Technologies / Programming

Web Services on the Java Platform — SOAP (JAX-WS) and REST (JAX-RS) in Practice

A two-day training on web services in Java — SOAP/WSDL (JAX-WS), REST/JSON (JAX-RS), JAXB, code generation, proxy client and testing in SOAP UI. For Java developers building integrations.

Web services are the language of integration — and Java speaks two dialects: SOAP and REST

Enterprise systems do not live in isolation. The ERP connects to the CRM, the CRM to the customer portal, the portal to the payment system. The language of this communication is web services: SOAP (formal, WSDL, enterprise) and REST (lightweight, JSON, modern). Java offers standards for both: JAX-WS (SOAP) and JAX-RS (REST). The problem: developers know one approach and do not understand the other — whereas real-world enterprise work demands both.

Two days: from SOAP/WSDL (JAX-WS, JAXB, top-down/bottom-up, proxy client, SOAP UI) to REST/JSON (JAX-RS, paths, parameters, data formats, REST client). Plus a comparison of the two approaches and criteria for choosing between them.

Who is this training for?

For Java developers building integrations. Especially if you:

Build integrations between systems and need to implement both SOAP (legacy) and REST (new) services
Maintain legacy SOAP services and plan a migration to REST — you need to know both approaches
Are starting out with web services in Java and want to master JAX-WS and JAX-RS in one intensive course

Two days: from SOAP to REST

Day 1: SOAP — XML, SOAP messages, WSDL, testing in SOAP UI, JAX-WS (top-down and bottom-up), JAXB (XML↔Java mapping), proxy client.

Day 2: REST — the concept (resources, URIs, statelessness), HTTP methods, JAX-RS (paths, parameters, formats), JSON serialization (Jackson, JSON-B), REST client. SOAP vs REST — comparison and migration.

With over 2,500 trainings in our portfolio, EITT is a trusted partner in competency development. Contact us — we run closed Java web services trainings for development teams.

Benefits

Build SOAP services in Java with JAX-WS — top-down and bottom-up approaches
Understand WSDL and SOAP — message structure, operations, types
Map XML to Java objects with JAXB — annotations, customizing the format
Implement REST services with JAX-RS — resources, paths, parameters, data formats
Build web service clients — SOAP proxy and REST client
Test web services in SOAP UI and choose the right approach (SOAP vs REST) for the context

Who is this training for?

Java developers building system-to-system integrations with web services

Backend developers implementing SOAP and REST APIs in enterprise applications

IT architects designing communication between microservices and legacy systems

Developers maintaining legacy SOAP services and migrating them to REST

Integration testers testing web services (SOAP UI, REST)

Junior Java developers learning to build web services

Prerequisites

Basic knowledge of Java (classes, interfaces, collections)
Basic understanding of the HTTP protocol (methods, status codes, headers)
Familiarity with XML is a plus (we cover the basics during the training)

Training program

XML fundamentals — structure, namespaces, validation
SOAP messages — request, response, error information (SOAP Fault)
WSDL, the Web Services Description Language — structure, operations, types
Testing SOAP requests in SOAP UI
JAX-WS — building web services in Java
Top-down approach — generating Java from WSDL
Bottom-up approach — generating WSDL from Java
JAX-WS annotations and customizing service details
JAXB — XML↔Java mapping, annotations, customizing the format
Client side — generating access classes, proxy client

The REST service concept — resources, URIs, statelessness
URL structure and HTTP methods (GET, POST, PUT, DELETE)
JAX-RS — building REST services in Java
Handling paths and parameters (@Path, @QueryParam, @PathParam)
Handling data formats — text, XML, JSON, binary data
Serialization and deserialization — Jackson, JSON-B
Client side in JAX-RS — building a REST client
SOAP vs REST — when to use which, migrating legacy services

Delivery Methods

Online

Convenience of participating from anywhere
Interactive live sessions with trainer
Materials available for 30 days
No travel costs

On-site

Direct contact with trainer and group
Intensive hands-on workshops
Networking with other participants
Full focus on learning

Training Topics

Frequently asked questions

Does this training cover Spring Boot / Spring Web?

No — the training focuses on the Java EE standards: JAX-WS (SOAP) and JAX-RS (REST). Spring has its own abstractions (RestTemplate, WebClient, Spring WS). If you are looking for Spring training, contact us for a dedicated program.

Is SOAP still relevant?

Yes — in enterprise settings (banking, insurance, legacy integrations). New projects usually choose REST, but Java developers regularly work with existing SOAP services. The training teaches both approaches and helps with migration.

What is the format and duration of the training?

The training lasts 2 days (9:00-16:00) and is available online and on-site. Intensive workshops — from your first SOAP service to a REST API.

Will I receive a certificate after the training?

Yes, every participant receives a personal certificate of completion issued by EITT.