import java.lang.reflect.Type;

import java.util.List;

import com.google.gson.Gson;

import com.google.gson.reflect.TypeToken;

/**

 * 用GSON解析Json数组

 */

public class GsonTest {

    public static void main(String[] args) {

        // Json数组最外层要加"[]"

        String jsonData = "[{'name':'John', 'grade':[{'course':'English','score':100},{'course':'Math','score':78}]},{'name':'Tom', 'grade':[{'course':'English','score':86},{'course':'Math','score':90}]}]";

        List<Student> students = GsonUtil.parseJsonArrayWithGson(jsonData,

                Student.class);

        System.out.println(students);

    }

}

/*

 * 封装的GSON解析工具类，提供泛型参数

 */

class GsonUtil {

    // 将Json数据解析成相应的映射对象

    public static <T> T parseJsonWithGson(String jsonData, Class<T> type) {

        Gson gson = new Gson();

        T result = gson.fromJson(jsonData, type);

        return result;

    }

    // 将Json数组解析成相应的映射对象列表

    public static <T> List<T> parseJsonArrayWithGson(String jsonData,

            Class<T> type) {

        Gson gson = new Gson();

        List<T> result = gson.fromJson(jsonData, new TypeToken<List<T>>() {

        }.getType());

        return result;

    }

}

class Student {

    private String name;

    private List<Grade> grade; // 因为grade是个数组，所以要定义成List

    public class Grade {

        private String course;

        private String score;

        public String getCourse() {

            return course;

        }

        public void setCourse(String course) {

            this.course = course;

        }

        public String getScore() {

            return score;

        }

        public void setScore(String score) {

            this.score = score;

        }

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public List<Grade> getGrade() {

        return grade;

    }

    public void setGrade(List<Grade> grade) {

        this.grade = grade;

    }

}