First knowledge of WebService

first, what is a Web service

Web Service is a development model that can be used to solve the problem of cross-network application integration, in order to ensure that the application services of different platforms can interoperate.

Ii. three core of Web services

Soap:

SOAP, Simple Object access Protocol, is an XML-based protocol that can be identified in a step-by application. In addition, SOAP itself does not define any programming language, which allows soap to be delivered as a message to various remote systems.

The transport protocol used by SOAP, which can be http,smtp,pop3,jms.

soap consists of 4 parts:

"Soap Encapsulation (Envelope)":

Define a description of what the information describes, who is sending it, who should deal with it, and how to deal with their framework.

"SOAP Encoding Rules":

An instance of the data type that the application needs to use.

"SOAP RPC":

Represents a contract that is called and answered in a remote procedure.

"Sopa binding":

Exchange information using the underlying protocol.

WSDL:

The WSDL (Web service Description language,web Service Description Language) is an XML document that defines operations and messages for a given WEB service receiver in an abstract way that is not specific to the language.

UDDI:

UDDI (Universal Description Discovery and integration, unified Description Discovery and Integration protocol) is a specification that defines the publishing, discovery, and management of information related to Web services.

third, Jax-ws

Jsx-ws (Java API for XML Web Service). He is a technique used to simplify the work of building Web services and Web service clients using Java.

iv.use of Web services in projects

Scenario One: Enter URL,HTTP://WS.WEBXML.COM.CN/WEBSERVICES/MOBILECODEWS.ASMX?WSDL in the address bar

Scenario two: Implementation via Java code

To Open the cmd command: ------"cd\ to C packing directory------" wsimport-s. http://ws.webxml.com.cn/WebServices/MobileCodeWS.asmx?wsdl. and generate a series of Java classes in the C packing directory. and apply it to the project for testing

Test class:

public class MyTest {public static void main (string[] args) {mobilecodews ws=new mobilecodews (); Mobilecodewssoap Soap=ws.getmobilecodewssoap (); String address=soap.getmobilecodeinfo ("13225788", "");    SYSTEM.OUT.PRINTLN (address);}}

　　

Scenario three: Using Jax-WS Publishing Services

① defining server classes and Methods [HelloService]

Use @webservice annotations to identify a Java class or an interface as a service

/* * @WebService annotations, identify a Java class or an interface as a service, once labeled @webservice, he is not a normal * interface, he is called the Service endpoint interface (Services Endpoint Interface) */@ Webservicepublic class HelloService {public void Say (String name) {System.out.println ("Hello" + name);} public static void Main (string[] args) {endpoint.publish ("Http://192.168.0.2:40000/hello", New HelloService ()); SYSTEM.OUT.PRINTLN ("Server is listening ...");}}

service is listening ...

Test in the browser:

② the same cmd command parses the document's class or method [client]

Create a new project, use these classes, and test

　

MyTest Test class:

public class MyTest {public static void main (string[] args) {helloserviceservice service=new helloserviceservice (); HelloService hs = Service.gethelloserviceport (); Hs.say ("Tease");}}

　　

First knowledge of WebService