SpringBoot集成Knife4j报错：文件上传不显示文件域问题的解决方案

import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

@RestController
@RequestMapping("/file")
public class FileController {

    @ApiOperation(value = "文件上传接口")
    @PostMapping("/upload")
    public String uploadFile(@RequestPart @RequestParam("file") MultipartFile file) {
        if (file.isEmpty()) {
            return "文件为空，请选择文件";
        }
        // 处理文件上传逻辑
        return "文件上传成功";
    }
}

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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
@EnableKnife4j
public class Knife4jConfig {

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.your.package"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("API 文档")
                .description("API 文档描述")
                .version("1.0")
                .build();
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .requestMatchers("/api/auth/**").permitAll()
            .requestMatchers("/doc.html", "/webjars/**", "/swagger-resources/**", "/v3/**").permitAll()
            .anyRequest().authenticated();
    }
}

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.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

import java.util.List;
import java.util.stream.Collectors;

@Configuration
public class Knife4jCompatibilityConfig {

    @Bean
    public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
        return new BeanPostProcessor() {
            @Override
            public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof RequestMappingHandlerMapping) {
                    customizeSpringfoxHandlerMappings(((RequestMappingHandlerMapping) bean).getHandlerMethods().keySet());
                }
                return bean;
            }

            private void customizeSpringfoxHandlerMappings(List<String> mappings) {
                List<String> copy = mappings.stream()
                        .filter(mapping -> !mapping.contains("PatternParser"))
                        .collect(Collectors.toList());
                mappings.clear();
                mappings.addAll(copy);
            }
        };
    }
}