spring 4.3.8 對應的springboot版本為 1.4.6

有時間整理。。。。。。

springboot 上傳檔案， 前端傳檔案時，後端使用MultipartHttpServletRequest 接收，發現檔案為null:

MultiValueMap<String, MultipartFile> multiFileMap = multipartRequest.getMultiFileMap();

專案中對於訊息轉換器的配置如下：

    @Bean(name = "jsonHttpMessageConverter")
    public MappingJackson2HttpMessageConverter jsonHttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter 
 
= new MappingJackson2HttpMessageConverter();
        converter.setPrefixJson(false);
        List<MediaType> mediaTypes = new ArrayList<>();
        mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        mediaTypes.add(MediaType.valueOf("text/json;charset=UTF-8"));
        converter.setSupportedMediaTypes(mediaTypes);
        
 
return converter;
    }

    @Bean
    public AnnotationMethodHandlerAdapter annotationMethodHandlerAdapter(
            @Qualifier("jsonHttpMessageConverter") MappingJackson2HttpMessageConverter jsonHttpMessageConverter) {
        AnnotationMethodHandlerAdapter handlerAdapter = new AnnotationMethodHandlerAdapter();
        MappingJackson2HttpMessageConverter[] converters 
 
= new MappingJackson2HttpMessageConverter[]{jsonHttpMessageConverter};
        handlerAdapter.setMessageConverters(converters);
        return handlerAdapter;
    }

    @Bean
    public CommonsMultipartResolver multipartResolver() {
        CommonsMultipartResolver resolver = new CommonsMultipartResolver();
        resolver.setDefaultEncoding("UTF-8");
        return resolver;
    }


我的問題解決方案：啟動類上  排除springboot 對於轉換器的自動配置

@SpringBootApplication(exclude={MultipartAutoConfiguration.class})