由网友(囚)分享简介：当我希望它使用@RequestBody 注释直接映射到我的Java pojo 时，我找不到关于如何在我的json 帖子中格式化地图的好答案.我假设 json 看起来像:I can't find a good answer as to how to format a map in my json post when I...

当我希望它使用@RequestBody 注释直接映射到我的Java pojo 时，我找不到关于如何在我的json 帖子中格式化地图的好答案.我假设 json 看起来像:

I can't find a good answer as to how to format a map in my json post when I want it to map directly to my Java pojo with the @RequestBody annotation. I'm assuming the json would look something like:

{
    "myInt":"10",
    "myMap":"{1:"A"}"
}

我的 pojo 将有一个 myInt 字段和一个 myMap 字段.myMap 字段的类型为 Map

My pojo would have a myInt field and a myMap field. The myMap field is of type Map<Integer,String>

地图的 json 是什么样子才能让它工作?

What does the json for the map look like to get this to work?

推荐答案

根据你的 JSON 结构 myMap 是一个 String.但是，即使您从 myMap 的值中删除引号，您也会发现 {1:"A"} 不是有效的 JSON，有效的 JSON 语法要求所有属性键是字符串.一个有效的 JSON 结构看起来像 {"1":"A"}.反序列化器应该能够将密钥强制转换为 Integer，所以 Map 就可以了.

According to your JSON structure myMap is a String. However, even if you remove the quotes from the value of myMap you will find that {1:"A"} is not valid JSON, valid JSON syntax requires that all property keys are strings. A valid JSON structure would look like {"1":"A"}. The deserializer should be able to coerce the key into an Integer, so Map<Integer, String> is fine.