有什么方法可以在Java中的单个类，接口或注释中定义httpheaders？

Question

is there any way to define httpheaders in single class in java? It is something like creating a wrapper class for userdefined httpHeaders used in my application. instead of defining all headers in my controller method.

@PostMapping
public <ResponseEntity<Book>> getBooks(
   @ModelAttribute("requestContext") RequestContext context, @PathVariable("bookId") String bookId,
   @RequestHeader(value="x-institute-id") String instituteId,
   @RequestHeader(value="x-customer-last-logged-time") String xCustomerLastLoggedTime,
   @RequestHeader(value="x-customer-ip-address") String xCustomerIpAddress,
   @RequestHeader(value="x-interaction-id", required=false) String xInteractionId){

     ---implementation

   }

So that It can be interface or annotations. Like:

public class MyApplicationHeaders{
   @RequestHeader(value="x-institute-id") String instituteId,
   @RequestHeader(value="x-customer-last-logged-time") String xCustomerLastLoggedTime,
   @RequestHeader(value="x-customer-ip-address") String xCustomerIpAddress,
   @RequestHeader(value="x-interaction-id", required=false) String xInteractionId)
}

So that we can use it as :

@PostMapping
public <ResponseEntity<Book>> getBooks(
   @ModelAttribute("requestContext") RequestContext context, @PathVariable("bookId") String bookId, @MyApplicationHeaders appHeaders{

     ---implementation

   }

Answer 1

According to the docs of @RequestHeader

If the method parameter is Map<String, String> , MultiValueMap<String, String> , or HttpHeaders then the map is populated with all header names and values.

This means you can use either a Map or HttpHeaders as a parameter type to hold multiple header values. In your case, Map is applicable since you are working on non-standard headers:

@PostMapping
public ResponseEntity<Book> getBooks(
    @ModelAttribute("requestContext") RequestContext requestContext,
    @PathVariable("bookId") String bookId,
    @HttpHeaders Map<String, String> appHeaders) {

    String instituteId = appHeaders.get("x-institute-id");
    // do something else
}