How to parse JSON in Java

I have the following JSON text. How can I parse it to get
the values of pageName, pagePic,
post_id,
etc.?

{
 "pageInfo":
            {
 "pageName": "abc",
 "pagePic":
            "http://example.com/content.jpg"
 },
 "posts": [

            {
 "post_id": "123456789012_123456789012",

 "actor_id":
            "1234567890",
 "picOfPersonWhoPosted":
            "http://example.com/photo.jpg",
 "nameOfPersonWhoPosted": "Jane
            Doe",
 "message": "Sounds cool. Can't wait to see it!",

            "likesCount": "2",
 "comments": [],
 "timeOfPost":
            "1234567890"
 }

            ]
}