Web Service简单入门例子

web广泛用到的技术：

他们的特点是其开放性，跨平台性，开放性正是Web services的基础。

下面是使用CXF Apache的插件实现Web Service的一个简单入门实例


1========新建一个服务接口

package com.clark;

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

@WebService
public interface IHelloWorld {
    
    public String sayHello(@WebParam(name="name")String name);
    
    public int plus(int a,int b);
}
2========服务接口实现类

package com.clark.impl;

import com.clark.IHelloWorld;

public class HelloWorldImpl implements IHelloWorld {

    @Override
    public String sayHello(String name) {
        return "Hello Wolrd ,"+name;
    }

    @Override
    public int plus(int a, int b) {
        return a+b;
    }

}

3============服务端

package com.clark.service;

import javax.xml.ws.Endpoint;

import com.clark.impl.HelloWorldImpl;

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

4============客户端(下面主要是针对Java普通程序的)
package com.clark.client;

import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;

import com.clark.IHelloWorld;

public class HelloWorldClient {
    public static void main(String[] args) {
        JaxWsProxyFactoryBean svr = new JaxWsProxyFactoryBean();
        svr.setServiceClass(IHelloWorld.class);
        svr.setAddress("http://localhost:8080/CXFWebService/service/IHelloWorld");
        IHelloWorld hw = (IHelloWorld) svr.create();
        String name = hw.sayHello(" CXF Apache implements Web Service");
        int result = hw.plus(2, 3);
        System.out.println(name);
        System.out.println(result);
    }
}

4==============客户端(针对Spring中集成Web Service的Web开发)
package com.clark.web;

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

import com.clark.IHelloWorld;

public class HelloWorldClient {
    public static void main(String[] args) {
        System.out.println("Web Service start..........");
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        
        IHelloWorld helloWorld = (IHelloWorld)context.getBean("client");
        
        String name = helloWorld.sayHello("1111111111");
        int result = helloWorld.plus(3, 4);
        System.out.println(name+"  "+result);
        
        System.out.println("Web Service end..........");
    }
}

5============Spring 的 applicationContext.xml配置
<?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">

    <jaxws:endpoint
                              id="helloWorld"
                              implementor="com.clark.impl.HelloWorldImpl"
                              address="/IHelloWorld" />
   
                <bean id="client" class="com.clark.IHelloWorld"
                           factory-bean="clientFactory" factory-method="create"/>
    
                 <bean id="clientFactory" class="org.apache.cxf.jaxws.JaxWsProxyFactoryBean">
                            <property name="serviceClass" value="com.clark.IHelloWorld"/>
                            <property name="address"

                                              value="http://localhost:8080/CXFWebService/service/IHelloWorld"/>
                  </bean>
</beans>

6=============Spring中集成Web Service服务(CXF Servlet的配置)，web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>CXFWebService</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
 
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <!-- <param-value>classpath:applicationContext.xml</param-value> -->
      <param-value>WEB-INF/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>/service/*</url-pattern>
               </servlet-mapping>
</web-app>

7=============启动服务，地址栏输入
http://localhost:8080/CXFWebService/service/IHelloWorld?wsdl能够看到相应的SOAP协议规范就OK