java - 从其他 Bean 填充一个 Bean

Question

我想从其他 bean 中填充 bean。

 Example:

 // this is mapped to db using hibernate.
 class A {
    string name;
    string age;
    Date dateA;
    B obj;
 }

 // this was mapped to db but now I'd like to populate it from class A member dateA;
 class B{
    Date date;
 }

当我尝试设置 B 对象时，出现 nullpointerException。知道如何处理这个问题吗？

Answer 1

Dozer 是一种 Java Bean 到 Java Bean 映射器，它将数据从一个对象递归复制到另一个对象。

Mapper mapper = new DozerBeanMapper();
DestinationObject destObject =  mapper.map(sourceObject, DestinationObject.class);

欲了解更多信息，请关注 Dozer .