1.前言
Springboot2.0之前，实现拦截器功能的配置类是通过继承(extends)WebMvcConfigurerAdapter类完成的，最近项目把Springboot升级到了Springboot2.X，WebMvcConfigurerAdapter类已经不能使用了，查了资料说现在要通过实现(implements)WebMvcConfigurer接口来完成该功能。
这时候出现问题了，实现(implements)WebMvcConfigurer接口后，启动程序，程序运行过程中根本没走到该配置类和拦截器代码。
2.配置类WebMvcConfig
import com.xq.plugin.SecurityHandlerInterceptor;
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;
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
@Autowired
SecurityHandlerInterceptor securityHandlerInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(securityHandlerInterceptor).addPathPatterns("/**");
}
}
3.拦截器SecurityHandlerInterceptor
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class SecurityHandlerInterceptor implements HandlerInterceptor {
private static final Log log = LogFactory.getLog(SecurityHandlerInterceptor.class);
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
HandlerMethod handlerMethod = null;
if (handler instanceof HandlerMethod) {
handlerMethod = (HandlerMethod) handler;
}
if (handlerMethod == null) {
return true;
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
if (log.isDebugEnabled()) {
log.debug(SecurityHandlerInterceptor.class.getSimpleName() + "postHandle方法");
}
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
if (log.isDebugEnabled()) {
log.debug(SecurityHandlerInterceptor.class.getSimpleName() + "afterCompletion方法");
}
}
}
4.失效原因
原来SpringBoot做了这个限制，只有当WebMvcConfigurationSupport类不存在的时候才会生效WebMvc自动化配置，因为我在写swagger配置类时继承(extends)了WebMvcConfigurationSupport类，所以实现(implements)了WebMvcConfigurer接口的WebMvcConfig配置类没有生效。
原swagger配置类代码：
import com.xq.common.constants.AppConstants;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@Configuration
@EnableSwagger2
public class Swagger2Config extends WebMvcConfigurationSupport {
//因为swagger与静态文件访问配置冲突，所以整合swagger需要
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
// springboot 集成swagger2.2后静态资源404，添加如下两行配置
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
super.addResourceHandlers(registry);
}
@Bean
public Docket customDocket() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.groupName("xq")
.select()
.apis(RequestHandlerSelectors.basePackage("com.xq.yexiong.controller"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title(AppConstants.app+"的API接口")
.version("1.0")
.build();
}
}
5.解决方法
解决方法很简单，就是让swagger配置类不再继承(extends)WebMvcConfigurationSupport类，也去实现(implements)WebMvcConfigurer接口即可。
新swagger配置类代码：
import com.xq.common.constants.AppConstants;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@Configuration
@EnableSwagger2
public class Swagger2Config implements WebMvcConfigurer {
//因为swagger与静态文件访问配置冲突，所以整合swagger需要
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
// springboot 集成swagger2.2后静态资源404，添加如下两行配置
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
//super.addResourceHandlers(registry);
}
@Bean
public Docket customDocket() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.groupName("xq")
.select()
.apis(RequestHandlerSelectors.basePackage("com.xq.yexiong.controller"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title(AppConstants.app+"的API接口")
.version("1.0")
.build();
}
}
6.总结
springBoot2.0以上 WebMvcConfigurerAdapter 方法过时，有两种替代方案：
1、继承WebMvcConfigurationSupport
2、实现WebMvcConfigurer
但是继承(extends)WebMvcConfigurationSupport类会让Springboot对WebMvc自动化配置失效。所以项目中不能同时使用。
参考文档：https://www.cnblogs.com/sueyyyy/p/11611676.html
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