使用 CXF 做 webservice 简单例子

 

 

  Apache CXF 是一个开放源代码框架，提供了用于方便地构建和开发 Web 服务的可靠基础架构。它允许创建高性能和可扩展的服务，您可以将这样的服务部署在 Tomcat 和基于 Spring 的轻量级容器中，以及部署在更高级的服务器上，例如 Jboss、IBM® WebSphere® 或 BEA WebLogic。

       该框架提供了以下功能：

• Web 服务标准支持：CXF 支持以下 Web 服务标准：
  • Java API for XML Web Services (JAX-WS)
  • SOAP
  • Web 服务描述语言（Web Services Description Language ，WSDL）
  • 消息传输优化机制（Message Transmission Optimization Mechanism，MTOM）
  • WS-Basic Profile
  • WS-Addressing
  • WS-Policy
  • WS-ReliableMessaging
  • WS-Security
• 前端建模：CXF 提供了前端建模的概念，允许您使用不同的前端 API 来创建 Web 服务。API 允许您使用简单的工厂 Bean 并通过 JAX-WAS 实现来创建 Web 服务。它还允许您创建动态 Web 服务客户端。
• 工具支持：CXF 提供了用于在 Java Bean、Web 服务和 WSDL 之间进行转换的不同工具。它提供了对 Maven 和 Ant 集成的支持，并无缝地支持 Spring 集成。
• RESTful 服务支持：CXF 支持代表性状态传输（Representational State Transfer，RESTful ）服务的概念，并支持 Java 平台的 JAX-RS 实现。（本系列的第 2 部分将提供有关 RESTful 服务的更多信息。）
• 对不同传输和绑定的支持：CXF 支持不同种类的传输，从 XML 到逗号分隔值 (CSV)。除了支持 SOAP 和 HTTP 协议绑定之外，它还支持 Java Architecture for XML Binding (JAXB) 和 AEGIS 数据绑定。
• 对非 XML 绑定的支持：CXF 支持非 XML 绑定，例如 JavaScript Object Notation (JSON) 和 Common Object Request Broker Architecture (CORBA)。它还支持 Java 业务集成（Java Business Integration，JBI）体系架构和服务组件体系架构（Service Component Architecture，SCA）。
• code first 或者 xml first  ： 支持使用code first 或者 xml first 的方式来创建web服务。

       一  借助 annotation 创建独立启动的web 服务。

       准备： 新建工程 导入需要的jar 包:

                  

                  依赖的包：

                            commons-logging-1.1.jar
                            geronimo-activation_1.1_spec-1.0-M1.jar (or Sun's Activation jar)
                            geronimo-annotation_1.0_spec-1.1.jar (JSR 250)
                            geronimo-javamail_1.4_spec-1.0-M1.jar (or Sun's JavaMail jar)
                            geronimo-servlet_2.5_spec-1.1-M1.jar (or Sun's Servlet jar)
                            geronimo-ws-metadata_2.0_spec-1.1.1.jar (JSR 181)
                            jaxb-api-2.1.jar
                            jaxb-impl-2.1.6.jar
                            jaxws-api-2.1.jar
                            jetty-6.1.5.jar
                            jetty-util-6.1.5.jar
                            neethi-2.0.jar
                            saaj-api-1.3.jar
                            saaj-impl-1.3.jar
                            stax-api-1.0.1.jar
                            wsdl4j-1.6.1.jar
                            wstx-asl-3.2.1.jar
                            XmlSchema-1.2.jar
                            xml-resolver-1.2.jar     

                  spring jar 包， 用来支持xml配置：

                            aopalliance-1.0.jar
                            spring-core-2.0.4.jar
                            spring-beans-2.0.4.jar
                            spring-context-2.0.4.jar
                            spring-web-2.0.4.jar

                  

                   CXF jar包：

                            cxf-2.1.jar

   

         以上jar 包 可从apache官方网站下载 apache-cxf-2.1.2.zip， 然后从apache-cxf-2.1.2/lib 目录中获得

      1  首先服务点接口。

          package com.demo;

 

          import java.util.List;

          import javax.jws.WebParam;
          import javax.jws.WebService;
         

          @WebService
          public interface HelloWorld {
               String sayHi(@WebParam(name="text")String text);
               String sayHiToUser(User user);
               String[] SayHiToUserList(List<User> userList);
           }

 

     2  编写服务实现

         package com.demo;

         import java.util.LinkedHashMap;
         import java.util.List;
         import java.util.Map;

         import javax.jws.WebService;

 

         @WebService(endpointInterface="com.demo.HelloWorld",serviceName="HelloWorld")
         public class HelloWorldImpl implements HelloWorld {
 
                    Map<Integer, User> users = new LinkedHashMap<Integer, User>();

 
                    public String sayHi(String text) {
                                return "Hello " + text;
                   }

