java 反射 ， 判断Class是否是某个类的子类或父类 .
package com.zf.target; import java.lang.reflect.Field;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import java.util.List;import java.util.Map; class T{List<A> a;List<B> b;//List l ;Map<Integer, String> map ;int c;} class A {}class B{} public class Test9{ public static void main(String[] args) {Class tc = T.class;Field[] fields = tc.getDeclaredFields();for (Field f : fields) {Class fc = f.getType();if(fc.isPrimitive()){System.out.println("基本数据类型： " + f.getName() + " " + fc.getName());}else{if(fc.isAssignableFrom(List.class)){ //判断是否为ListSystem.out.println("List类型：" + f.getName());Type gt = f.getGenericType();//得到泛型类型ParameterizedType pt = (ParameterizedType)gt;Class lll = (Class)pt.getActualTypeArguments()[0];System.out.println("\t\t" + lll.getName());}}}}}
