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Writing a simple java client which uses soap messages for bunch of provided WSDL and XSD files?

I want to write a java client to use some medical api. On there website they have uploaded a bunch of WSDL files and corresponding XSD files, along with documentation explaining the SOAP messages format to consume each service.
In past I have used REST API of Amazon and Azure to write java client but this seems to be different.
I have read about JAX-WS and also tried to create a dynamic web project in Eclipse using Tomcat but nothing working (https://wiki.eclipse.org/Creating_a_Java_Web_Service_Client).
Could some one explain me basic steps on how to write a simple java
client to **consume these WSDL and XSD files using SOAP messages** and
point me to really good tutorial where I can understand the underlying
concepts?
Till now:
I read about basic wsdl and xsd structure.
Tried to use Postman and SoapUI to make service call to these services.
But struggling to make first step towards making a simple java client project to interact with these services.

I would recommend you go check SAAJ API

How to use "web service client" in java

I wanna create a web service client to send some XML data to other web service. Google for the solution for a while but can’t find the correct answer. Now I suffered problem is how to import the WSDL file or ws-addressing to the workspace (if necessary)?
When I used eclipse built-in method to create a web service client it will automatically create some source code (Tomcat v7.0 Apache Axis2). How to use it to connect to other service and should I fallow the XML schema?
Here is the example below
http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.jst.ws.cxf.doc.user%2Ftasks%2Fcreate_client.html
When I used some source code that I search from internet. The code looks like create a XML by itself. How to I follow the XML schema according to this code?
Here is the example below Working Soap client example
Hopefully someone may give me some clues or more detail information.

Try to use Jaxb & jax-ws which enable to generate and client stub from your WSDL and all XSD dependencies (if reachable). You will have java beans for all objects that will be passed in arguments (ie Jaxb will handle the XML conversion).
you can also refer to this thread: Web service client given WSDL

If you are comfortable using Spring and Maven , find below link which might be useful :
https://spring.io/guides/gs/consuming-web-service/

Building Web-Service client from existing WSDL file using java

I've been tasked with building a web service in java, and I've been given an existing WSDL file which seems to define everything. I need to build my java around/using this (Not consuming it though) . How would I go about using this in eclipse?
I've tried going "New Web Service Client" and selecting the WSDL However the code it generates doesn't include any of the methods (which is just 1) or the parameters from the WSDL.

You can use Apache CXF WSDL to Java for doing this thing.Look at here Click here and also google it for more details
Also you can use SoapUi for doing this. I think soapUi way is more easy than the previous method click for soapUI tutorial
WSDL consist every detail about how your web service should look like and the functionality

I think if you're trying to write the web service using an existing WSDL, you're probably going about it the wrong way. It looks like from the command that it's trying to build you a client, not a server.
I had some luck with the WSDL-first tutorial in the Spring-WS library. I would take a look at that.
http://static.springsource.org/spring-ws/site/reference/html/tutorial.html

creating web service client from eclipse

Hi I am new to SOAP web services and trying to create a client. I am following This tutorial but the problem which I am facing is Sometimes it generates the client stub in the form of .java files and sometimes it generates proper client with some .jsp pages like test.jsp, intput.jsp etc.
I have tried searching a lot on internet. Please let me know why it generates two different kind of clients though I am following the same process.
I have generated my client using wsimport but I just want to know, what is causing eclipse to generate two different clients at different times. may be some bug or some detail that I have missed.

The difference is most likely caused by selecting a different value in step 6 of the tutorial, when you select which kind of client should be generated: Move the Client slider to the Test Client position .

When you run the Eclipse WTP wizard, you get to choose which client you want to have. The JSPs that are generated are simply an input test form to test your web service.

how to use a webservice which created on c#t at java platform

Previous developers created a webproject which consumes a webservice in .net platform and they wanted me to use this webservice on jsp. I read netbeans tutorials and find out that webservice is irrelevant to platform. However the problem is at .net project I could not find a file whose extension is .wsdl or a werbservice.amsx.There is a service.cs which was implemented has webservice commands a lot.How i can consume or use this service on a jsp file? I would be appreciated if you can help me. Because it takes my hours to read documentations and I do not have any clue how to use it on .jsp.
Best Regards
Altaico

Read this detailed tutorial on C-sharpcorner.com on how to reference and use asmx web services in JSP

For Web Services in general to function correctly you need to have a WSDL. Most modern web service stacks can generate these automatically.
Have a closer look.

Try to call the asmx file from your browser with ?wsdl query string.