 

                   public String sayHiToUser(User user) {
                             users.put(users.size()+1, user);
                             return "Hello "+ user.getName();
                   }

                   public String[] SayHiToUserList(List<User> userList) {
                             String[] result = new String[userList.size()];
                             int i=0;
                             for(User u:userList){
                                  result[i] = "Hello " + u.getName();
                                  i++;
                             }
                     return result;
                   }
       }

  3  编写 webServiceApp.java类来暴露 web服务。

      package com.demo;

      import javax.xml.ws.Endpoint;

 

      public class webServiceApp {
                 public static void main(String[] args) {
                           System.out.println("web service start");
                           HelloWorldImpl implementor= new HelloWorldImpl();
                           String address="http://localhost:8080/helloWorld";
                           Endpoint.publish(address, implementor);
                           System.out.println("web service started");
                  }
      }

 4  run webServiceApp.java 类来启动服务。 访问 http://localhost:8080/helloWorld?wsdl  查看是否显示

     wsdl。

  

 5  编写客户端访问服务。

     package com.demo;

     import java.util.ArrayList;
     import java.util.List;

     import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
     import org.springframework.context.support.ClassPathXmlApplicationContext;

 

     public class HelloWorldClient {
              public static void main(String[] args) {
                        JaxWsProxyFactoryBean svr = new JaxWsProxyFactoryBean();
                        svr.setServiceClass(HelloWorld.class);
                        svr.setAddress("http://localhost:8080/helloWorld");
                        HelloWorld hw = (HelloWorld) svr.create();
                        User user = new User();
                        user.setName("Tony");
                        user.setDescription("test");
                        System.out.println(hw.sayHiToUser(user));
              }
     }

 

 

  6  测试： run webServiceApp.java 类来启动服务，然后 run HelloWorldClient.java 来访问服务。

  二 集成到spring 中。

  

  1 在 web.xml 中加入 ：

       <?xml version="1.0" encoding="UTF-8"?>
       <web-app>
                <welcome-file-list>
                         <welcome-file>index.jsp</welcome-file>
                </welcome-file-list>

                <context-param>
                          <param-name>contextConfigLocation</param-name>
                          <param-value>WEB-INF/classes/applicationContext.xml</param-value>
                 </context-param>
 
              <listener>
                      <listener-class>
                              org.springframework.web.context.ContextLoaderListener
                      </listener-class>
              </listener>

 

              <servlet>
                     <servlet-name>CXFServlet</servlet-name>
                     <display-name>CXFServlet</display-name>
                     <servlet-class>
                            org.apache.cxf.transport.servlet.CXFServlet
                     </servlet-class>
                     <load-on-startup>1</load-on-startup>
               </servlet>

               <servlet-mapping>
                      <servlet-name>CXFServlet</servlet-name>
                      <url-pattern>/webservice/*</url-pattern>
               </servlet-mapping>
         </web-app>

2  在 applicationContext.xml 中加入：

    <?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"
                 xsi:schemaLocation="
                       http://www.springframework.org/schema/beans

                       http://www.springframework.org/schema/beans/spring-beans.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"/>
 
                 <jaxws:endpoint 
                              id="helloWorld"
                              implementor="com.demo.HelloWorldImpl"
                              address="/helloWorld" />
   
                <bean id="client" class="com.demo.HelloWorld" 
                           factory-bean="clientFactory" factory-method="create"/>
    
                 <bean id="clientFactory" class="org.apache.cxf.jaxws.JaxWsProxyFactoryBean">
                            <property name="serviceClass" value="com.demo.HelloWorld"/>
                            <property name="address"

                                              value="http://localhost:8080/s/webservice/helloWorld"/>
                  </bean>
     </beans>

    注意： 这里需要加入  xmlns:jaxws="http://cxf.apache.org/jaxws"   和

              http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd

  3  修改客户端。

      package com.demo;

     import java.util.ArrayList;
     import java.util.List;

     import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
     import org.springframework.context.support.ClassPathXmlApplicationContext;

 

     public class HelloWorldClient {
              public static void main(String[] args) {
                        HelloWorld client = (HelloWorld)context.getBean("client");
                        User user1 = new User();
                        user1.setName("Tony");
                        user1.setDescription("test");
                        User user2 = new User();
                        user2.setName("freeman");
                        user2.setDescription("test");
                        List<User> userList= new ArrayList<User>();
                        userList.add(user1);
                        userList.add(user2);
                        String[] res = client.SayHiToUserList(userList);
                        System.out.println(res[0]);
                        System.out.println(res[1]);          

              }
     }

  4  发布工程 启动web服务器（我用 tomcat 6）。

  5 访问 http://localhost:8080/s/webservice/helloWorld?wsdl  查看是否显示 wsdl 。

  6  run run HelloWorldClient.java 来访问服务。