Improve the compatibility of fastjson1-compatible for issue #2673

core/src/main/java/com/alibaba/fastjson2/reader/FieldReader.java

@@ -441,7 +441,7 @@ protected void acceptAny(T object, Object fieldValue, long features) {
         }
 
         Object typedFieldValue;
-        if (fieldValue == null || fieldType == fieldValue.getClass()) {
+        if (fieldValue == null || fieldType == fieldValue.getClass() || fieldType == Object.class) {
             typedFieldValue = fieldValue;
         } else {
             if (fieldValue instanceof JSONObject) {

fastjson1-compatible/src/test/java/com/alibaba/fastjson2/issue_2600/Issue2673.java

@@ -0,0 +1,38 @@
+package com.alibaba.fastjson2.issue_2600;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONArray;
+import com.alibaba.fastjson.JSONObject;
+import lombok.Getter;
+import lombok.Setter;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author 张治保
+ * @since 2024/6/13
+ */
+public class Issue2673 {
+    @Test
+    void test() {
+        String jsonStr = "{\r\n"
+                + "  \"id\":\"01\",\r\n"
+                + "\"list\":[1,2,3],"
+                + "  \"data\":{\r\n"
+                + "      \"key\":\"test\"\r\n"
+                + "  }\r\n"
+                + "}";
+        JSONObject json = JSON.parseObject(jsonStr);
+        Bean bean = JSON.toJavaObject(json, Bean.class);
+        Assertions.assertDoesNotThrow(() -> (JSONObject) bean.getData());
+        Assertions.assertDoesNotThrow(() -> (JSONArray) bean.getList());
+    }
+
+    @Getter
+    @Setter
+    static class Bean {
+        private String id;
+        private Object data;
+        private Object list;
+    }
+}