WebService CXF学习（入门篇2）：HelloWorld

理论联系实际，单单只讲理论那就成了纸上谈兵，用一个HelloWorld Demo可来说明事更加直观。那下面咱们就开始进行讲解： 
   首先到apache官方网下载apache-cxf-2.2.2,地址：http://cxf.apache.org/ 
   新建一个Java Project,导入cxf常用.jar包 

commons-logging-1.1.1.jar
geronimo-activation_1.1_spec-1.0.2.jar (or Sun's Activation jar)
geronimo-annotation_1.0_spec-1.1.1.jar (JSR 250)
geronimo-javamail_1.4_spec-1.6.jar (or Sun's JavaMail jar)
geronimo-servlet_2.5_spec-1.2.jar (or Sun's Servlet jar)
geronimo-ws-metadata_2.0_spec-1.1.2.jar (JSR 181)
geronimo-jaxws_2.1_spec-1.0.jar (or Sun's jaxws-api-2.1.jar)
geronimo-stax-api_1.0_spec-1.0.1.jar (or other stax-api jar)
jaxb-api-2.1.jar
jaxb-impl-2.1.12.jar
jetty-6.1.21.jar
jetty-util-6.1.21.jar
neethi-2.0.4.jar
saaj-api-1.3.jar
saaj-impl-1.3.2.jar
wsdl4j-1.6.2.jar
wstx-asl-3.2.8.jar
XmlSchema-1.4.5.jar
xml-resolver-1.2.jar
cxf-2.2.2.jar

   接下就是HelloWorld Demo开发了 
   第一步：新建一个webservice接口 

@WebService
public interface IHelloWorld {
    //@WebParam给参数命名，提高可代码可读性。此项可选
blic String sayHi(@WebParam(name="text") String text);
}

   通过注解@WebService申明为webservice接口 
   第二步，实现WebService接口 

  @WebService
  public class HelloWorldImpl implements IHelloWorld {

public String sayHi(String name) {
    System.out.println("sayHello is called by " + name);
    return "Hello " + name;
}

   }

   第三步，创建服务端 

  public class Server {

private Server(){
    IHelloWorld helloWorld = new HelloWorldImpl();
    //创建WebService服务工厂
    JaxWsServerFactoryBean factory = new JaxWsServerFactoryBean();
    //注册WebService接口
    factory.setServiceClass(IHelloWorld.class);
    //发布接口
    factory.setAddress("http://localhost:9000/HelloWorld");
    factory.setServiceBean(helloWorld);
    //创建WebService
    factory.create();
};

public static void main(String[] args) throws InterruptedException{
       //启动服务端
              new Server();
    System.out.println("Server ready...");
    //休眠一分钟，便于测试
               Thread.sleep(1000*60);
    System.out.println("Server exit...");
    System.exit(0);
}
   }

    第四步，创建客户端 
  

   public class Client {

private Client(){};

public static void main(String[] args){
    //创建WebService客户端代理工厂
    JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean();
    //注册WebService接口
    factory.setServiceClass(HelloWorld.class);
    //设置WebService地址
    factory.setAddress("http://localhost:9000/HelloWorld");
    IHelloWorld iHelloWorld = (IHelloWorld)factory.create();
    System.out.println("invoke webservice...");
    System.out.println("message context is:"+iHelloWorld.sayHi("
                 Josen"));
    System.exit(0);
}
   }

    最后是万事俱备，只欠测试了 
    首先，运行服务端程序 
    其次，打开浏览器，在地址栏中输入http://localhost:9000/HelloWorld?wsdl（因为cxf自带了一个jetty服务器），查看接口是否发布成功,如里浏览器页面显示下面内容，证明接口发布成功 

   <wsdl:definitions name="IHelloWorldService" targetNamespace="http://client.itdcl.com/">
<wsdl:types>
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="unqualified" targetNamespace="http://client.itdcl.com/">
<xsd:element name="sayHi" type="tns:sayHi"/>
<xsd:complexType name="sayHi">
<xsd:sequence>
<xsd:element minOccurs="0" name="text" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="sayHiResponse" type="tns:sayHiResponse"/>
<xsd:complexType name="sayHiResponse">
<xsd:sequence>
<xsd:element minOccurs="0" name="return" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
</wsdl:types>
<wsdl:message name="sayHi">
<wsdl:part element="tns:sayHi" name="parameters">
    </wsdl:part>
</wsdl:message>
<wsdl:message name="sayHiResponse">
<wsdl:part element="tns:sayHiResponse" name="parameters">
    </wsdl:part>
</wsdl:message>
<wsdl:portType name="IHelloWorld">
<wsdl:operation name="sayHi">
<wsdl:input message="tns:sayHi" name="sayHi">
    </wsdl:input>
<wsdl:output message="tns:sayHiResponse" name="sayHiResponse">
    </wsdl:output>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="IHelloWorldServiceSoapBinding" type="tns:IHelloWorld">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="sayHi">
<soap:operation soapAction="" style="document"/>
<wsdl:input name="sayHi">
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output name="sayHiResponse">
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="IHelloWorldService">
<wsdl:port binding="tns:IHelloWorldServiceSoapBinding" name="IHelloWorldPort">
<soap:address location="http://localhost:9000/HelloWorld"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>

    最后，运行客户端程序，看看效果如果。 
    这一节就讲到此为止，下节对WSDL定义进行讲解，便于对上面这个Demo进行很好的消化，同时对后面章节启个辅塾作用。