Gson 入门笔记

#本文只是一个简单的实例，自己总结所用。如果需要详细的资料，请参考Gson API文档

最近项目里涉及到不同语言之间接口的调用，最后选择Json作为数据格式。在Java，选择了Google的Gson。我也不知道为什么。

先定义测试类：

简单说明：一个Peope类，一个Friend类。Friend继承People

class People{
	public People(){}
	
	String Name;
	String Age;
	String Sex;
	public String getName() {
		return Name;
	}
	public void setName(String name) {
		Name = name;
	}
	public String getAge() {
		return Age;
	}
	public void setAge(String age) {
		Age = age;
	}
	public String getSex() {
		return Sex;
	}
	public void setSex(String sex) {
		Sex = sex;
	}
	
	ArrayList<Friend> friends;
	public ArrayList<Friend> getFriends() {
		return friends;
	}
	public void setFriends(ArrayList<Friend> friends) {
		this.friends = friends;
	}
	
	
}

class Friend extends People{
	Boolean IsGrilFriend;

	public Boolean getIsGrilFriend() {
		return IsGrilFriend;
	}

	public void setIsGrilFriend(Boolean isGrilFriend) {
		IsGrilFriend = isGrilFriend;
	}
}

测试代码：

/**
	 * @param args
	 */
	public static void main(String[] args) {
		People people = new People();
		people.setName("Tom");
		people.setAge("12");
		people.setSex("男");
		
		ArrayList<Friend> _Friends = new ArrayList<Friend>();
		Friend _Friend = new Friend();
		_Friend.setName("Shit");
		_Friend.setAge("11");
		_Friend.setSex("男");
		_Friend.setIsGrilFriend(true);
		_Friends.add(_Friend);
		
		
		people.setFriends(_Friends);
		
		
		Gson gson = new GsonBuilder().create();
		
		
		long Time1 = System.currentTimeMillis();
		String sResultString = gson.toJson(people,people.getClass());
		long Time2 = System.currentTimeMillis();
		
		System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
		
		System.out.println(sResultString);
		System.out.println("所使用时间:"+(Time2-Time1));
		
		System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
		
		Time1 = System.currentTimeMillis();
		People _Peoples = gson.fromJson(sResultString,people.getClass());
		Time2 = System.currentTimeMillis();
		
		System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
		
		System.out.println(_Peoples.friends.size());
		System.out.println("所使用时间:"+(Time2-Time1));
		
		System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++");
		

	}

注：声明Gson对象的两种方式：

		Gson gson = new GsonBuilder().create();
		Gson gson = new Gson();

结果：

+++++++++++++++++++++++++++++++++++++++++++++++++
{"Name":"Tom","Age":"12","Sex":"男","friends":[{"IsGrilFriend":true,"Name":"Shit","Age":"11","Sex":"男"}]}
所使用时间:110
+++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++
1
所使用时间:11
+++++++++++++++++++++++++++++++++++++++++++++++++

好了，也没什么好介绍的，只是入门而已，就写到这吧。