常见的属性赋值工具
Frameworks that ease bean mapping.
dOOv - Provides fluent API for typesafe domain model validation and mapping. It uses annotations, code generation and a type safe DSL to make bean validation and mapping fast and easy.
Dozer - Mapper that copies data from one object to another using annotations and API or XML configuration.
JMapper - Uses byte code manipulation for lightning-fast mapping. Supports annotations and API or XML configuration.
MapStruct - Code generator that simplifies mappings between different bean types, based on a convention-over-configuration approach.
ModelMapper - Intelligent object mapping library that automatically maps objects to each other.
Orika - JavaBean-mapping framework that recursively copies (among other capabilities) data from one object to another.
Selma - Annotation processor-based bean mapper.
参见项目 awesome-java
个人整理
我原来(2018年)对比过这些工具，Dozer 是相对比较成熟的工具。
对于性能而言，直接通过 CGLIB 生成的 BeanCopier 性能比较好。
如何自定义一个自己的属性赋值工具？
满足常见的 BeanUtils.copyProperties(); 的便利性
可以指定 null 值是否赋值等等。
自己设计一个属性赋值框架。
拓展阅读
开源框架
An annotation processor for generating type-safe bean mappers
