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package org.artifact.core;


import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;

public class ConfigDemo {
    static ArrayList> field11 = new ArrayList>();
    static HashMap field12 = new HashMap();
    public static void main(String[] args) throws NoSuchFieldException {
        // 获取Class实例
        Class class1 = ConfigDemo.class;
        // 根据属性名取得该属性对应的Field对象
        Field mapField = class1.getDeclaredField("field12");
        // 示范第一个方法：直接通过getType()取出Field的类型，只对普通类型的Field有效
        Class class2 = mapField.getType();
        // 输出查看
        System.out.println("属性名为map的属性类型为："+class2);

        // 示范第二种方法：
        Type mapMainType = mapField.getGenericType();
        // 为了确保安全转换，使用instanceof
        if (mapMainType instanceof ParameterizedType) {
            // 执行强制类型转换
            ParameterizedType parameterizedType = (ParameterizedType)mapMainType;
            // 获取基本类型信息，即Map
            Type basicType = parameterizedType.getRawType();
            System.out.println("基本类型为："+basicType);
            // 获取泛型类型的泛型参数
            Type[] types = parameterizedType.getActualTypeArguments();
            for (int i = 0; i < types.length; i++) {
                System.out.println("第"+(i+1)+"个泛型类型是："+types[i]);
            }
        } else {
            System.out.println("获取泛型类型出错!");
        }
    }
}