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• Jsf File Converter
• Jsp To Pdf

In this article, we show you how to create a custom converter in JSF 2.0.

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Jsf File Converter

Steps
1. Create a converter class by implementing javax.faces.convert.Converter interface.
2. Override both getAsObject() and getAsString() methods.
3. Assign an unique converter ID with @FacesConverter annotation.
4. Link your custom converter class to JSF component via f:converter tag.

Custom converter example

A detail guide to create a JSF 2 custom converter name “URLConverter”, which is used to convert a String into an URL format (add HTTP protocol in front only :)) and store it into an Object.

1. Folder Structure

Folder structure of this example.

2. Converter class

Create a custom converter class by implementing javax.faces.convert.Converter interface.

Override following two methods :
1. getAsObject(), converts the given string value into an Object.
2. getAsString(), converts the given object into a String.

Assign an converter ID with @FacesConverter annotation.

See full custom converter source code :

URLConverter.java

In this custom converter class, it’s given a converter id as “com.mkyong.URLConverter“, and converts any given String (by adding a “http” in front) into “URLBookmark” object.

In addition, if URL validation is failed, return a FacesMessage object with declared error message.

URLBookmark.java

3. Managed Bean

A normal managed bean named “user”, nothing special here.

4. JSF Page

Link above custom converter to JSF component via “converterId” attribute in “f:converter” tag.

default.xhtml

result.xhtml

5. Demo

Enter a valid URL, without “http”.

Add a “http” in front of the valid URL and display it.

If an invalid URL is provided, return the declared error message.

Download Source Code

Jsp To Pdf

Reference