将JSON文本从浏览器发送到JSF托管Bean(Primefaces) [英] Sending JSON text from Browser to JSF Managed Bean (Primefaces)

问题描述

我正在开发一个应用程序，正在考虑将信息以JSON格式发送回浏览器，并让Java脚本根据该信息呈现页面.我想以同样的方式将更新从浏览器以JSON格式推送到托管bean.我们可以在JSF + Primefaces中完成此任务吗?

I am working on a app where I am thinking of sending information back to the browser in JSON format and have java script render the page based on the information. In the same fashion, I want to push updates from the browser to the managed bean in JSON format. Can we accomplish this in JSF + Primefaces?

我们考虑使用JSON的原因是为了限制来回传递的数据量.

The reason we are thinking of using JSON is to limit the amount of data being passed back and forth.

推荐答案

我可以推荐使用Gson Gson用户指南

I can recommend on using Gson Gson User Guide

这是一个简短示例，说明如何从服务器创建/发送/解析json

Here is a brief example of how create/send/parse json from server

在您的bean中做这样的事情

in your bean do something like this

Gson gson = new Gson();
myJsonString = gson.toJson(someObjectOrListOfObjects);

在xhtml中

<h:inputHidden id="my_json_data" value="#{myBean.someObjectOrListOfObjects}" />

在您的js文件中

var data = $('input[id$="my_json_data"]').val();
data = jQuery.parseJSON(data); //to parse it, use dev tools/fire bug to add data variable to watch and observe it

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