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springboot集成knife4j出现问题

• We’re sorry but knife4j-vue doesn’t work properly without JavaScript enabled. Please enable it to continue.

pom.xml

  <dependencies>
	  <dependency>
	      <groupId>org.springframework.boot</groupId>
	      <artifactId>spring-boot-starter-web</artifactId>
	      <version>2.3.12.RELEASE</version>
	  </dependency>
      <dependency>
          <groupId>io.springfox</groupId>
          <artifactId>springfox-boot-starter</artifactId>
          <version>3.0.0</version>
      </dependency>
      <dependency>
          <groupId>com.github.xiaoymin</groupId>
          <artifactId>knife4j-spring-boot-starter</artifactId>
          <version>3.0.3</version>
      </dependency>
 </dependencies>

配置类

package cn.osais.customer.config;

import io.swagger.annotations.ApiOperation;
import io.swagger.models.auth.In;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
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.oas.annotations.EnableOpenApi;
import springfox.documentation.service.*;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;

import java.util.ArrayList;
import java.util.List;

@EnableOpenApi
@Configuration
public class SwaggerConfig implements WebMvcConfigurer {

    /**
     * 是否开启swagger
     */
    @Value("${swagger.enabled:true}")
    private boolean enabled;
    /**
     * 是否开启knife4j
     */
    @Value("${knife4j.enabled:true}")
    private boolean knife4jEnabled;

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowCredentials(true)
                .allowedOrigins("*")
                .allowedMethods("*")
                .allowedHeaders("*")
                .exposedHeaders("*");
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    	// 添加资源映射
        if (enabled && knife4jEnabled) {
            registry.addResourceHandler("doc.html")
                    .addResourceLocations("classpath:/META-INF/resources/");
            registry.addResourceHandler("index.html")
                    .addResourceLocations("classpath:/META-INF/resources/");
            registry.addResourceHandler("swagger-ui.html")
                    .addResourceLocations("classpath:/META-INF/resources/");
            registry.addResourceHandler("/webjars/**")
                    .addResourceLocations("classpath:/META-INF/resources/webjars/");
        }
    }

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.OAS_30)
                .enable(enabled)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                .paths(PathSelectors.any())
                .build()
                .securitySchemes(securitySchemes())
                .securityContexts(securityContexts());
    }

    private List<SecurityScheme> securitySchemes() {
        List<SecurityScheme> apiKeyList = new ArrayList<SecurityScheme>();
        apiKeyList.add(new ApiKey("Authorization", "Authorization", In.HEADER.toValue()));
        return apiKeyList;
    }

    private List<SecurityContext> securityContexts() {
        List<SecurityContext> securityContexts = new ArrayList<>();
        securityContexts.add(
                SecurityContext.builder()
                        .securityReferences(defaultAuth())
                        .operationSelector(o -> o.requestMappingPattern().matches("/.*"))
                        .build());
        return securityContexts;
    }

    private List<SecurityReference> defaultAuth() {
        AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        List<SecurityReference> securityReferences = new ArrayList<>();
        securityReferences.add(new SecurityReference("Authorization", authorizationScopes));
        return securityReferences;
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("标题")
                .description("描述")
                .contact(new Contact("作者", null, null))
                .version("1.0.0")
                .build();
    }
}

问题

先说结论，头一天写好配置本地测试完后提交到代码仓库，第二天同事提交了一些拦截器的配置，手动合并代码后就出现这个报错。于是直接在本地拉取新分支，进行版本会退

• 首先把拦截器的注入都去掉，发现还是没用
• 接着又一个类一个类的排查，找到了问题类

问题类

ResponseBodyAdvice.java

import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@RestControllerAdvice
public class XXResponseAdvice implements ResponseBodyAdvice<Object> {
	...xxx

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
		// 返回参数进行全局转换
		// 1.为空，为数据包装了一层
        if (body == null) {
            return Result.ok(null);
        }

        // 2.如果是特定资源，又完整的返回出去
        if ("xxx".contains(request.getURI().toString())) {
            return body;
        }

		// 3.根据实例类型做判断返回
        if (body instanceof String) {
        	// 没看懂为什么要data.data包装一层
        	JSONObject obj = new JSONObject();
        	obj.add("data", body);
            return Result.ok(obj);
        } else if (body instanceof Result) {
            return body;
        } else {
            // 问题出在这一句，如果为swagger资源对象直接被包装了，获取不到数据
			return Result.ok(body);
        }
    }
}

文章来源:https://blog.csdn.net/qq_44896851/article/details/138966486
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