@RequestBody is an important key word in Spring Boot, which will define the data style in transaction.
Without @RequestBody, data will be passed as key-value. Data will be passed in JSON when use @RequestBody.
When use @RequestBody several times at one time, the last one will take effect while the others don't.
Although it seems correct in swagger view. In the process of debugging, the second takes effect while the first one does not.
