Simple getting started example of Web Service

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Web Service A simple introduction example

We generally achieve Web Service There are many ways to do this . I mainly used CXF Apache Plug ins and Axis 2 Two kinds of .

Web Service It is an online service solution provided by application service providers to solve every problem , It mainly adopts SOAP(Simple Object Access Protocol) agreement , The transmission data format uses XML Format to describe narration . Therefore, it also has the characteristics of cross platform .

web Widely used technology ：

1. TCP/IP： Universal Network protocol . Used by various devices
2. HTML（ Standard universal markup language Next application ）： Universal user interface , Able to use HTML The label displays data
3. Java： Write a generic that can be executed on any system programing language , because java With cross platform features
4. XML（ Standard universal markup language Next subset ）： Universal data representation language , stay web Upload structured data easy Method

Their characteristic is their openness . Cross-platform sex , Openness is just Web services The basis of .

Here are the USES CXF Apache Plug in implementation of Web Service A simple example of getting started

1======== Create a new service interface

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======== Service interface implementation class

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============ Server side

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============client( The following is mainly aimed at Java Ordinary program ) 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==============client( in the light of Spring In the integration Web Service Of Web Development ) 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 Of applicationContext.xml To configure <?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 In the integration Web Service service (CXF Servlet Configuration of ),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============= Start the service , Address field input http://localhost:8080/CXFWebService/service/IHelloWorld?

wsdl You can see the corresponding SOAP Agreement in specification OK

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