My JSF Books/Videos My JSF Tutorials OmniFaces/JSF PPTs
JSF 2.3 Tutorial
JSF Caching Tutorial
JSF Navigation Tutorial
JSF Scopes Tutorial
JSF Page Author Beginner's Guide
OmniFaces 2.3 Tutorial Examples
OmniFaces 2.2 Tutorial Examples
JSF Events Tutorial
OmniFaces Callbacks Usages
JSF State Tutorial
JSF and Design Patterns
JSF 2.3 New Features (2.3-m04)
Introduction to OmniFaces
25+ Reasons to use OmniFaces in JSF
OmniFaces Validators
OmniFaces Converters
JSF Design Patterns
Mastering OmniFaces
Reusable and less-verbose JSF code

My JSF Resources ...

Java EE Guardian
Member of JCG Program
Member MVB DZone
Blog curated on ZEEF
OmniFaces is an utility library for JSF, including PrimeFaces, RichFaces, ICEfaces ...

[OmniFaces Utilities] - Find the right JSF OmniFaces 2 utilities methods/functions

Search on blog

Petition by Java EE Guardians


joi, 23 aprilie 2015

[OmniFaces utilities (2.0)] Encode the given Map as JSON

[OmniFaces utilities] The encode() method encodes the given object as JSON. This supports the standard types Boolean, Number, CharSequence and Date. If the given object type does not match any of them, then it will attempt to inspect the object as a java bean whereby the public properties (with public getters) will be encoded as a JS object. It also supports Collections, Maps and arrays of them, even nested ones. The Date is formatted in RFC 1123 format, so you can if necessary just pass it straight to new Date() in JavaScript.

Read more:

For example, suppose we have the following bean:

import java.util.Date;
public class Player {

 private Boolean righthanded;
 private String name;
 private Integer age;
 private Date birthdate;

 public Player(Boolean righthanded, String name, Integer age, Date birthdate) {
  this.righthanded = righthanded; = name;
  this.age = age;
  this.birthdate = birthdate;
 // getters and setters

And, we define a Map of Players:

Map<String, Player> players = new HashMap<>();
players.put("1", new Player(false, "Rafael Nadal", 28, new Date()));
players.put("2", new Player(true, "Novak Djokovic", 27, new Date()));
players.put("3", new Player(true, "Andy Murray", 27, new Date()));

Now we can encode the players map into a JSON object:

import org.omnifaces.util.Json;
String jsonPlayers = Json.encode(players);

JSON-encoded representation of the given object will be:

{"1":{"age":28,"birthdate":"Thu, 23 Apr 2015 13:09:02 GMT","name":"Rafael Nadal","righthanded":false},"2":{"age":27,"birthdate":"Thu, 23 Apr 2015 13:09:02 GMT","name":"Novak Djokovic","righthanded":true},"3":{"age":27,"birthdate":"Thu, 23 Apr 2015 13:09:02 GMT","name":"Andy Murray","righthanded":true}}

Or, nicely formatted:
Note  Behind the scene, Json#encode() will use:
·         Json#encodeMap() - since players is a Map
·         Json#encodeBean() - since players contains instances of the Player bean
·         the supported Java standard types - since Player bean contains properties of Java standard types

Niciun comentariu :

Trimiteți un comentariu


Postări populare

OmniFaces/JSF Fans

Follow by Email

Visitors Starting 4 September 2015

Locations of Site Visitors