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上一节我们学习了XML文件的解析,接下来我们再了解JSON文件的解析。在Libgdx中也提供了Json类来帮助我们解析文件,最常用的方法是fromJson(java.lang.Class type, FileHandle file) 通过此方法我们必须先定义一个内部类来抽象的表示Json文件。
{
"name": "David",
"experience": 2534,
"strength": 6,
"dexterity": 8,
"intelligence": 6,
"items" : [
{ name: "iron-sword", number: 1 },
{ name: "wooden-shield", number: 1 },
{ name: "leather-armor", number: 1 },
{ name: "leather-boots", number: 1 },
{ name: "healing-potion", number: 3 },
{ name: "poison-herbs", number: 2 }
]
}
上面的Json文件我们可以看出,Json文件中包含对象name, experience, strength, dexterity, dexterity, intelligence, items, 共7个属性,因此我们需要定义一个Charactor.class类来容纳这7个属性。 同时我们可以知道items包含2个属性: name, number,因此我们需要定义一个类Item.class来容纳这7个属性。
下面是具体的代码实现:
public class JsonTest extends ApplicationAdapter {
@Override
public void create() {
Json json = new Json();
json.setElementType(Character.class, "items", Item.class); // 指定Character中的item数据类型
Character character = json.fromJson(Character.class, Gdx.files.internal("character.json")); // 从Json文件中创建一个Charactor对象
System.out.println(character);
// System.out.println("dexterity: " + character.dexterity); // 访问单个属性,需要建立对应的class
System.out.println();
System.out.println("=====================");
System.out.println("Serializing character");
System.out.println("=====================");
System.out.println(json.prettyPrint(json.toJson(character)));
}
public static class Item {
private String name;
private int number;
@Override
public String toString() {
return name + "(" + number + ")";
}
}
public static class Character {
private String name = "";
private int experience = 0;
private int strength = 1;
private int dexterity = 1;
private int intelligence = 1;
public Array<Item> items = new Array<Item>();
@Override
public String toString() {
String string = new String();
string += "Name: " + name + "\n";
string += "Experience: " + experience + "\n";
string += "Strength: " + strength + "\n";
string += "Dexterity: " + dexterity + "\n";
string += "Intelligence: " + intelligence + "\n";
string += "Items: ";
for (Item item : items) {
string += item.toString() + " ";
}
return string;
}
}
}
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原文地址:http://blog.csdn.net/zqiang_55/article/details/51884239