工廠模式

package com.zyf.day27.fanshe;

import java.io.BufferedReader;
import java.io.FileReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;

/**
 * 
 * @author root
 *反射：
 */
public class demo1 {
    public static void main(String[] args) throws Exception {
        Person p = (Person) getInstance();
        System.out.println(p);
	}
    
    public static Object getInstance() throws  Exception{
    	BufferedReader bufferedReader = new BufferedReader(new FileReader("C:\\VM\\MapReduceWorkspace\\java\\src\\com\\zyf\\day27\\fanshe\\info.txt"));
    	
    	String className = bufferedReader.readLine();
    	
    	Class clazz = Class.forName(className);
    	
    	Constructor constructor = clazz.getDeclaredConstructor(null);
    	constructor.setAccessible(true);
    	Object o = constructor.newInstance(null);
    	
    	String line = null;
    	while((line = bufferedReader.readLine())!=null){
    		String[] datas = line.split("=");
    		Field field = clazz.getDeclaredField(datas[0]);
    		
    		field.setAccessible(true);
    		if(field.getType()==int.class){
    			field.set(o, Integer.parseInt(datas[1]));
    		}else{
    			field.set(o,datas[1]);
    		}
    	}
    	return o;
    }
}

com.zyf.day27.fanshe.Person
id=110
name=李四

package com.zyf.day27.fanshe;

public class Person {
    int id;
    String name;
    public Person(int id,String name){
    	this.id = id;
    	this.name = name;
    }
    
    public Person(){}
    
    public void eat(){
    	System.out.println(name + "吃很多飯");
    }
    
    @Override
    public String toString() {
    	// TODO Auto-generated method stub
    	return "編號：" + this.id + "姓名：" + this.name;
    }
}