java APT（注释处理工具）
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APT (Annotation Processing Tool)
提问by Nuwan Arambage
I was trying to find simple example to understand the usage of apt command, but I couldn't find a helpful resource for this.
我试图找到简单的例子来理解 apt 命令的用法，但我找不到有用的资源。
I have referred this Getting Started with the Annotation Processing Tool but I do get a high level understanding. Moreover I want to write a code to test apt command. Can somebody post a simple example or better link to refer?
我已经参考了注释处理工具入门，但我确实得到了高层次的理解。此外，我想编写一个代码来测试 apt 命令。有人可以发布一个简单的例子或更好的链接来参考吗？
回答by kschneid
Here's an example of creating a Noteannotation and associated processor:
这是创建Note注释和关联处理器的示例：
APT: Compile-Time Annotation Processing with Java
Update. As of Java 1.7:
更新。从 Java 1.7 开始：
JSR 269, also known as the Language Model API, has two basic pieces: an API that models the Java programming language, and an API for writing annotation processors. This functionality is accessed through new options to the javac command; by including JSR 269 support, javac now acts analogously to the apt command in JDK 5.
JSR 269，也称为语言模型 API，有两个基本部分：一个为 Java 编程语言建模的 API，一个用于编写注释处理器的 API。此功能可通过 javac 命令的新选项访问；通过包含 JSR 269 支持，javac 现在的行为类似于 JDK 5 中的 apt 命令。
回答by Colin Pickard
The book "Core Java 2: Advanced features" has a section called The apt Tool for Source-Level Annotation Processingwhich might help you.
“Core Java 2: Advanced features”一书有一节叫做 The apt Tool for Source-Level Annotation Processing可能会对你有所帮助。
Update. As of Java 1.7:
更新。从 Java 1.7 开始：
JSR 269, also known as the Language Model API, has two basic pieces: an API that models the Java programming language, and an API for writing annotation processors. This functionality is accessed through new options to the javac command; by including JSR 269 support, javac now acts analogously to the apt command in JDK 5.
JSR 269，也称为语言模型 API，有两个基本部分：一个为 Java 编程语言建模的 API，一个用于编写注释处理器的 API。此功能可通过 javac 命令的新选项访问；通过包含 JSR 269 支持，javac 现在的行为类似于 JDK 5 中的 apt 命令。
