JSON数据转换成Java对象的方法

package com.mycompany.gsondata; 
import com.google.gson.JsonArray; 
import com.google.gson.JsonObject; 
import com.google.gson.JsonParser; 

/**
 * Hello world!
 *
 */ 
public class App { 

    public static void main(String[] args) { 
        String jsonData = "{\"questionnaireID\": \"QNTest\",\"answerResults\":[{\"questionID\":\"QSTest01\",\"anserContent\":\"cfb7f441-9086-11e3-8cf8-000c2945c442\"},{\"questionID\":\"QSTest01\",\"anserContent\":\"cfb7f441-9086-11e3-8cf8-000c2945c442\"},{\"questionID\":\"QSTest03\",\"anserContent\":\"6b3a9cce-9087-11e3-8cf8-000c2945c442,a086331d-9087-11e3-8cf8-000c2945c442\"},{\"questionID\":\"QSTest01\",\"anserContent\":\"cfb7f441-9086-11e3-8cf8-000c2945c442\"},{\"questionID\":\"QSTest05\",\"anserContent\":\"test测试文字填空\"},{\"questionID\":\"QSTest06\",\"anserContent\":\"3\"},{\"questionID\":\"QSTest07\",\"anserContent\":\"2.2\"}]}"; 
        JsonObject root = new JsonParser().parse(jsonData).getAsJsonObject(); 
        System.out.println(root.get("questionnaireID").toString());//直接取的根节点值 

        JsonArray AnswerList = root.getAsJsonArray("answerResults");//取数组 

        for (int i = 0; i < AnswerList.size(); i++) { 
            System.out.println(AnswerList.get(i).getAsJsonObject().get("questionID").toString()); 
            System.out.println(AnswerList.get(i).getAsJsonObject().get("anserContent").toString()); 
        } 

    } 
}