JAVA反射demo

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import java.lang.reflect.Field;

 

public class CloneUtils {

 

     private static final Class<?>[] BASE_CLASSES = {Integer. class ,String. class , Double. class , Float. class ,

                                                     Boolean. class ,Character. class , Long. class , Short. class , Byte. class };

     

     @SuppressWarnings ( "unchecked" )

     public static <T> T deepClone(T t) throws  Exception{

         Class<T> clazz =(Class<T>) t.getClass();

         T result = clazz.newInstance();

         Field[] fields = clazz.getDeclaredFields();

         for (Field field :fields){

             field.setAccessible( true );

             if (!isBaseClass(field.getType()))

                 field.set(result, deepClone(field.get(t)));

             else field.set(result, field.get(t));   

         }

         return  result;

     }

     private static boolean isBaseClass(Class<?> clazz) {

             for (Class<?> cc : BASE_CLASSES)

                 if (cc.equals(clazz)) 

                     return true ; 

             return false ; 

     }

 

     public static void main(String[] args) throws Exception{

         

         Person p = new Person( "xiaoming" , "nan" );

         IDCard idCard = new IDCard( 11111 , "xx市" );

         p.setIdCard(idCard);

         Person pc = deepClone(p);

         System.out.println(pc.getName());

         

     }

     

}

class Person{

     private String name;

     private String sex;

     private IDCard idCard;

     public IDCard getIdCard() {

         return idCard;

     }

     public void setIdCard(IDCard idCard) {

         this .idCard = idCard;

     }

     Person(){

         

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this .name = name;

     }

     public String getSex() {

         return sex;

     }

     public void setSex(String sex) {

         this .sex = sex;

     }

     Person(String _name,String _sex){

         this .name = _name;

         this .sex  = _sex;

     }

     

     

}

class IDCard {

 

     private Long id;

     private String address;

     public long getId() {

         return id;

     }

     public void setId( long id) {

         this .id = id;

     }

     public String getAddress() {

         return address;

     }

     public void setAddress(String address) {

         this .address = address;

     }

     public IDCard(){

         

     }

     public IDCard( long id, String address) {

         super ();

         this .id = id;

         this .address = address;

     }

}

转载于:https://my.oschina.net/leejayblog/blog/291775