How to get parameters value as it is from the URL with JSP

Try encoding params like this:

class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        String param = "P+q+EvhE951eg/I5nz1vi/w2YpJdH+v/vSPaQNg/I=";
        System.out.printf("Orginal Param: %s\n", param);
        param = java.net.URLEncoder.encode(param, "utf-8");
        System.out.printf("Encoded Param: %s\n", param);
    }
}

Output:

Orginal Param: P+q+EvhE951eg/I5nz1vi/w2YpJdH+v/vSPaQNg/I=
Encoded Param: P%2Bq%2BEvhE951eg%2FI5nz1vi%2Fw2YpJdH%2Bv%2FvSPaQNg%2FI%3D