我正在尝试反序列化 Jackson Multimap
//given
val newUser = NewUserDTO(ALREADY_TAKEN_USERNAME, ALREADY_TAKEN_EMAIL,"qddqwdW221QZ&^$!")
//when
val response = restTemplate.exchange("http://localhost:${port}/user", HttpMethod.POST, HttpEntity(newUser), typeReference())
//then
Assertions.assertEquals(HttpStatus.UNPROCESSABLE_ENTITY, response.statusCode)
我得到一个异常(exception):
Type definition error: [simple type, class io.vavr.collection.Multimap]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `io.vavr.collection.Multimap` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
at [Source: (PushbackInputStream); line: 1, column: 1]
org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class io.vavr.collection.Multimap]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `io.vavr.collection.Multimap` (no Creators, like default constructor, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
at [Source: (PushbackInputStream); line: 1, column: 1]
有趣的是，如果我使用 String 来保存它的值并使用注入(inject)的 ObjectMapper，我可以反序列化响应
我该怎么办？
最佳答案
好吧，那是我的错。我用过TestRestTemplate，就像文档描述的那样，我应该自己配置那个bean:
If you need customizations (for example to adding additional message converters) use a RestTemplateBuilder @Bean.
我假设 RestTemplateBuilder 使用相同的 RestTemplate，因此如果为 RestTemplate 注册了一个模块，则应该为 RestTemplateBuilder 注册它
关于spring - 使用 RestTemplae 获取 vavr Multimap 后的反序列化错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62161189/