url encode & decode parameter and read parameter

Question

i success encode & decode the url parameter but how can i get the parameter after decode?? the reason i encode all query strings into a parameter just to prevent user change the parameter on the address bar.

For example

Page A

  function fnlink()
    {
        param1 = encodeURIComponent("INSCODE=91&NAME=LEE&EMAIL=abc");
    url = "/home/test/test2.jsp?"+param1;

    location.href= url; 
    }

Page B

url : http://localhost:9080/home/test/test2.jsp?INSCODE%3D91%26NAME%3DLEE%26EMAIL%3Dabc

Possible duplicate of [Parse a URI String into Name-Value Collection](http://stackoverflow.com/questions/13592236/parse-a-uri-string-into-name-value-collection) — Klitos Kyriacou, Mar 06 '17 at 14:03
http://stackoverflow.com/questions/13592236/parse-a-uri-string-into-name-value-collection shows you how to use `URL.getQuery` to extract the query part and then use `String.split` to get the individual parts into a map. Then use the map's methods to check & get values for specific parameters. — Klitos Kyriacou, Mar 06 '17 at 14:05
The method `getParameter` of request object returns the parameter you're looking already decoded. Not clear what's your problem. — freedev, Mar 06 '17 at 14:05
@freedev `getParameter` is a method that the OP wished existed. — Klitos Kyriacou, Mar 06 '17 at 14:07
Just so you are aware.. You are appending the QueryString parameters wrong. It should be: `request.getRequestURL() + "?" + request.getQueryString()`.. Note the question mark. — Brandon, Mar 06 '17 at 14:17
ok simple.. what i want is how to get parameter inscode, name, email.. java 7 not 8 .. — user3835327, Mar 06 '17 at 15:07

score 2 · Answer 1 · edited May 23 '17 at 10:30

You should not encode the entire parameters string "INSCODE=91&NAME=LEE&EMAIL=abc" with encodeURIComponent.

Each parameter should be encoded separately. Use a Javascript function like this to add your parameters at query string:

/**
* Add a URL parameter 
* @param {url}   string  url 
* @param {param} string  the key to set
* @param {value} string  value 
*/
var addParam = function(url, param, value) {
   param = encodeURIComponent(param);
   var a = document.createElement('a');
   param += (value ? "=" + encodeURIComponent(value) : ""); 
   a.href = url;
   a.search += (a.search ? "&" : "") + param;
   return a.href;
}

i tried this method, my parameter did not encode .. when redirect my parameter still show exact parameter .. — user3835327, Mar 06 '17 at 14:20

url encode & decode parameter and read parameter

For example

1 Answers1