反射—简单实例

package com.smart.practice1.models;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.UUID;

public class ReflectTest {

    public static void main(String[] arg) throws Exception {
        SysRoleInfo sysRoleInfo=init();
    }

    public static SysRoleInfo init() throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {

        //通过类装载器获取类对象
        ClassLoader loader=Thread.currentThread().getContextClassLoader();
        Class clazz=loader.loadClass("com.smart.practice1.models.SysRoleInfo");

        //获取类的默认构造器对象并通过实例化
        Constructor constructor=clazz.getDeclaredConstructor((Class[]) null);
        SysRoleInfo sysRoleInfo= (SysRoleInfo) constructor.newInstance();

        //通过反射方法设置属性值
        Method setUuid=clazz.getMethod("setUuid",String.class);
        setUuid.invoke(sysRoleInfo, UUID.randomUUID());
        return sysRoleInfo;
    }
}