Java注解会员验证上编译

Question

我有一个自定义的Java注解像下面

@customelement(folder = "/path/") 
public testMethod() { 

} 

我要验证的文件夹路径（“/路径/”）的文件夹成员变量和报告java源内部错误。我该怎么做？

Answer 1

Java Annotation Element Method return

@Override 
    public boolean process(Set<? extends TypeElement> annotations, 
          RoundEnvironment roundEnv) { 
     Set<? extends Element> elements = roundEnv.getElementsAnnotatedWith(CustomAnnotation.class); 
     for(Element te : elements){ 
      CustomAnnotation annotation = te.getAnnotation(CustomAnnotation.class); 
      String folder = annotation.folder(); 
      //... do sth with folder in context of te. 
      //te represent annotated method, e.g. testMethod from your example 
     } 
     return true; 
    } 

还记得注释与@SupportedAnnotationTypes您CompileTimeAnnotationProcessor（ “package.CustomAnnotation”）和@SupportedSourceVersion（SourceVersion.RELEASE_7）（或Java语法的任何版本，你要支持）。

如果还有其他问题，我建议阅读这篇优秀的教程博文。