使用@RequestBody接收List<T>时遭遇Jackson反序列化错误求助

错误原因 #

你的接口方法声明接收List<EstatePropertyCreatorDto>类型的请求体，意味着Jackson期望直接解析JSON数组，但你实际发送的是一个包含estateProperties数组的JSON对象，类型不匹配导致反序列化失败。

解决方案（二选一） #

方案1：修改请求体为直接数组格式

把请求体外层的对象包裹去掉，直接传数组：

[
    {
        "id": "8bd050b0-6578-443a-8e22-bf48318734ce",
        "title": "test title",
        "type": "APARTMENT",
        "floor": "5",
        "details": "This details should be aware of!"
    },
    {
        "id": "69786c5f-e35a-476d-82de-1d5833a12818",
        "title": "test title for 2nd",
        "type": "GARAGE",
        "alias": "jamie garage",
        "floor": "1",
        "details": "Details for Jamie Garage"
    },
    {
        "id": "c935f330-eebe-4d35-818d-d2248fc8ca9e",
        "title": "test title for 3rd",
        "type": "OFFICE",
        "floor": "2",
        "details": "Details for Jamie office",
        "commonParts": "Office common parts"
    }
]

方案2：后端创建包装类适配现有请求格式

如果前端无法修改请求体结构，就创建一个包装DTO来接收整个对象：

@Getter
@Setter
@NoArgsConstructor
public class EstatePropertyListDto {
    private List<EstatePropertyCreatorDto> estateProperties;
}

然后修改控制器方法的参数类型：

@PostMapping("/{buildingId}/properties")
public List<EstatePropertyCreatorDto> addPropertiesToBuilding(@PathVariable UUID buildingId, @RequestBody EstatePropertyListDto propertyList) {
    buildingService.addPropertiesToBuilding(buildingId, propertyList.getEstateProperties());
    // 后续实现返回逻辑
    return List.of();
}

内容的提问来源于stack exchange，提问作者martoiliev