Java 解析JSON数据

1.先下载 gson.jar.http://code.google.com/p/google-gson/downloads/list

2.解压后，把gson-2.2.2.jar 复制到  java项目的libs文件夹内 

Json数据：[{"name":"A","age":12},{"name":"B","age":14}]

    JsonReader reader = new JsonReader(new StringReader(jsonData));
        try {
            reader.beginArray();
            while (reader.hasNext()) {
                reader.beginObject();
                while (reader.hasNext()) {
                    String tagNameString = reader.nextName();
                    if(tagNameString.equals("name")){
                        System.out.print("name--->"+reader.nextString());
                    }
                    else if(tagNameString.equals("age")){
                        System.out.print("age--->"+reader.nextInt());
                    }
                }
                reader.endObject();
            }
            reader.endArray();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 

 方式二：通过类对象

public class User {
    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    private int age; 
}

　　　　 Type listType = new TypeToken<LinkedList<User>>(){}.getType();
        Gson gson = new Gson();
        LinkedList<User> users = gson.fromJson(jsonData,listType);
        for(int i =0;i<users.size();i++){
            User user = users.get(i);
            System.out.println("name--->"+user.getName());
        }