> For the complete documentation index, see [llms.txt](https://ethan-lin.gitbook.io/spring-mvc-documentation-linesh-translation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ethan-lin.gitbook.io/spring-mvc-documentation-linesh-translation/part-ii-wen-dang-nei-rong-documentation-contents/configuring-spring-mvc/5-interceptors.md).

# 拦截器

你可以配置处理器拦截器`HandlerInterceptors`或web请求拦截器`WebRequestInterceptors`等拦截器，并配置它们拦截所有进入容器的请求，或限定到符合特定模式的URL路径。

在MVC Java编程配置下注册拦截器的方法：

```java
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LocaleInterceptor());
        registry.addInterceptor(new ThemeInterceptor()).addPathPatterns("/**").excludePathPatterns("/admin/**");
        registry.addInterceptor(new SecurityInterceptor()).addPathPatterns("/secure/*");
    }

}
```

在MVC XML命名空间下，则使用`<mvc:interceptors>`元素：

```markup
<mvc:interceptors>
    <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
    <mvc:interceptor>
        <mvc:mapping path="/**"/>
        <mvc:exclude-mapping path="/admin/**"/>
        <bean class="org.springframework.web.servlet.theme.ThemeChangeInterceptor"/>
    </mvc:interceptor>
    <mvc:interceptor>
        <mvc:mapping path="/secure/*"/>
        <bean class="org.example.SecurityInterceptor"/>
    </mvc:interceptor>
</mvc:interceptors>
```