获得类的运行时结构

获取运行时类的完整结构

package com.guo.reflection;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

//获得类的信息
public class Test08 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, NoSuchMethodException {

        Class c1 = Class.forName("com.guo.reflection.User");


        //获得类的名字
            //包名+类名
        System.out.println(c1.getName());  //com.guo.reflection.User
            //类名
        System.out.println(c1.getSimpleName());  //User

        //获得类的属性
        System.out.println("=============================");

        Field[] fields = c1.getFields(); //只能找到public属性
        for (Field field : fields) {
            System.out.println(field);
        }

        fields = c1.getDeclaredFields(); //找到全部属性
        for (Field field : fields) {
            System.out.println(field);
        }
        System.out.println("=====================");

        //获得指定属性的值
        Field name = c1.getDeclaredField("name");
        System.out.println(name);
        System.out.println("=======================");

        //获得类的方法
        Method[] methods = c1.getMethods();  //获得本类及其父类的全部方法
        for (Method method : methods) {
            System.out.println("正常的"+method);
        }

        System.out.println("=======================");

        methods = c1.getDeclaredMethods();  //获得本类的全部方法
        for (Method method : methods) {
            System.out.println("本类的"+method);
        }
        System.out.println("======================");


        //获得指定的方法
        //方法的重载------>需要传入参数类型
        Method getName = c1.getMethod("getName",null);
        Method setName = c1.getMethod("setName",String.class);
        System.out.println(getName);
        System.out.println("======================");
        System.out.println(setName);
        System.out.println("======================");

        //获得构造器
        Constructor[] constructors = c1.getConstructors();
        for (Constructor constructor : constructors) {
            System.out.println(constructor);
        }
        System.out.println("========================");
        constructors = c1.getDeclaredConstructors();
        for (Constructor constructor : constructors) {
            System.out.println("#"+constructor);
        }
        System.out.println("========================");


        //获得指定的构造器
        Constructor declaredConstructor = c1.getDeclaredConstructor(String.class, int.class, int.class);
        System.out.println("指定的"+declaredConstructor);


    }
}