If your answer is yes to the following questions then you can use annotations in your project.
1.Do you have the flexibility to use Java 5 Environment? 2.Do you have the knowledge of which production database you are going to use?
If yes, you can use annotations, this brings in strong coupling. Inorder to support multiple databases, it is better to have the mapping
information in a seperate xml file rather than using annotations. You can easily have multiple xml files each specific for a particular database rather than having a different sets of source codes.
本文探讨了在软件项目中使用注解的条件，包括Java环境的要求及对生产数据库的选择。作者建议，在能够灵活选择Java 5环境并明确将使用的生产数据库时采用注解；而为了支持多种数据库，则推荐使用XML文件进行映射配置。
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