java - 方法形参上可以用多个@RequestBody吗，封装不同的对象

Question

在方法的形参那可以用多个@RequestBody来把json字符串封装成多个对象么？用一个@RequestBody.肯定可以，多个这个注解可以封装多个不同的对象么……

Answer 1

In fact, there is always one request parameter, because a request only contains one request body. If you understand this, you will understand that Spring MVC does not support multiple @RequestBody.

As for deserializing the content in a request body into several Java instances, it is another problem.
There are three solution directions:

1. Create a new entity and put your two entities in it. This is the simplest, but not "elegant" enough.

2. Use Map<String, Object> to accept the request body and deserialize it into each entity yourself.

3. Similar to method 2, but more generic, implement your own HandlerMethodArgumentResolver. Please refer to: https://sdqali.in/blog/2016/0...

Answer 2

Let’s list a business scenario