[1] + ":";
    } else {
      st += s + ":";
    }
  }
st = st.substring(0,st.lastIndexOf(":"));
myValue = st;