如何为 Java 中的“image/*”的 String.matches() 生成有效的正则表达式？

Question

In Spring Boot application, I am making an API which Accepts value in Request Header of type application/pdf or image/*.

@GetMapping(path = "/test, produces = { MediaType.APPLICATION_OCTET_STREAM_VALUE,
        MediaType.APPLICATION_PDF_VALUE, MediaType.IMAGE_PNG_VALUE, MediaType.APPLICATION_JSON_VALUE })
public ResponseEntity<?> getSomething( @RequestHeader(name = "Accept") @NotEmpty List<String> 
        acceptTypes)

I want to validate whether it contains any of image/* like image/png etc.

boolean acceptHeaderValid = false;
for (String acceptType : acceptTypes) {
    if (acceptType.matches("image/*") || acceptType.matches(MediaType.APPLICATION_PDF_VALUE)) {
          acceptHeaderValid = true;
          break;
    }
}

But when I send image/* in Accept header in Insomnia, acceptType.matches("image/*") evaluates to false. What is the mistake in the Regular Expression? Is there a more efficient way to do this?

Answer 1

It may not be very sophisticated, but an easy approach would be to just make use of String.startsWith Literally:

acceptType.startsWith("image/")