java - [学习EJB] : annotation type is not applicable to this kind of declaration?

Question

尝试使用NetBeans 7.0和EJB 3 in Action一书创建最简单的EJB。

好吧，首先我创建了一个界面:

package study;

public interface NewInterface {
    public void sayHello(String name);
}

然后，EJB:

package study;
import javax.ejb.Stateless;

public class NewClass implements NewInterface{

    @Override
    @Stateless //! ERROR here !
    public void sayHello(String name) {
       System.out.println("Hello " + name);
    }  
}

Java 提示@Stateless

annotation type is not applicable to this kind of declaration

为什么？

Answer 1

应该位于类声明中(而不是方法)。就像这样:

package study;
import javax.ejb.Stateless;

@Stateless
public class NewClass implements NewInterface{

    @Override
    public void sayHello(String name) {
       System.out.println("Hello " + name);
    }  
}

来自here