SpringBoot2.0 是基于 spring 5.0 实现的。
在Spring 5.0 中，已经将 WebMvcConfigurerAdapter 抽象类加上 @Deprecated 注解 记为过时。
下面的代码就是过时方法：
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/*** @author */@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter{@Autowiredprivate UserIDHandlerInterceptor userIDHandlerInterceptor;/*** addPathPatterns 添加拦截规则* excludePathPatterns 排除拦截规则** @param registry*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");}
}
我们来看看 WebMvcConfigurerAdapter 方法，上面已经加了@Deprecated 注解
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//package org.springframework.web.servlet.config.annotation;import java.util.List;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.lang.Nullable;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;/** @deprecated */
@Deprecated
public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer {public WebMvcConfigurerAdapter() {}public void configurePathMatch(PathMatchConfigurer configurer) {}public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {}public void configureAsyncSupport(AsyncSupportConfigurer configurer) {}public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {}public void addFormatters(FormatterRegistry registry) {}public void addInterceptors(InterceptorRegistry registry) {}public void addResourceHandlers(ResourceHandlerRegistry registry) {}public void addCorsMappings(CorsRegistry registry) {}public void addViewControllers(ViewControllerRegistry registry) {}public void configureViewResolvers(ViewResolverRegistry registry) {}public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {}public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {}public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {}public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {}public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {}public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {}@Nullablepublic Validator getValidator() {return null;}@Nullablepublic MessageCodesResolver getMessageCodesResolver() {return null;}
}
现在我们采用新的方法来处理：
方法一(官方推介)：
我们看到，WebMvcConfigurerAdapter 抽象类实现了 WebMvcConfigurer 接口，这里我们只需要将 extends WebMvcConfigurerAdapter 替换为 implements WebMvcConfigurer 即可。代码如下：
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/*** @author */@Configuration
public class WebAppConfig implements WebMvcConfigurer{@Autowiredprivate UserIDHandlerInterceptor userIDHandlerInterceptor;/*** addPathPatterns 添加拦截规则* excludePathPatterns 排除拦截规则** @param registry*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");}
}
方法二(不推介，也过期了)：
继承 WebMvcConfigurationSupport，代码如下：
package com.handlerinterceptor_demo.handlerinterceptor_demo.config;import com.handlerinterceptor_demo.handlerinterceptor_demo.interceptors.UserIDHandlerInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;/*** @author */@Configuration
public class WebAppConfig extends WebMvcConfigurationSupport{@Autowiredprivate UserIDHandlerInterceptor userIDHandlerInterceptor;/*** addPathPatterns 添加拦截规则* excludePathPatterns 排除拦截规则** @param registry*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(userIDHandlerInterceptor).addPathPatterns("/**/*");super.addInterceptors(registry);}
}PS：Java 毕竟单继承多实现，而且实现接口也是官方推介的做法。所以推介方法一。