Web Service：Apache CXF简单例子

        service框架用apache CXF，服务器tomcat ，还有spring框架

        OpenSource中关于CXF的简介：Apache CXF一个开源的Service框架，它实现了JCP与Web Service中一些重要标准。CXF简化了构造，集成，面向服务架构(SOA)业务组件与技术的灵活复用。在CXF中，Service使用WSDL标准定义并能够使用各种不同的消息格式(或binding)和网络协议(transports)包括SOAP、XML（通过HTTP或JMS）进行访问。CXF同样支持多种model 如：JAX-WS，JBI，SCA和CORBA service。CXF设计成可灵活部署到各种容器中包括Spring-based，JBI，SCA， Servlet和J2EE容器。

       用CXF构建webservice程序的大致流程如下：

       1 配置web.xml文件，加载CXF

       2 编写java接口，和接口的实现

       3 在spring的applicationContext.xml中配置java文件

       4 创建beans.xml文件，里面配置接口的实现类

      5 运行tomca服务器即可生成wsdl文件

      6 编写测试代码：编写java测试文件和client-beans.xml文件

      7编写运行客户端文件所需的服务器，可以单独编写，也可以在随tomcat启动

示例代码。首先下载cxf，然后解压，将lib下的所有jar包拷到工程下面

    一 最简单的helloword

     1  web.xml

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd" >


< web-app >
     < context-param >
         < param-name > contextConfigLocation </ param-name >
         < param-value > WEB-INF/beans.xml </ param-value >
     </ context-param >

     < listener >
         < listener-class >
            org.springframework.web.context.ContextLoaderListener
         </ listener-class >
     </ listener >

     < servlet >
         < servlet-name > CXFServlet </ servlet-name >
         < display-name > CXF Servlet </ 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 > /* </ url-pattern >
     </ servlet-mapping >

</ web-app >

2  接口HelloWord.java和接口的实现HelloWordImpl.java

package  com.demo;

import  javax.jws.WebService;

/** */ /**
 * service interface
 * 
 * @author
 * 
 */
@WebService
public   interface  HelloWord  ... {
    String sayHi(String text);
}

 

 

package  com.demo;

import  javax.jws.WebService;

/** */ /**
 * implementation
 * 
 * @author 
 * 
 */
@WebService
public   class  HelloWordImpl  implements  HelloWord  ... {

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

 

3 beans.xml

<? 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 = " helloWord "
        implementor = " com.demo.HelloWordImpl "  address = " /HelloWord "   />

</ beans >

 

4  启动tomcat服务器，在浏览器里面输入http://localhost:8888/helloword后页面上会出现

{http://demo.com/}HelloWordImplPort ，点击会看到生成的wsdl文件http://localhost:8888/helloword/HelloWord?wsdl

 

5 客户端Client.java和client-beans.xml

package  com.demo;

import  org.springframework.context.ApplicationContext;
import  org.springframework.context.support.ClassPathXmlApplicationContext;

public   final   class  Client  ... {

    private Client() ...{

    }

    public static void main(String args[]) throws Exception ...{
        // START SNIPPET: client
        ApplicationContext  context = new ClassPathXmlApplicationContext(
                new String[] ...{ "com/demo/client-beans.xml" });

        HelloWord client = (HelloWord) context.getBean("client");

        String response = client.sayHi("+what????");
        System.out.println("Response: " + response);
        System.exit(0);
        // END SNIPPET: client
    }
}

<? 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-2.0.xsd
http: // cxf.apache.org/jaxws  http://cxf.apache.org/schema/jaxws.xsd ">

     < bean id = " client "   class = " com.demo.HelloWord "
        factory - bean = " clientFactory "  factory - method = " create "   />

     < bean id = " clientFactory "
         class = " org.apache.cxf.jaxws.JaxWsProxyFactoryBean " >
         < property name = " serviceClass "  value = " com.demo.HelloWord "   />
         < property name = " address "
            value = " http://localhost:9002/HelloWord "   />
     </ bean >

</ beans >

 

6 客户端运行时所需的服务器Server.java

package  com.demo;

import  org.mortbay.jetty.Connector;
import  org.mortbay.jetty.Handler;
import  org.mortbay.jetty.handler.DefaultHandler;
import  org.mortbay.jetty.handler.HandlerCollection;
import  org.mortbay.jetty.nio.SelectChannelConnector;
import  org.mortbay.jetty.webapp.WebAppContext;

public   class  Server  ... {

    protected Server() throws Exception ...{
        System.out.println("Starting Server");

        org.mortbay.jetty.Server server = new org.mortbay.jetty.Server();

        SelectChannelConnector connector = new SelectChannelConnector();
        connector.setPort(9002);
        server.setConnectors(new Connector[] ...{connector});

        WebAppContext webappcontext = new WebAppContext();
        webappcontext.setContextPath("/");

        webappcontext.setWar("WebRoot");

        HandlerCollection handlers = new HandlerCollection();
        handlers.setHandlers(new Handler[] ...{webappcontext, new DefaultHandler()});

        server.setHandler(handlers);
        server.start();
        System.out.println("Server ready...");
        server.join();
    }

    public static void main(String args[]) throws Exception ...{
        new Server();
    }

}

 

7 运行客户端Client.java的顺序，先启动tomcat，然后运行Server.java，最后运行Client.java

二 不单独编写Server.java文件，让其和tomcat一同启动.需要改动的地方

1 web.xml

< context-param >
         < param-name > contextConfigLocation </ param-name >
          < param-value