refactor: Extract number parsing logic into parseNumber method

Author: hyunmin0317

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/json/BasicJsonParser.java

@@ -72,19 +72,7 @@ private Object parseInternal(int nesting, String json) {
 		if (json.startsWith("\"")) {
 			return trimEdges(json, '"', '"');
 		}
-		try {
-			return Long.valueOf(json);
-		}
-		catch (NumberFormatException ex) {
-			// ignore
-		}
-		try {
-			return Double.valueOf(json);
-		}
-		catch (NumberFormatException ex) {
-			// ignore
-		}
-		return json;
+		return parseNumber(json);
 	}
 
 	private Map<String, Object> parseMapInternal(int nesting, String json) {
@@ -101,6 +89,18 @@ private Map<String, Object> parseMapInternal(int nesting, String json) {
 		return map;
 	}
 
+	private Object parseNumber(String json) {
+		try {
+			return Long.valueOf(json);
+		} catch (NumberFormatException e) {
+			try {
+				return Double.valueOf(json);
+			} catch (NumberFormatException ex) {
+				return json;
+			}
+		}
+	}
+
 	private static String trimTrailingCharacter(String string, char c) {
 		if (!string.isEmpty() && string.charAt(string.length() - 1) == c) {
 			return string.substring(0, string.length() - 1);