spring4. 3. Method of realizing cross domain CORS

First of all, my JDK is 1.8, Tomcat is 8.0, and my project is SSM + Maven.

Spring's framework is 4.3 When using, you only need to annotate @ crossorigin before the @ controller annotation of the controller, and then in springmvc XML configuration file add

Here is a screenshot of adding annotations to the controller layer

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