add test

hutool-json/src/test/java/org/dromara/hutool/json/Issue3619Test.java

@@ -0,0 +1,25 @@
+package org.dromara.hutool.json;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class Issue3619Test {
+	@Test
+	public void parseObjTest() {
+		final String json = "{\"@timestamp\":\"2024-06-14T00:02:06.438Z\",\"@version\":\"1\",\"int_arr\":[-4]}";
+		final JSONConfig jsonConfig = JSONConfig.of().setKeyComparator(String.CASE_INSENSITIVE_ORDER);
+		final JSONObject jsonObject = JSONUtil.parseObj(json, jsonConfig);
+
+		final String jsonStr = jsonObject.toJSONString(0, pair -> {
+			final Object key = pair.getKey();
+			if(key instanceof String){
+				// 只有key为String时才检查并过滤，其它类型的key，如int类型的key跳过
+				return key.toString().equals("int_arr");
+			}else{
+				return true;
+			}
+		});
+
+		Assertions.assertEquals("{\"int_arr\":[-4]}", jsonStr);
+	}
+}