Java Stash

Web Development

Java CORS

Handling CORS

Java CORS enables cross-origin requests with Spring middleware.

Understanding CORS

Cross-Origin Resource Sharing (CORS) is a mechanism that allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served. This is crucial for enabling web applications to interact with resources hosted on different domains.

Configuring CORS in Spring Boot

Spring Boot provides a simple way to configure CORS globally for your application using the @CrossOrigin annotation or by defining CORS mappings in a WebMvcConfigurer. This allows your application to specify which domains are permitted to access the resources.

Using the @CrossOrigin Annotation

The @CrossOrigin annotation can be applied at the controller or handler method level to specify allowed origins, HTTP methods, and headers. Here's an example of how to use @CrossOrigin at the controller level:

Global CORS Configuration

For a more centralized approach, you can configure CORS globally by implementing the WebMvcConfigurer interface. This method allows you to define CORS mappings across your entire application:

Testing CORS Configuration

Once you have configured CORS, it's important to test that the setup is correctly allowing cross-origin requests as expected. You can test this using tools like Postman or by making AJAX requests from a client-side application hosted on a different domain.

Web Development

Next
Hibernate