我使用带有WebFlux的Spring boot 2.0.1作为Rest服务器。

在我RestController我想自动反序列化一个对象（产品）。但是我得到一个杰克逊错误，好像参数名称模块没有注册。

原因：com.fasterxml.jackson.databind.exc.Invalid定义异常：无法构建com.truc.产品的实例（没有像默认构造一样的Creator）：无法从对象值（没有基于委托或属性的Creator）反序列化[Source： UNKNOWN； line：-1，列：-1]在com.fasterxml.jackson.databind.exc.Invalid定义xception.from（Invalid定义xception.java:67）在com.fasterxml.jackson.databind.DeseriazationContext.reportBad定义（DeseriazationContext.java:1451）在com.fasterxml.jackson.databind.DeseriazationContext.handleMisSingInstantiator（com.fasterxml.jackson.databind.deser.BeanDeseriazerBase.deserializeFromObjectUSingNonDefault（BeanDeseriazerBase.java:1290）com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject（BeanDeserializer.java:326）com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize（BeanDeserializer.java:159）在com. faerxml. jackson.数据库。ObjectReader._bind（ObjectReader. java： 1574），网址为com. fast erxml. jackson.数据库。ObjectReader. readValue（ObjectReader. java： 965）在org. springframework. http. codec. json。AbstractJackson2Decoder. lambda$decdeInternal0美元（AbstractJackson2Decoder. java： 113）...省略了287个常见帧

我的pom中有jackson模块参数名

 <dependency>
     <groupId>com.fasterxml.jackson.module</groupId>
     <artifactId>jackson-module-parameter-names</artifactId>
 </dependency>

这是RestController中的路径

@ResponseStatus(HttpStatus.CREATED)
@RequestMapping(method = RequestMethod.POST)
public Mono<Entity<Product>> postProduct(@RequestBody Product product) {
    return productService.insert(product);
}

如果我尝试手动反序列化，它会起作用：

@Autowired
private ObjectMapper objectMapper;
...
@ResponseStatus(HttpStatus.CREATED)
@RequestMapping(method = RequestMethod.POST)
public Mono<Entity<Product>> postProduct(ServerWebExchange exchange) {
    return exchange.getRequest().getBody()
            .last().flatMap(buffer -> {
        try {
            Product product = objectMapper.readValue(buffer.asInputStream(), Product.class);
            return productService.insert(product);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    });
}

这是我的产品。班

package com.truc;

import java.time.LocalDate; import java.util.Optional;

public final class Product {
    public static final String PREFIX = "PT";

    public final String description;
    public final String shortDescription;
    public final String sku;
    public final float weight;
    public final LocalDate newSince;
    public final LocalDate newUntil;
    public final Status status;
    public final Visibility visibility;
    public final String metaKeywords;

    public Product(String description, String shortDescription, String sku, Float weight,
                   LocalDate newSince, LocalDate newUntil, Status status, Visibility visibility, String metaKeywords) {
        this.description = description;
        this.shortDescription = shortDescription;
        this.sku = sku;
        this.weight = Optional.ofNullable(weight).orElse(0f);
        this.newSince = newSince;
        this.newUntil = newUntil;
        this.status = status;
        this.visibility = visibility;
        this.metaKeywords = metaKeywords;
    }

    public enum Status {
        ACTIVE, INACTIVE
    }

    public enum Visibility {
        FULL, CATALOG, SEARCH, NONE
    } 
}

如果我明白了jackson-数据库2.9之后不需要@JsonCreator，我使用jackson2.9.5

如果我添加@JsonCreator我得到一个新的错误415不支持的内容类型'应用程序/json'...

我不明白我错在哪里？

谢啦