是否可以为单个 Spring Rest 端点自定义 ObjectMapper?

问题描述

我知道如何自定义默认的 ObjectMapper bean.但是对于一个特定的控制器/端点，我想使用不同的对象映射器.我该怎么做?

I know how to customize the default ObjectMapper bean. But for one specific Controller/endpoint, I'd like to use a different objectmapper. How can I do this?

我认为我的问题类似于这个 one 但还没有答案.很高兴在那里得到答案并将其标记为重复

I think my question is similar to this one but there are no answers yet. Happy to get an answer there and mark this as duplicate

推荐答案

@xerx593 提供了一个很好的解决方案，链接在问题的评论中，但我采用了不同的方法，因为我返回的是一个通用的 Map<String，Object> graphql 返回类型，我对更改媒体类型或将对象映射器应用于所有 Map 感到不舒服.我更喜欢他们针对一般情况的解决方案，因为它更优雅

There's a good solution by @xerx593 linked in the question's comments but I took a different approach for mine because I was returning a generic Map<String,Object> graphql return type and I didn't feel comfortable changing the media-type or applying the object mapper to all Map's. I prefer their solution for the general case as it's more elegant

我只是将返回对象序列化为字符串并返回.

I simply serialized the return object as a string and returned it.

例如，我变成这样

@GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
public Foo getFoo() {
  return new Foo();
}

像这样

private ObjectMapper customMapper = ...;

@GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
public String getFoo() {
  return customMapper.writeValueAsString(new Foo());
}

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