Скачать или смотреть Resolving the cvc-complex-type.2.4.c Error in Spring MVC: Fixing the aop:scoped-proxy Issue

Learn how to fix the `cvc-complex-type.2.4.c` error in your Spring MVC application by adjusting the schema locations in your XML configuration file.
---
This video is based on the question https://stackoverflow.com/q/64285915/ asked by the user 'Nuñito Calzada' ( https://stackoverflow.com/u/4450024/ ) and on the answer https://stackoverflow.com/a/64289305/ provided by the user 'kriegaex' ( https://stackoverflow.com/u/1082681/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'aop:scoped-proxy'

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Solving the cvc-complex-type.2.4.c Error in Spring MVC

If you're working with a Spring MVC project and have encountered the frustrating error:

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

You're not alone. Many developers run into this issue, especially when configuring beans in the servlet.xml file. Let’s break down the problem and explore how to resolve it.

Understanding the Error

This error typically occurs due to an issue with XML schema definitions (XSDs) not being properly mapped. The aop:scoped-proxy element is a part of the Spring AOP framework, and if the corresponding schema isn't correctly declared, it leads to this error.

Example of the Problematic XML Configuration:

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

Steps to Resolve the Issue

To rectify the error, you need to ensure that the XML schema locations are organized correctly. Here's how:

Step 1: Adjust the Schema Location

The critical adjustment required is to rearrange the xsi:schemaLocation entries. You should move the spring-tx.xsd declaration to immediately follow the tx entry:

Corrected XML Configuration:

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

Step 2: Verify in Your IDE

After making this change, it’s a good idea to check in your IDE (like IntelliJ IDEA). The elements should now properly highlight, signifying they're correctly recognized:

AOP elements change from grey to green (indicating they are parsed correctly).

Step 3: Retrun to Testing

Now, save your changes and rerun your test. The error should be resolved, and your Spring MVC application will now successfully recognize the aop:scoped-proxy.

Conclusion

Errors like cvc-complex-type.2.4.c can be a source of frustration during development. However, by properly configuring your XML files and understanding the relationships between different XML namespaces and schemas, you can quickly resolve these issues.

Remember: Always ensure your schema locations are ordered correctly in your Spring project to avoid such pitfalls in the future. Happy coding!