Скачать или смотреть How to Generate All Required Classes in Spring Boot Using maven-jaxb2-plugin for WSDL Integration

Discover how to resolve the issue of missing class generation for requests and responses in Spring Boot when working with WSDL files using `maven-jaxb2-plugin`.
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Resolving Class Generation Issues in Spring Boot WSDL Integration

Integrating a WSDL (Web Services Description Language) file with a Spring Boot application can sometimes be a challenging task, especially when you are not seeing the expected results during the class generation process. Have you ever run into a situation where only some classes are generated while others are missing? If so, you are not alone. In this guide, we will explore a common problem often encountered when using the maven-jaxb2-plugin in a Spring Boot application and how to resolve it effectively.

The Problem: Missing Classes from WSDL

When working with an API provider's WSDL, developers may follow the standard guidelines but find that their generated classes do not include all necessary types. In one instance, a developer discovered that only the complex types were being generated, while input messages (which are necessary for requests) were left out. The issue was further complicated by the fact that the soapAction in the WSDL was set to an empty string, which Java's API considers an essential part of a SOAP call.

Analyzing the pom.xml File

Before addressing the solution, let's take a look at the relevant part of the pom.xml configuration for the maven-jaxb2-plugin:

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This configuration is crucial for the correct generation of classes from the WSDL, but if the WSDL itself is outdated or incorrectly formatted, it may lead to incomplete results.

The Solution: Modifying the WSDL

Update the WSDL Structure

The root cause of the issue was an outdated WSDL file. To resolve this, we decided to modify the WSDL and ensure that the elements for the requests and responses were defined as complex types. This change allows Jaxb to generate appropriate Java classes for those elements.

An example of the updated WSDL structure is as follows:

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Generate the Classes

Once the updates were made to the WSDL, we can regenerate the classes. Below are two Java classes generated from the modified WSDL:

LoginResponse.java:

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Login.java:

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Implementing the SOAP Call

Finally, although the soapAction was embedded in the WSDL as an empty string, it did not affect the functionality. Here’s how to implement the SOAP call:

[[See Video to Reveal this Text or Code Snippet]]

Important Note on Namespaces

When implementing these changes, make sure to adjust the namespace in your Java classes as per your use case. This is a critical step that can impact the communication between your SOAP client and server.

Conclusion

In this guide, we explored how to effectively resolve the problem of missing class generation during WSDL integration in Spring Boot using the maven-jaxb2-plugin. By updating the WSDL to define necessary parts as complex types, you can ensure that all required classes are generated, leading to a seamless integration with the SOAP API. If you ever face a similar issue, remember these steps to troubleshoot and resolve it efficiently.