三种格式文件比较 .properties .conf .json

The three file formats each have advantages.

• Java .properties:
  • Java standard, built in to JVM
  • Supported by many tools such as IDEs
• JSON:
  • easy to generate programmatically
  • well-defined and standard
  • bad for human maintenance, with no way to write comments, and no mechanisms to avoid duplication of similar config sections
• HOCON/.conf:
  • nice for humans to read, type, and maintain, with more lenient syntax
  • built-in tools to avoid cut-and-paste
  • ways to refer to the system environment, such as system properties and environment variables

The idea would be to use JSON if you're writing a script to spit out config, and use HOCON if you're maintaining config by hand. If you're doing both, then mix the two.