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

java 浅拷贝，深度拷贝与属性复制

开源框架

An annotation processor for generating type-safe bean mappers

参考资料

Java的一个高性能快速深拷贝方法。Cloneable?

CGLIB中BeanCopier源码实现