Javassist - 向类添加注释不适用于反射
我正在使用 javassist 创建一个类并向其添加注释。当我使用 CtClass.writeFile 时，我看到带有 Java 反编译器的类文件，注释在那里，但当我使用 class.getAnnotations() 或 class.getDeclaredAnnotations() 时，列表为空。
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath(new ClassClassPath(cl.loadClass("javax.jws.WebService")));
CtClass pikoClass = pool.makeClass("br.com.stuff.Piko");
ConstPool constPool = pikoClass.getClassFile().getConstPool();
AnnotationsAttribute attr = new AnnotationsAttribute(constPool, annotationsAttribute.visibleTag);
Annotation annoWebService = Annotation(constPool, pool.get("javax.jws.WebService"));
attr.setAnnotation(annoWebService);
pikoClass.getClassFile().addAttribute(attr);
Class piko = pikoClass.toClass();
piko.getDeclaredAnnotations(); // this is always empty
// Also tried
Annotation annoWebService = new Annotation("WebService", constPool);
Annotation annoWebService = new Annotation("@WebService", constPool);
Annotation annoWebService = new Annotation("javax.jwsWebService", constPool);
Annotation annoWebService = new Annotation("@javax.jwsWebService", constPool);
I'm creating a class using javassist and add annotation to it. When I use CtClass.writeFile and I see class file with Java decompiler the annotation is there but when I use class.getAnnotations() or class.getDeclaredAnnotations() the list is empty.
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath(new ClassClassPath(cl.loadClass("javax.jws.WebService")));
CtClass pikoClass = pool.makeClass("br.com.stuff.Piko");
ConstPool constPool = pikoClass.getClassFile().getConstPool();
AnnotationsAttribute attr = new AnnotationsAttribute(constPool, annotationsAttribute.visibleTag);
Annotation annoWebService = Annotation(constPool, pool.get("javax.jws.WebService"));
attr.setAnnotation(annoWebService);
pikoClass.getClassFile().addAttribute(attr);
Class piko = pikoClass.toClass();
piko.getDeclaredAnnotations(); // this is always empty
// Also tried
Annotation annoWebService = new Annotation("WebService", constPool);
Annotation annoWebService = new Annotation("@WebService", constPool);
Annotation annoWebService = new Annotation("javax.jwsWebService", constPool);
Annotation annoWebService = new Annotation("@javax.jwsWebService", constPool);
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问题解决了，我使用的是 3.1 版本，现在我使用的是 3.12.1.GA（最后在 maven 存储库上）并且在此版本上注释有效。
Problem solved, I was using version 3.1, now I'm using 3.12.1.GA (last on maven repository) and on this version annotations works.
也许我很愚蠢，这是一个无用的答案，但如果你收到一个错误，说
请记住检查导入并确保导入正确的注释：
并不是 Eclipse 自动导入的错误库让我浪费了二十分钟的时间 (java.lang.annotation.Annotation)
Maybe I am dumb and this is an useless answer but if you are receiving an errors that says
Remember to check the import and make sure that you are importing the right Annotation:
And not the wrong library automatically imported by Eclipse that made me waste twenty minutes of my life (java.lang.annotation.Annotation)