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Post By Admin Last Updated At 2020-06-15
REST Web Services
REST Web Services:
Java Web Services

Java web administrations instructional exercise gives ideas and cases of two primary java web administrations programming interface. REST of JAX-WS and REST of JAX-RS. The java web benefit application can be gotten to by other programming dialects, for example, .Net and PHP.JAX-WS instructional exercise is gives ideas and cases of JAX-WS API. This JAX-WS instructional exercise is intended for amateurs and experts.

Java web benefit application performs correspondence through WSDL (Web Services Description Language). There are two essential for java web benefit source code: SOAP and RESTful.

Java Web Services APIThere are two essential API's portrayed by Java for making web advantage applications since JavaEE6.1) JAX-WS: for SOAP web organizations. The two ways to deal with form JAX-WS application code: by RPC style and Document style.2) JAX-RS: for RESTful web organizations. There are generally 2 utilizations at this moment being utilized for making JAX-RS application: Jersey and REST simple.JAX-WS is provides concepts and examples of JAX-WS API. This JAX-WS tutorial is designed for beginners and professionals.

JAVA Tutorial Video

[embed]https://www.youtube.com/watch?v=UbpbqqIw_3Q&t=1725s[/embed]RPC style:
  • RPC style web services use method name and parameters to generate XML structure.
  • The generated WSDL is difficult to be validated against schema.
  • In RPC style, SOAP message is sent as many elements.
  • RPC style message is tightly coupled.
  • In RPC style, SOAP message keeps the operation name.
  • In RPC style, parameters are sent as discrete values.
WSDL file:In WSDL file, it doesn't specify the type details.JAX-WS Example RPC Style:

Making JAX-WS illustration is a simple errand since it requires no additional design settings.JAX-WS API is inbuilt in JDK, so you don't have to stack any additional jug petition for it.

There are made 4 records for hi world JAX-WS illustration

HelloWorld.javaHelloWorldImpl.javaPublisher.javaHelloWorldClient.javaThe initial 3 documents are made for server side and 1 application for customer side.
JAX-WS Server Code
File: HelloWorld.java:
 package com.javaspot;import javax.jws.WebMethod;import javax.jws.WebService;import javax.jws.soap.SOAPBinding;import javax.jws.soap.SOAPBinding.Style;//Service Endpoint Interface@WebService@SOAPBinding(style = Style.RPC)public interface HelloWorld{@WebMethod String getHelloWorldAsString(String name);}File: HelloWorldImpl.java: package com.javaspot;import javax.jws.WebService;//Service Implementation@WebService(endpointInterface = "com.javatpoint.HelloWorld")public class HelloWorldImpl implements HelloWorld{@Overridepublic String getHelloWorldAsString(String name) {return "Hello World JAX-WS " + name;}}File: Publisher.java: package com.javaspot;import javax.xml.ws.Endpoint;//Endpoint publisherpublic class HelloWorldPublisher{public static void main(String[] args) {Endpoint.publish("http://localhost:7779/ws/hello", new HelloWorldImpl());}}How to view generated WSDLAfter running the publisher code, you can see the generated WSDL file by visiting the URLhttp://localhost:7779/ws/hello?wsdlJAX-WS Client Code File: HelloWorldClient.java package com.javaspot;import java.net.URL;import javax.xml.namespace.QName;import javax.xml.ws.Service;public class HelloWorldClient{public static void main(String[] args) throws Exception {URL url = new URL("http://localhost:7779/ws/hello?wsdl");QName qname = new QName("http://javaspot.com/", "HelloWorldImplService");Service service = Service.create(url, qname);HelloWorld hello = service.getPort(HelloWorld.class);System.out.println(hello.getHelloWorldAsString("javaspot rpc"));}} JAX-WS Example Document Style:Like RPC style, we can make JAX-WS case in report style. To do as such, you have to change just a single line in benefit interface.You have to utilize Style.DOCUMENT for @SOAPBinding comment set up of Style.RPC.Document: HelloWorld.java@SOAPBinding(style = Style.DOCUMENT)//It is changed from RPC to DOCUMENTPresently Let's see the full case of JAX-WS in record style.There are made 4 records for hi world JAX-WS archive style case.HelloWorld.javaHelloWorldImpl.javaPublisher.javaHelloWorldClient.javaThe initial 3 records are made for server side and 1 application for customer side.JAX-WS Server Code File: HelloWorld.java: package com.javaspot;import javax.jws.WebMethod;import javax.jws.WebService;import javax.jws.soap.SOAPBinding;import javax.jws.soap.SOAPBinding.Style;//Service Endpoint Interface@WebService@SOAPBinding(style = Style.DOCUMENT)public interface HelloWorld{@WebMethod String getHelloWorldAsString(String name);}File: HelloWorldImpl.java: package com.javaspot;import javax.jws.WebService;//Service Implementation@WebService(endpointInterface = "com.javaspot.HelloWorld")public class HelloWorldImpl implements HelloWorld{@Overridepublic String getHelloWorldAsString(String name) {return "Hello World JAX-WS " + name;}}File: Publisher.java: package com.javaspot;import javax.xml.ws.Endpoint;//Endpoint publisherpublic class HelloWorldPublisher{public static void main(String[] args) {Endpoint.publish("http://localhost:7779/ws/hello", new HelloWorldImpl());}}Now, it will generator 2 files:
  • SayHello
  • SayHelloResponse
Paste these files in com.javaspot directory and then run the publisher class.
JAX-WS Client Code
File: HelloWorldClient.java:
package com.javaspot;
import java.net.URL;import javax.xml.namespace.QName;import javax.xml.ws.Service;public class HelloWorldClient{public static void main(String[] args) throws Exception {URL url = new URL("http://localhost:7779/ws/hello?wsdl");QName qname = new QName("http://javaspot.com/", "HelloWorldImplService");Service service = Service.create(url, qname);HelloWorld hello = service.getPort(HelloWorld.class);system.out.println(hello.getHelloWorldAsString("javaspot document"));}}