IDEA 提示 Spring Boot Annotion processor not found in classpath 解决办法

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通过使用spring-boot-configuration-processor JAR文件，可以轻松地从使用@ConfigurationProperties注解的项目项生成配置元数据文件。该JAR包含了一个Java注解处理器，在项目编译过程中被调用。只需将spring-boot-configuration-processor作为可选依赖项添加到项目中。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

在 maven 中添加此依赖即可

You can easily generate your own configuration meta-data file from items annotated with @ConfigurationProperties by using the spring-boot-configuration-processor jar. The jar includes a Java annotation processor which is invoked as your project is compiled. To use the processor, simply include spring-boot-configuration-processor as an optional dependency, for example with Maven you would add:

Appendix B. Configuration meta-data
https://docs.spring.io/spring-boot/docs/1.5.4.RELEASE/reference/html/configuration-metadata.html#configuration-metadata-annotation-processor