Introduction - If you have any usage issues, please Google them yourself
This a front-end back-end interaction through JQuery s getJSON function json data examples.
The front page is front.html, back-end processing module is back.jsp
The back.jsp, front.html and jquery-1.8.3.min.js deployed in Tomcat webapps of ROOT, through the browser, enter: http://xxx.xxx.xxx.xxx:xxxx/front. html way to access front.html, there are two buttons on the page, one is submitted, the system will be to guide and refresh the page returned to the way another json data, a check, the system will not refresh the entire page and return json data.