javaSE注解和反射之获取类的运行时结构

package 反射;

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

public class 获取类的运行时结构 {

    public static void main(String[] args) throws Exception {

        Class c1= Class.forName("反射.pojo.User");

        //获取类的名字

        String name1 = c1.getName();
        String SimpleName = c1.getSimpleName();

        System.out.println(name1);
        System.out.println(SimpleName);

        //获取类的属性

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

        Field[] fields1=c1.getFields();//只能找到public属性

        for (Field field : fields1) {
            System.out.println(field);
        }

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

        Field[] fields2=c1.getDeclaredFields();

        for (Field field : fields2) {
            System.out.println(field);
        }

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

        //获取类的方法

        System.out.println("===============================");
        //获取本类及其父类的全部public
        Method[] methods1 = c1.getMethods();
        for (Method method : methods1) {
            System.out.println(method);
        }

        System.out.println("================================");
        //获取本类的所有方法
        Method[] methods2 = c1.getDeclaredMethods();
        for (Method method : methods2) {
            System.out.println(method);
        }

        //获取指定方法

        Method getName = c1.getMethod("getName", null);

        Method setName = c1.getMethod("setName", String.class);

        System.out.println(getName);
        System.out.println(setName);

        //获得指定的构造器

        Constructor[] constructors = c1.getConstructors();

        for (Constructor constructor : constructors) {
            System.out.println(constructor);
        }

        Constructor[] declaredConstructors = c1.getDeclaredConstructors();

        for (Constructor declaredConstructor : declaredConstructors) {
            System.out.println("#"+declaredConstructor);
        }

        //获得指定的构造器

        Constructor constructor = c1.getDeclaredConstructor(String.class, String.class, int.class);

        System.out.println(constructor);


    }

}