cxf-2.1.3,jdk6,jboss7.0.2,spring3.0.6
用cxf+spring开发web service程序很简单,不过有一些集成问题要注意。在此把这几天发现的一些总结一下,最后有一个遗留的问题
1、关于bean的声明
要发布或者要调用的web service接口,需要用@WebService注解声明。不过要注意的是,@WebService注解不会把类声明为spring的bean
可以声明为bean的方式有以下4个:
<jaxws:endpoint>
<jaxws:client>
<bean id="" class="">
@Component
写了一个类来证明这一点:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd"> <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" /> <context:component-scan base-package="com.huawei.framework" /> <bean id="helloWorldImpl" class="com.huawei.framework.webservice.HelloWorldImpl"> <property name="remedy" ref="remedy" /> </bean> <jaxws:endpoint id="helloWorld" address="/HelloWorld" implementor="#helloWorldImpl" /> <jaxws:client id="remedy" serviceClass="com.huawei.remedy.webservice.RemedyWebServiceCM" address="http://10.78.229.199:8080/remedy/webservice/RemedyWebService" /> </beans>
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ServletContext context = request.getServletContext(); WebApplicationContext wc = WebApplicationContextUtils .getWebApplicationContext(context); String[] beans = wc.getBeanDefinitionNames(); for (String beanName : beans) { System.out.println(beanName); } RemedyWebServiceCM remedy = (RemedyWebServiceCM) wc.getBean("remedy"); AcknowledgeRequest message = new AcknowledgeRequest(); remedy.acknowledge(message); }
在控制台可以看到以下几个bean:
20:02:24,120 INFO [stdout] (http--0.0.0.0-8888-2) helloWorldImpl
20:02:24,120 INFO [stdout] (http--0.0.0.0-8888-2) helloWorld
20:02:24,120 INFO [stdout] (http--0.0.0.0-8888-2) remedy
以上3个bean,就分别是由<bean>、<jaxws:endpoint>、<jaxws:client>生成的
2、如果要在<jaxws:endpoint>的实现类中注入bean的话,要注意:
错误的写法:
<jaxws:endpoint id="helloWorld" address="/HelloWorld" implementor="com.huawei.framework.webservice.HelloWorldImpl" />
用这种写法,虽然HelloWorldImpl类已经被声明成bean了,但是注入是失败的
准确来说,在spring容器中存在有HelloWorldImpl对应的bean,并且相关的依赖也已经注入了。但是cxf框架得到的HelloWorldImpl,与上述的bean不是同一个对象,这个HelloWorldImpl对象可能是用反射或者其他机制创建出来的,没有任何组件被注入
正确的写法:
<jaxws:endpoint id="helloWorld" address="/HelloWorld" implementor="#helloWorldImpl" />
在implementor属性中,用#beanName,这样的话,cxf框架得到的HelloWorldImpl,就是spring容器持有的那个bean。当然这有个前提,就是系统中已经存在这个bean。用<bean id="">或者@Component都是OK的,这里支持注解
3、上面说的是<jaxws:endpoint>,比较简单。但是<jaxws:client>就比较麻烦
我目前感觉,<jaxws:client>声明的bean,没办法在别的bean里用@Autowired注入,只能用<bean id="">的方式来注入
@WebService public interface RemedyWebServiceCM { RemedyResponse acknowledge(AcknowledgeRequest arg0); RemedyResponse close(CloseRequest arg0); RemedyResponse notify(NotifyRequest arg0); }
public class HelloWorldImpl implements HelloWorld { private RemedyWebServiceCM remedy; public String sayHi(User theUser) { AcknowledgeRequest message = new AcknowledgeRequest(); remedy.acknowledge(message); return "Hello " + theUser.getName() + " ,your age is " + theUser.getAge(); } public void setRemedy(RemedyWebServiceCM remedy) { this.remedy = remedy; } }
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd"> <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" /> <context:component-scan base-package="com.huawei.framework" /> <bean id="helloWorldImpl" class="com.huawei.framework.webservice.HelloWorldImpl"> <property name="remedy" ref="remedy" /> </bean> <jaxws:endpoint id="helloWorld" address="/HelloWorld" implementor="#helloWorldImpl" /> <jaxws:client id="remedy" serviceClass="com.huawei.remedy.webservice.RemedyWebServiceCM" address="http://10.78.229.199:8080/remedy/webservice/RemedyWebService" /> </beans>
用这种<bean id="">的方式就可以
@Controller public class HelloWorldImpl implements HelloWorld { @Autowired private RemedyWebServiceCM remedy; public String sayHi(User theUser) { AcknowledgeRequest message = new AcknowledgeRequest(); remedy.acknowledge(message); return "Hello " + theUser.getName() + " ,your age is " + theUser.getAge(); } }
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd"> <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" /> <context:component-scan base-package="com.huawei.framework" /> <jaxws:endpoint id="helloWorld" address="/HelloWorld" implementor="#helloWorldImpl" /> <jaxws:client id="remedy" serviceClass="com.huawei.remedy.webservice.RemedyWebServiceCM" address="http://10.78.229.199:8080/remedy/webservice/RemedyWebService" /> </beans>
用@Autowired加@Component的方式来做,就不行,报以下异常:
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.huawei.remedy.webservice.RemedyWebServiceCM com.huawei.framework.webservice.HelloWorldImpl.remedy; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.huawei.remedy.webservice.RemedyWebServiceCM] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508) [org.springframework.beans-3.0.6.RELEASE.jar:]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84) [org.springframework.beans-3.0.6.RELEASE.jar:]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) [org.springframework.beans-3.0.6.RELEASE.jar:]
... 21 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.huawei.remedy.webservice.RemedyWebServiceCM] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:924) [org.springframework.beans-3.0.6.RELEASE.jar:]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:793) [org.springframework.beans-3.0.6.RELEASE.jar:]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707) [org.springframework.beans-3.0.6.RELEASE.jar:]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480) [org.springframework.beans-3.0.6.RELEASE.jar:]
... 23 more
说自动注入失败,因为找不到RemedyWebServiceCM类型的bean
试了很久,完全搞不定。也想不通是为啥,因为RemedyWebServiceCM这个类型的bean,明明已经用<jaxws:client>声明了,而且用配置文件的方式也是能搞定的