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Spring MVC + CXF实现webservice接口
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本来都是WebAPI/RestfulAPI接口对外提供接口的，突然有个需求要提供WebService接口，本想着Spring和CXF这么成熟的两个产品，这么的也整不出什么幺蛾子来啊。
结果还真是出了几个幺蛾子。把解决方案贴出来，希望能帮助有需求的小伙伴少走弯路。
解决方案的软件版本（OpenJDK10，Spring MVC 5，CXF 3）
1.OpenJDK中WebService的注解不见了
解决方案：追加第三方依赖包，注意type是pom
<dependency>
<groupId>com.sun.xml.ws</groupId>
<artifactId>jaxws-ri</artifactId>
<version>2.3.2</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
2.WebService配置文件，网上搜出来的版本五花八门，不知道哪种是对的
解决方案：
spring-webservice.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xsi:schemaLocation="
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">
<!-- 自动扫描webService -->
<context:component-scan base-package="com.xxx.webservice.impl" />
<!-- 定义webservice的发布接口 -->
<jaxws:endpoint
implementor="#helloWorld"
address="/HelloWorld"></jaxws:endpoint>
</beans>
pom.xml
<!-- webservice -->
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxws</artifactId>
<version>3.1.8</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-transports-http</artifactId>
<version>3.1.8</version>
</dependency>
3.按照网上的方案，此刻追加了webservice的接口和实现类，
在web.xml里面配置一下映射应该就可以了，
<servlet>
<servlet-name>spring-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--定义一个cxf的servlet-->
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/webservice/*</url-pattern>
</servlet-mapping>
但是，这时候会出现“Can't find the the request for http://localhost:8080/xxx/webservice/HelloWorld's Observer ”找不到实现类
这时候涉及到Spring的两个概念ContextLoaderListener和DispatcherServlet
简单来说ContextLoaderListener是全局Spring的容器，DispatcherServlet是Spring MVC的容器，作用域是不一样的。
我们在SpringMVC中，通常只用到了DispatcherServlet，而CXF目前来看不是使用的这个容器的上下文，所以找不到实现类。
于是我们在web.xml中追加了ContextLoaderListener，并且把所有的Spring相关配置都设置在了他的上下文
<listener>
<description>Define spring listener.</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <context-param>
<description>Define applicationContext.xml location.</description>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:spring/spring-*.xml
</param-value>
</context-param>
<servlet>
<servlet-name>spring-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--定义一个cxf的servlet-->
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/webservice/*</url-pattern>
</servlet-mapping>
这时候，就可以跑通了，调用到webservice接口了
