目录一、拦截器的作用与执行时机二、实现步骤步骤1：创建自定义拦截器步骤2：注册拦截器到Spring MVC步骤3：测试Controller三、关键配置详解四、常见使用场景五、拦截器 vs 过滤器（Filter）六、最佳实践七、Handler
Heres the scenario: User comes to my website and opens a webpage with some javascript functionality. User edits the data through javascript
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