> For the complete documentation index, see [llms.txt](https://hantsy.gitbook.io/java-ee-8-by-example/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hantsy.gitbook.io/java-ee-8-by-example/jsf/jsf-compatible-mode.md).
# Run applications in JSF 2.2 compatible mode
For those not ready for new CDI activation, JSF 2.3 provides a compatible mode to make your codes working seamlessly with a JSF 2.2 *faces-config.xml*.
In contrast with the former JSF 2.3 configuration, we should perform some modification here.
1. Use a 2.2 versioned *faces-config.xml* instead.
```markup
```
2. Declare a *beans.xml*, CDI is enabled by default in Java EE 7, so it is **optional**.
```markup
```
3. Add 3.1 versioned *web.xml*. It is **optional**, but the compatible mode only works with 3.1, does not work with a 4.0 versioned *web.xml*.
```markup
```
4. Remove the `@FacesConfig` annotated class, it is only for JSF 2.3.
Done.
Now create a simple sample to try it.
Firstly create a simple backing bean.
```java
@Named
@RequestScoped
public class HelloBean {
private String message;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public void sayHi() {
this.message = "Greeting at " + LocalDateTime.now();
}
@Override
public int hashCode() {
int hash = 7;
hash = 13 * hash + Objects.hashCode(this.message);
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final HelloBean other = (HelloBean) obj;
if (!Objects.equals(this.message, other.message)) {
return false;
}
return true;
}
}
```
And a simple Facelets template.
```markup
Hello JSF 2.3(JSF 2.2 Compatible Mode)
```
In NetBeans IDE, run it on Glassfish directly, finally it will open the home page.
Get the [source codes](https://github.com/hantsy/ee8-sandbox/tree/master/jsf-compatible-mode-jsf22) from my GitHub account.