springboot 2.6.3整合swagger ui 3.0解决启动报错问题

一、由于我的springboot 还使用actuator，故不能采用治标不治本的配置办法。如下，

<!-- 引入 openfeign begin -->
<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-openfeign</artifactId>
   <version>3.1.1</version>
</dependency>
<!--用于检测系统的健康情况、当前的Beans、系统的缓存等-->
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- 引入 openfeign end -->

解决办法，治本办法：

　1.引入依赖

<!--begin 整合swagger-ui-->
<!-- https://mvnrepository.com/artifact/io.springfox/springfox-boot-starter -->
<dependency>
   <groupId>io.springfox</groupId>
   <artifactId>springfox-boot-starter</artifactId>
   <version>3.0.0</version>
</dependency>

<!--end 整合swagger-ui-->

2.在配置Swagger3Config中加入，

@Bean
public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
    return new BeanPostProcessor() {

        @Override
        public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
            if (bean instanceof WebMvcRequestHandlerProvider || bean instanceof WebFluxRequestHandlerProvider) {
                customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
            }
            return bean;
        }

        private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings) {
            List<T> copy = mappings.stream()
                    .filter(mapping -> mapping.getPatternParser() == null)
                    .collect(Collectors.toList());
            mappings.clear();
            mappings.addAll(copy);
        }

        @SuppressWarnings("unchecked")
        private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean) {
            try {
                Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
                field.setAccessible(true);
                return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
            } catch (IllegalArgumentException | IllegalAccessException e) {
                throw new IllegalStateException(e);
            }
        }
    };
}

3.加上注解

@EnableOpenApi  //访问地址：http://localhost:8688/swagger-ui/index.html

解决访问swagger ui 404问题，

-----------------------------------------------------详细如下--------------------------------------------------------------------------

package com.xc.mes.mesincomingmgr.config;


import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.oas.annotations.EnableOpenApi;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.spring.web.plugins.WebFluxRequestHandlerProvider;
import springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.lang.reflect.Field;
import java.util.List;
import java.util.stream.Collectors;

@Configuration
@EnableSwagger2
@EnableOpenApi  //访问地址：http://localhost:8688/swagger-ui/index.html
public class Swagger3Config  {

    protected ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("来料管理")
                .description("来料管理api")
                .version("2.0")
                .build();
    }
    @Bean
    public  Docket createRestApi(){
        return new Docket(DocumentationType.SWAGGER_2)
                .pathMapping("/")
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.soul"))
                .paths(PathSelectors.any())
                .build();
    }


    @Bean
    public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
        return new BeanPostProcessor() {

            @Override
            public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof WebMvcRequestHandlerProvider || bean instanceof WebFluxRequestHandlerProvider) {
                    customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
                }
                return bean;
            }

            private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings) {
                List<T> copy = mappings.stream()
                        .filter(mapping -> mapping.getPatternParser() == null)
                        .collect(Collectors.toList());
                mappings.clear();
                mappings.addAll(copy);
            }

            @SuppressWarnings("unchecked")
            private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean) {
                try {
                    Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
                    field.setAccessible(true);
                    return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
                } catch (IllegalArgumentException | IllegalAccessException e) {
                    throw new IllegalStateException(e);
                }
            }
        };
    }

}

处理跨域问题配置类，

//跨域访问配置
@Configuration
public class CorsConfig {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.setAllowCredentials(true);  //sessionid 多次访问⼀致
        // 允许访问的客户端域名
        List<String> allowedOriginPatterns = new ArrayList<>();
        allowedOriginPatterns.add("*");
        corsConfiguration.setAllowedOriginPatterns(allowedOriginPatterns);
//        corsConfiguration.addAllowedOrigin("*"); // 允许任何域名使⽤
        corsConfiguration.addAllowedHeader("*"); // 允许任何头
        corsConfiguration.addAllowedMethod("*"); // 允许任何⽅法（post、get等）
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); // 对接⼝配置跨域设置
        return new CorsFilter(source);
    }
}

标签：return,springboot,org,springframework,bean,ui,import,报错,springfox
来源： https://www.cnblogs.com/shaowangwu/p/16260653.html