resteasy拦截器，拦截rest请求，修改response header内容

只拦截GET请求，并修改header中的内容反馈给客户端

 import java.io.IOException;
 import java.lang.reflect.Method;

 import javax.ws.rs.GET;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.ext.Provider;

 import org.jboss.resteasy.annotations.interception.ServerInterceptor;
 import org.jboss.resteasy.spi.interception.AcceptedByMethod;
 import org.jboss.resteasy.spi.interception.MessageBodyWriterContext;
 import org.jboss.resteasy.spi.interception.MessageBodyWriterInterceptor;

 @Provider
 @ServerInterceptor
 public class MyHeaderDecorator implements MessageBodyWriterInterceptor,
         AcceptedByMethod {

     public boolean accept(Class declaring, Method method) {
         return method.isAnnotationPresent(GET.class);
     }

     public void write(MessageBodyWriterContext context) throws IOException,
             WebApplicationException {

         context.getHeaders().add("My-Header", "custom");
         context.proceed();
     }
 }

参考http://docs.jboss.org/resteasy/docs/1.1.GA/userguide/html/Interceptors.html