Wednesday, December 20, 2006

Calling Servlets from JSF

Another point I struggled with is calling servlets from JSF. Here is a simple example.

This is the bean which is called from .jsp page
import javax.faces.context.FacesContext;

public class ServletTest {

    public void doThis(){
    String url = "url of your servlet";
    FacesContext context = FacesContext.getCurrentInstance();
    try {
    }catch (Exception e) {

This is the .jsp page

<h:form id="myForm">
<h:commandButton value="Do" action="#{ServletTest.doThis}" />

Saturday, December 02, 2006

Parameter passing in JSF

My part of the interns' project is to develop a web portal using JSF. However I'm new to JSF and have to search and learn. The hardest point I struggled with is passing parameters to the backing bean from the UI. I was stuck a whole day on this. Finally I got it and I'm wondering how hard this simple thing to be found and this is that.

    <h:commandButton value="Show" actionListener="#{MyBean.setStr}" action="#{MyBean.go}" >
        <f:attribute name="name" value="Hello"/>

public class MyBean {
    private String str;
    public void setStr(ActionEvent event){
        String name = (String) event.getComponent().getAttributes().get("name");

    public String go(){
        return ("success");

This may help those who are new to JSF like me:)

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