另一个是Orika - https://github.com/orika-mapper/orika

Orika is a Java Bean mapping framework that recursively copies (among other capabilities) data from one object to another. It can be very useful when developing multi-layered applications. Orika focuses on automating as much as possible, while providing customization through configuration and extension where needed. Orika enables the developer to : Map complex and deeply structured objects "Flatten" or "Expand" objects by mapping nested properties to top-level properties, and vice versa Create mappers on-the-fly, and apply customizations to control some or all of the mapping Create converters for complete control over the mapping of a specific set of objects anywhere in the object graph--by type, or even by specific property name Handle proxies or enhanced objects (like those of Hibernate, or the various mock frameworks) Apply bi-directional mapping with one configuration Map to instances of an appropriate concrete class for a target abstract class or interface Handle reverse mappings Handle complex conventions beyond JavaBean specs. Orika uses byte code generation to create fast mappers with minimal overhead.

另一个是Orika - https://github.com/orika-mapper/orika

Orika is a Java Bean mapping framework that recursively copies (among other capabilities) data from one object to another. It can be very useful when developing multi-layered applications. Orika focuses on automating as much as possible, while providing customization through configuration and extension where needed. Orika enables the developer to : Map complex and deeply structured objects "Flatten" or "Expand" objects by mapping nested properties to top-level properties, and vice versa Create mappers on-the-fly, and apply customizations to control some or all of the mapping Create converters for complete control over the mapping of a specific set of objects anywhere in the object graph--by type, or even by specific property name Handle proxies or enhanced objects (like those of Hibernate, or the various mock frameworks) Apply bi-directional mapping with one configuration Map to instances of an appropriate concrete class for a target abstract class or interface Handle reverse mappings Handle complex conventions beyond JavaBean specs. Orika uses byte code generation to create fast mappers with minimal overhead.

你可以试试Dozer。

Dozer是一个Java Bean到Java Bean的程序 递归复制数据的映射器 从一个物体到另一个物体。通常情况下, 这些Java bean将是不同的 复杂类型。 Dozer支持简单属性 映射，复杂类型映射， 双向映射, 隐式-显式映射，以及 递归的映射。这包括 映射集合属性 还需要在元素处进行映射 的水平。

我的ModelMapper是另一个值得一试的库。ModelMapper的设计不同于其他库，因为它:

通过智能匹配源和目标属性自动映射对象模型 提供一个重构安全映射API，使用实际代码来映射字段和方法，而不是使用字符串 利用基于约定的配置来简单处理自定义场景

查看ModelMapper网站以获取更多信息:

http://modelmapper.org

还有一个Java映射引擎/框架Nomin: http://nomin.sourceforge.net。

我很高兴添加Moo作为一个选项，尽管很明显我对它有偏见: http://geoffreywiseman.github.com/Moo/

它在简单的情况下很容易使用，在更复杂的情况下也很有能力，尽管我仍然可以想象在一些方面对它进行进一步的改进，以解决更复杂的问题。