webservice

webservice实现应用程序之间的通信，使用xml传输数据。服务端通过http发布接口，在客户端通过http调用接口。

webservice涉及的技术
WSDL(Web Service Description Language)
基于xml的语言，用于描述webservices

SOAP(Simple Object Access Protocol)
基于xml的协议，用于访问网络服务

UDDI(Universal Description, Discovery and Integration)
目录服务

java实现webservice
使用JAXWS(Java API for XML Web Service)

@WebService
public interface WSServer {
    String test(@WebParam(name="text") String text);
}


@WebService(endpointInterface="jws.WSServer", serviceName="WSServer")
public class WSServerImpl implements WSServer {
    public String test(String text) {
        return text + ", I am server";
    }
}

public class StartServer {
    public static void main(String[] args) {
        System.out.println("starting server");
        WSServer server = new WSServerImpl();
        String address = "http://localhost:8080/test";
        Endpoint.publish(address, server);
        System.out.println("server started");
    }
}

public class WSClient {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://localhost:8080/test?wsdl");
            QName qName = new QName("http://jws/", "WSServer");
            Service service = Service.create(url, qName);
            WSServer server = service.getPort(WSServer.class);
            String str = server.test("Hello");
            System.out.println(str);
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}