JAVA反射机制实现复制一个对象

1.JAVA中无论生成一个类的多少个对象，这些对象都会对应同一个Class对象.
2.获取某个类或对象所对应的Class对象的常用的3种方式：
   a.使用Class类的静态方法forName,Class.forName("java.lang.String");
   b.使用.class语法：String.class;
   c.使用对象的getClass()方法: String s = "aa"; Class<?> clazz = s.getClass();
3.若想通过类的不带参数的构造方法来生成对象，我们有两种方式：
   a.先将获得Class对象，然后通过该Class对象的newInstance()方法直接生成即可：Class<?> classType = String.class;Object obj = classType.newInstance();
   b.先获得Class对象，然后通过该对象获得对应的Constructor对象，
在通过该Constructor对象的newInstance()方法生成

package com.jelly.reflect;

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

/**
 * JAVA反射技术
 * 
 * @author Jelly QQ:136179492
 * 
 */
public class ReflectTester {
	/**
	 * 通过一个对象利用反射技术将其复制
	 * 
	 * @param 参数object
	 * @return 复制的Object对象
	 * @throws Exception
	 */
	public Object copy(Object object) throws Exception {
		Class<?> classType = object.getClass();
		Object obj = classType.getConstructor(new Class[] {}).newInstance(
				new Object[] {});
		Field[] fields = classType.getDeclaredFields();
		for (Field field : fields) {
			String name = field.getName();
			String firstLetter = name.substring(0, 1).toUpperCase();
			String getMethodName = "get" + firstLetter + name.substring(1);
			String setMethodName = "set" + firstLetter + name.substring(1);
			Method getMethod = classType.getMethod(getMethodName,
					new Class[] {});
			Method setMethod = classType.getMethod(setMethodName,
					new Class[] { field.getType() });
			Object value = getMethod.invoke(object, new Object[] {});
			System.out.println(value);
			setMethod.invoke(obj, new Object[] { value });
		}
		return obj;
	}

	public static void main(String[] args) throws Exception,
			InvocationTargetException {
		ReflectTester test = new ReflectTester();
		Customer customer = new Customer("jelly", 23);
		Customer obj = (Customer) test.copy(customer);
		System.out.println(obj.getName() + obj.getAge());
	}
}

class Customer {
	public Customer() {

	}

	public Customer(String name, int age) {
		this.name = name;
		this.age = age;
	}

	private long id;
	private String name;
	private int age;

	public long getId() {
		return id;
	}

	public void setId(long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

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

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
}