Java Webflux：将文件和DTO传递到单个请求中

我需要传递文件（通过

表单数据
）和DTO。因此，我尝试做以下工作：

@PostMapping
公共Mono方法（@RequestPart（“文件”）通量文件，
Dto（Dto）{
返回Mono.empty（）；
}

并通过每个
Dto
字段的参数初始化
Dto

因此，我得到以下错误：

org.springframework.core.codec.CodecException: Type definition error: [simple type, class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.LinkedHashMap["errors"]->java.util.Collections$UnmodifiableList[0]->org.springframework.validation.FieldError["rejectedValue"])
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.LinkedHashMap["errors"]->java.util.Collections$UnmodifiableList[0]->org.springframework.validation.FieldError["rejectedValue"])

Content type 'multipart/form-data;charset=UTF-8;boundary=rh4lsv9DycBf8hpV2snhKfRjSrj1GvHzVy' not supported for bodyType=com.example.Dto

如果我完全删除
Dto
参数，图像将正确加载

将
@RequestBody
注释添加到
Dto
参数会产生以下错误：

org.springframework.core.codec.CodecException: Type definition error: [simple type, class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.LinkedHashMap["errors"]->java.util.Collections$UnmodifiableList[0]->org.springframework.validation.FieldError["rejectedValue"])
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader$SynchronossFilePart and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.LinkedHashMap["errors"]->java.util.Collections$UnmodifiableList[0]->org.springframework.validation.FieldError["rejectedValue"])

Content type 'multipart/form-data;charset=UTF-8;boundary=rh4lsv9DycBf8hpV2snhKfRjSrj1GvHzVy' not supported for bodyType=com.example.Dto

通过将
Dto
作为
@RequestParam（“Dto”）字符串Dto
传递并手动解析JSON来实现这一点，但这并不是一个完美的解决方案。
所以需要所谓的混合多部分

@PostMapping("/test")
public Mono<Void> method(@RequestPart("dto") Dto dto, @RequestPart("files") Flux<FilePart> files) {

    return Mono.empty();
}

注:

   Content-Type: application/json

对于dto零件，必须执行命令

看看这个答案：

您是否尝试为Dto添加
@RequestBody
？这对
字符串
部分有效，但在我的情况下，我遇到了此错误
内容类型'text/plain；bodyType=com.example.Dto不支持charset=UTF-8'将内容类型：application/json添加到Dto部件