例子：
public class Outbound2splitVO implements Serializable ,Cloneable {
    private long id;
    private String brand;
    public long getId() {
        return id;
    }
    public void setId(long id){
        this.id=id;
    }
    public void setBrand(String brand) {
        this.brand=brand;
    }
    public String getBrand(){
        return brand;
    }

    public Object clone(){
          Outbound2splitVO o = null;
          try{
              o = (Outbound2splitVO)super.clone();
          }catch(CloneNotSupportedException e){
              e.printStackTrace();
          }
          return o;
      }
}

类必须实现Cloneable接口，clone方法。