javascript提交到jsf

点击一个区域，提交到jsf bean。

<div class="grida">   
    <div class="category" οnclick="document.getElementById('categoty_filter_form:aa:#{status.index}:abutton').click()">
        <p>#{category.name}</p>
        <h:commandLink id="abutton" action="#{categoryController.print()}" >
            <f:param name="category" value="#{category.name}" />
        </h:commandLink>
        <canvas id="grida_#{status.index}" class="category_type_#{category.type}" width="40" height="20" style="border:0px solid #000000;">
        </canvas>
    </div>
</div>

后台是

public void print(){
    System.out.println(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("category"));
}