🎨 Improving structure / format of the code.

pigx-common/pigx-common-security/src/main/java/com/pig4cloud/pigx/common/security/component/PigxWebResponseExceptionTranslator.java

@@ -89,10 +89,10 @@ public class PigxWebResponseExceptionTranslator implements WebResponseExceptionT
 
 		int status = e.getHttpErrorCode();
 		HttpHeaders headers = new HttpHeaders();
-		headers.set("Cache-Control", "no-store");
-		headers.set("Pragma", "no-cache");
+		headers.set(HttpHeaders.CACHE_CONTROL, "no-store");
+		headers.set(HttpHeaders.PRAGMA, "no-cache");
 		if (status == HttpStatus.UNAUTHORIZED.value() || (e instanceof InsufficientScopeException)) {
-			headers.set("WWW-Authenticate", String.format("%s %s", OAuth2AccessToken.BEARER_TYPE, e.getSummary()));
+			headers.set(HttpHeaders.WWW_AUTHENTICATE, String.format("%s %s", OAuth2AccessToken.BEARER_TYPE, e.getSummary()));
 		}
 
 		// 客户端异常直接返回客户端,不然无法解析