什么是默认的注释处理器发现过程? [英] What is the default annotation processors discovery process?

问题描述

Maven 编译器插件的文档提到以下内容:

The documentation of Maven Compiler plugin mentions the following:

annotationProcessors:

要运行的注释处理器的名称.仅适用于 JDK 1.6+ 如果不是设置，默认注释处理器发现过程适用.

Names of annotation processors to run. Only applies to JDK 1.6+ If not set, the default annotation processors discovery process applies.

这里的默认注释处理器发现过程是什么?除了这个配置标签，还有其他方法可以设置注解处理器吗?

What is the default annotation processors discovery process here? Is there any other way to set up annotation processors than this configuration tag?

我发现入门注释处理工具 (apt) 文档提到了一个默认发现过程，但它适用于工厂类而不是处理器，不幸的是它使用了 tools.jar 和 com.sun 来自 JDK 的包.这是默认的注释处理器发现过程吗?

I've found that the Getting Started with the Annotation Processing Tool (apt) documentation mentions a default discovery procedure, but it works with factory classes not processors and unfortunately it uses the tools.jar and com.sun packages from the JDK. Is this the default annotation processors discovery process?

推荐答案

使注释处理器对编译器可用的默认方法是将其注册到 META-INF/services/javax.annotation 中的文件中.processing.Processor.该文件可以包含多个处理器:每个处理器都在其自己的一行中，并在末尾有一个换行符.如果没有指定，编译器将默认使用以这种方式找到的处理器.

The default way to make an annotation processor available to the compiler is to register it in a file in META-INF/services/javax.annotation.processing.Processor. The file can contain a number of processors: each the fully-qualified class name on its own line, with a newline at the end. The compiler will default to using processors found in this way if none are specified.

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