如何使用JSP从URL获取参数值

我在url中传递了这个参数

http：//localhost/proj/home.jsp？var = P q EvhE951eg / I5nz1vi / w2YpJdH v / vSPaQNg / I =

现在在home.jsp中我想使用var的这个值.但是当我这样做时

String var = request.getParameter(“var”); var获取值

“P q EvhE951eg / I5nz1vi / w2YpJdH v / vSPaQNg / I =”注意它用空格替换.

所以任何人都可以帮我解决这个问题.

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);
    }
}

输出：

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