Set ID of each line on a link in a dataTable

Answer 1

I am not sure of what you want to do at the end, but why don't you use a <h:commandLink> (that will generate a <a> HTML tag) instead (don't forget to nest your <h:datatable> in a <h:form>)?

<h:form id="myForm">
    ...
    <h:dataTable id="grid1" value="#{postControle.lista}" var="post1">
        ...
        <h:column>
            <f:facet name="header"><h:outputText style="float: left; font-weight: bold;" value="Opções"/></f:facet>
            <h:commandLink action="#{postControle.alterar}" value="Alterar"/>
            <h:commandLink action="#{postControle.consultar}" value="Consultar"/>
        </h:column>
    </h:dataTable>

Then, you define two actions in your Java bean (the String returned defines the navigation case to apply after the execution of the method):

public String alterar() {
    ...
}

public String consultar() {
    ...
}

And in each action method, you can retrieve the corresponding element (i.e. post1) using the getRowData() method of the HtmlDatatable component:

public String alterar() {
    HtmlDatatable table = (HtmlDatatable) FacesContext.getCurrentInstance().getViewRoot().findComponent("myForm:id1");
    YourClass element = (YourClass) table.getRowData();
    ...