如何构建一个objectmapper来处理json对象

I'm new to the whole concept of REST and mapping json into a Java Object. I know that I need to create a class file that the object mapper uses to create the Java object. The json below is what is top end returned from WeatherUnderground using a resttemplate. To me, it appears to be an array of objects and I am only interested at the moment in the current_observation and the display_location objects. It also appears to have several objects imbedded in other objects. I'm new to the whole concept of REST and mappin