java jdk1.6内置支持的webservice使用示范 _Web前端

java jdk1.6内置支持的webservice使用示例

webService是一种跨语言的系统间交互标准。在java中使用webservice根据服务器端的服务根据描述生成WSDL文件，并将应用与此WSDL文件一起放入HTTP服务器中，借助服务工具根据WSDL文件生成客户端STUB代码。此代码的作用是将产生的对象请求信息封装成标准的SOAP格式数据，并发送到服务器端，服务器端根据接收到的SOAP格式数据进行转换，并最终通过反射调用响应类的响应方法。

jdk 6中集成了WEB service的支持，通过WebService 的annotation来暴露服务的实现，并通过Endpoint.publish将服务发布到指定的地址，客户端通过wsimport来访问响应地址的wsdl文件，生成调用服务器端服务的stub类信息，客户端即可通过生成的类来调用服务器的服务了。

具体示例如下：

1.对外暴露的接口

Java代码

public?interface?TestWebService?{ ??
??
????public?String?echo(); ??
}??

public interface TestWebService {

	public String echo();
}

2.服务器端的实现类，并通过@WebService来指定对外提供服务的服务名称，客户端生成的类目和包名

Java代码

import?javax.jws.WebService; ??
import?javax.xml.ws.Endpoint; ??
??
??
@WebService(name="MyTestWS",serviceName="MyWebService",targetNamespace="http://localhost/client") ??
public?class?WebServiceImpl?implements?TestWebService{ ??
??
????@Override??
????public?String?echo()?{ ??
????????return?"webservice?return?msg"; ??
????} ??
???? ??
????public?static?void?main(String[]?args)?{ ??
????????Endpoint.publish("http://localhost:8080/MyWebService",?new?WebServiceImpl()); ??
????} ??
}??

import javax.jws.WebService;
import javax.xml.ws.Endpoint;


@WebService(name="MyTestWS",serviceName="MyWebService",targetNamespace="http://localhost/client")
public class WebServiceImpl implements TestWebService{

	@Override
	public String echo() {
		return "webservice return msg";
	}
	
	public static void main(String[] args) {
		Endpoint.publish("http://localhost:8080/MyWebService", new WebServiceImpl());
	}
}

3.然后运行服务器的WebServiceImpl的main函数，暴露服务并将服务注册到一个http服务地址上，客户端通过jdk的bin下面的wsimport命令来获取服务器的wsdl文件并生成客户端的stub类信息

Java代码

wsimport?-keep?http://localhost:8080/MyWebService?wsdl??

wsimport -keep http://localhost:8080/MyWebService?wsdl

4.然后在你的路径上就会生成下面几个类

5.然后我们编写客户端的调用代码

??import localhost.client.MyWebService;

Java代码

??
??
public?class?WebServiceClient?{ ??
??
????public?static?void?main(String[]?args)?{ ??
????????MyWebService?myWebService?=?new?MyWebService(); ??
????????System.out.println(myWebService.getMyTestWSPort().echo()); ??
????} ??
}??

public class WebServiceClient {

	public static void main(String[] args) {
		MyWebService myWebService = new MyWebService();
		System.out.println(myWebService.getMyTestWSPort().echo());
	}
}

6.执行客户端的调用代码，输出如下：

7.我们看下最终生成客户端服务调用的类内容

Java代码

package?localhost.client; ??
??
import?java.net.MalformedURLException; ??
import?java.net.URL; ??
import?javax.xml.namespace.QName; ??
import?javax.xml.ws.Service; ??
import?javax.xml.ws.WebEndpoint; ??
import?javax.xml.ws.WebServiceClient; ??
??
??
/** ?
?*?This?class?was?generated?by?the?JAXWS?SI. ?
?*?JAX-WS?RI?2.0_02-b08-fcs ?
?*?Generated?source?version:?2.0 ?
?*? ?
?*/??
@WebServiceClient(name?=?"MyWebService",?targetNamespace?=?"http://localhost/client",?wsdlLocation?=?"http://localhost:8080/MyWebService?wsdl") ??
public?class?MyWebService ??
????extends?Service ??
{ ??
??
????private?final?static?URL?MYWEBSERVICE_WSDL_LOCATION; ??
??
????static?{ ??
????????URL?url?=?null; ??
????????try?{ ??
????????????url?=?new?URL("http://localhost:8080/MyWebService?wsdl"); ??
????????}?catch?(MalformedURLException?e)?{ ??
????????????e.printStackTrace(); ??
????????} ??
????????MYWEBSERVICE_WSDL_LOCATION?=?url; ??
????} ??
??
????public?MyWebService(URL?wsdlLocation,?QName?serviceName)?{ ??
????????super(wsdlLocation,?serviceName); ??
????} ??
??
????public?MyWebService()?{ ??
????????super(MYWEBSERVICE_WSDL_LOCATION,?new?QName("http://localhost/client",?"MyWebService")); ??
????} ??
??
????/** ?
?????*? ?
?????*?@return ?
?????*?????returns?MyTestWS ?
?????*/??
????@WebEndpoint(name?=?"MyTestWSPort") ??
????public?MyTestWS?getMyTestWSPort()?{ ??
????????return?(MyTestWS)super.getPort(new?QName("http://localhost/client",?"MyTestWSPort"),?MyTestWS.class); ??
????} ??
??
}??

package localhost.client;

import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;
import javax.xml.ws.WebEndpoint;
import javax.xml.ws.WebServiceClient;


/**
 * This class was generated by the JAXWS SI.
 * JAX-WS RI 2.0_02-b08-fcs
 * Generated source version: 2.0
 * 
 */
@WebServiceClient(name = "MyWebService", targetNamespace = "http://localhost/client", wsdlLocation = "http://localhost:8080/MyWebService?wsdl")
public class MyWebService
    extends Service
{

    private final static URL MYWEBSERVICE_WSDL_LOCATION;

    static {
        URL url = null;
        try {
            url = new URL("http://localhost:8080/MyWebService?wsdl");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        MYWEBSERVICE_WSDL_LOCATION = url;
    }

    public MyWebService(URL wsdlLocation, QName serviceName) {
        super(wsdlLocation, serviceName);
    }

    public MyWebService() {
        super(MYWEBSERVICE_WSDL_LOCATION, new QName("http://localhost/client", "MyWebService"));
    }

    /**
     * 
     * @return
     *     returns MyTestWS
     */
    @WebEndpoint(name = "MyTestWSPort")
    public MyTestWS getMyTestWSPort() {
        return (MyTestWS)super.getPort(new QName("http://localhost/client", "MyTestWSPort"), MyTestWS.class);
    }

}