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>
           WEB-INF/applicationContext.xml
           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>2</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>CXFServlet</servlet-name>
        <url-pattern>/webservice/*</url-pattern>
    </servlet-mapping>
   
2 applicationContext.xml 配置文件中com.demo.HelloWordFind,  HelloWordFind.java可以写一个查询表HELLO_WORD中所有内容的代码。相应的HelloWord.java和HelloWordImpl.java也需要修改

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans default-autowire="byName">

   <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>WEB-INF/jdbc.properties</value>
            </list>
        </property>
    </bean>
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!-- Hibernate SessionFactory -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mappingResources">
            <list>
                <value>mapping/HelloWord.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.DB2Dialect</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <property name="eventListeners">
            <map>
                <entry key="merge">
                    <bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener"/>
                </entry>
            </map>
        </property>
    </bean>

    <bean id="hellowordfind" class="com.demo.HelloWordFind">
        <property name="sessionFactory" ref="sessionFactory"/>
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

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" />
    <bean id="hellowordimpl" class="com.demo.HelloWordImpl">
      <property name="sessionFactory" ref="sessionFactory"/>
      <property name="dataSource" ref="dataSource"/>
      <property name="hellowordfind" ref="hellowordfind" />   
    </bean>
    <jaxws:endpoint id="helloword"  implementor="#hellowordimpl" address="/hellword" />
</beans>
4 主要需要改动的已经完成。客户端代码变化不大。


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