Question

If, for example, current page URL is ‘http://domain.com/page?param1=value1&param2=value2’, then:

<spring:url value="">
  <spring:param name="param3" value="value3" />
</spring:url>

produces ‘http://domain.com/page?param1=value1&param2=value2&param3=value3‘, but

<spring:url value="">
  <spring:param name="param2" value="value3" />
</spring:url>

produces ‘http://domain.com/page?param1=value1&param2=value3‘.

Is it possible to achieve?

Answer 1

Thе only solution that comes to my mind is to provide a collection of params and iterate through them ignoring params which must be substituted/ommited:

<spring:url value="">
  <spring:param name="param3" value="value3" />
  <c:forEach items="additionalParams" var="aParam">
    <c:if test="${aParam.name ne 'param3'}">
      <spring:param name="${aParam.name}" value="${aParam.value}" />
    </c:if>
  </c:forEach>
</spring:url>