Grails无法识别Java类 [英] Grails fails to recognize Java class

问题描述

我在Windows 7（32位）上使用Groovy / Grails Tool Suite 3.1.0。我不能在我的生活中让Grails识别我在我的Grails应用程序的/ src / java目录中创建的简单Java类。

这是我的java类：

  public class PleaseWork {
 
 public static void hello（）
 {
 System.out.println（来自java类的Hello。）; 
 
 
 
 
 $ b我从我创建的服务调用java类： 
 
 
  package mypackage $ b $ class CreatePdfService {
 
 def serviceMethod（）{
 
 PleaseWork.hello（）
} 
} 
  
 I已经检查了我的项目的.classpath，我看到以下内容：
 
 
 < classpath> 
< classpathentry kind =srcpath =src / java/> 
< classpathentry kind =srcpath =src / groovy/> 
< classpathentry kind =srcpath =grails-app / conf/> .... 
  
它看起来像我的java源代码目录，并且没有设置将它排除在外。一切看起来都不错。
 
 
 
我的理解是我应该可以毫无问题地调用那个java类。我可以做一个没有问题的Grails运行应用程序。但是，当我运行我的应用程序并且代码尝试调用PleaseWork.hello（）时，我得到以下内容： 
 
 
  |错误2013-02-18 15：59：10,898 [http-bio-8080-exec-4]错误errors.GrailsExceptionResolver  -  
处理请求时发生MissingPropertyException：[POST] / mypackage / main / createPdf 
没有这样的属性：请为类class：mypackage.CreatePdfService工作。 Stacktrace如下：
消息：没有这样的属性：PleaseWork for class：mypackage.CreatePdfService 
  
 I已经完成了grails刷新依赖，没有任何工作。什么给了？
解决方案
您不能从包中的类的默认包中访问类。将该类移动到与该服务相同的包中，或者将其放入不同的包中并添加一个导入。
 
I'm using Groovy/Grails Tool Suite 3.1.0 on Windows 7(32 bit).  I cannot for the life of me get Grails to recognize a simple Java class I created in the /src/java directory of my Grails application.

Here is my java class:
public class PleaseWork {

    public static void hello()
    {
        System.out.println("Hello from a java class.");
    }
}
I am calling the java class from a service I created:
package mypackage
class CreatePdfService {

    def serviceMethod() {

        PleaseWork.hello()
    }
}
I've checked my .classpath for my project and I see the following:
<classpath>
<classpathentry kind="src" path="src/java"/>
<classpathentry kind="src" path="src/groovy"/>
<classpathentry kind="src" path="grails-app/conf"/>....
It looks like my java source directory is included and there are no settings that are excluding it.  Everything looks good.

My understanding is that I should be able to call that java class with no problem.  And I can do a grails run-app with no issues.  But... when I run my application and the code attempts to call PleaseWork.hello() I get the following:
| Error 2013-02-18 15:59:10,898 [http-bio-8080-exec-4] ERROR errors.GrailsExceptionResolver  -   
MissingPropertyException occurred when processing request: [POST] /mypackage/main/createPdf
No such property: PleaseWork for class: mypackage.CreatePdfService. Stacktrace follows:
Message: No such property: PleaseWork for class: mypackage.CreatePdfService
I've done grails refresh-dependencies and nothing works.  What gives?
解决方案
You can't access classes from the "default" package from a class in a package. Either move the class to the same package as the service, or put it in a different one and add an import.

                        
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