Java AnnotationProcessor源代碼

-2

任何人都可以給我提供一個簡單的java註釋處理器的代碼片段，當它的處理方法被調用時它會打印「foo」。我在這已經工作了2天，我一直沒能走到這一步Java AnnotationProcessor源代碼

這裏是我的代碼：


public class ComplexityProcessor extends AbstractProcessor { 

    public ComplexityProcessor() { 
     super(); 
    } 

    @Override 
    public boolean process(Set annotations, 
          RoundEnvironment roundEnv) { 
     String message = "annotation found in "; 
     processingEnv.getMessager().printMessage(javax.tools.Diagnostic.Kind.NOTE, message); 

     try { 
      JavaFileObject jfo = processingEnv.getFiler().createSourceFile("Foo"); 
      BufferedWriter bw = new BufferedWriter(jfo.openWriter()); 
      bw.append("Bar!!!"); 
      bw.close(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     for (Element elem : roundEnv.getElementsAnnotatedWith(Complexity.class)) { 
      Complexity complexity = elem.getAnnotation(Complexity.class); 
      message = "annotation found in " + elem.getSimpleName() 
          + " with complexity " + complexity.value(); 
      processingEnv.getMessager().printMessage(javax.tools.Diagnostic.Kind.NOTE, message); 
      try { 
       JavaFileObject jfo = processingEnv.getFiler().createSourceFile("Foo"); 
       BufferedWriter bw = new BufferedWriter(jfo.openWriter()); 
       bw.append("Bar!!!"); 
       bw.close(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

     } 
     return true; // no further processing of this annotation type 
    }

來源

2012-04-09 ControlAltDel

你的代碼在哪裏？ – Jeffrey 2012-04-09 14:33:07

[堆棧溢出不是代碼編寫，教程或諮詢服務]（http://meta.stackexchange.com/a/128553/172496） – 2012-04-09 14:39:34

在這裏你可以找到[教程]（http：//www.javalobby。組織/ JAVA /論壇/ t17876.html）。 – dash1e 2012-04-09 14:40:21