package com.shrimpking.t6;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/12 18:06
 */
public class Person
{
    private String name;

    public Person(){
        this("匿名构造");
    }

    public Person(String name){
        this.name = name;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public void run(int meters){
        System.out.printf("%s跑了%d米",this.name,meters);
    }

    @Override
    public String toString()
    {
        return "Person{" + "name='" + name + '\'' + '}';
    }

    private void helper(){
        System.out.println("私有辅助方法");
    }
}
package com.shrimpking.t6;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/12 18:09
 */
public class ObjectFactory
{
    public static void main(String[] args)
    {
//        if(args.length < 1){
//            System.exit(1);
//        }

        String[] params = new String[2];
        params[0] = "com.shrimpking.t6.Person";
        params[1] = "zhang";

        try
        {
            Class<?> clz = Class.forName(params[0]);

            //获取无参的构造方法
            Constructor noArgsCons = clz.getConstructor();
            Object obj = noArgsCons.newInstance();
            System.out.println(clz);
            System.out.println(obj);

            if(params.length > 1){
                Class paramClz = params[1].getClass();
                //得到一个参数的有参构造
                Constructor oneArgCons = clz.getConstructor(paramClz);
                obj = oneArgCons.newInstance(params[1]);
                System.out.println(paramClz);
                System.out.println(obj);
            }

        }catch (ClassNotFoundException
                | NoSuchMethodException
                | InstantiationException
                | IllegalAccessException
                | InvocationTargetException e){
            System.out.println(e.toString());
        }
    }
}