采用Java的反射机制编写的克隆类以及方法的代码

package reflection;public class Customer {private Long id;private String name;private int age;public Customer() {}public Customer(String name, int age) {this.name = name;this.age = 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;}}

 

 

package reflection;import java.lang.reflect.Field;import java.lang.reflect.Method;public class ReflectionCopy {public static void main(String[] args) throws Exception {Customer customer=new Customer("linwei",24);customer.setId(new Long(1));Customer customerCopy = (Customer)new ReflectionCopy().copy(customer);System.out.println("这个是COPY之后的对象: " + customerCopy);System.out.println("这个是COPY之后的对象: customerCopy.getAge() is " + customerCopy.getAge());System.out.println("这个是COPY之后的对象: customerCopy.getName() is " + customerCopy.getName());System.out.println("这个是COPY之后的对象: customerCopy.getId() is " + customerCopy.getId());}public Object copy(Object object) throws Exception {//获得对象的类型Class classType = object.getClass();System.out.println("对象的名字是: " + classType.getName());System.out.println("对象的类型是: " + classType.getClass());//通过默认构造方法创建一个新的对象Object objectCopy = classType.getConstructor(new Class[]{}).newInstance(new Object[]{});//获得对象的所有属性//Field fields[] = classType.getFields();Field fields[] = classType.getDeclaredFields();for(int i=0;i<fields.length;i++) {Field newField = fields[i]; String fieldName=newField.getName();String firstLetter=fieldName.substring(0,1).toUpperCase();//获得和属性对应的getXXX()方法的名字String getMethodName="get"+firstLetter+fieldName.substring(1);//获得和属性对应的setXXX()方法的名字String setMethodName="set"+firstLetter+fieldName.substring(1);//下面是组装对应的get/set方法Method getMethod = classType.getMethod(getMethodName, new Class[]{});Method setMethod = classType.getMethod(setMethodName, new Class[]{newField.getType()});//调用原对象的get方法Object value = getMethod.invoke(object, new Object[]{});System.out.println("value is: " + value);//调用赋值对象的set方法setMethod.invoke(objectCopy, new Object[]{value});}return objectCopy;}}