bug fix for toJavaObject, fix issue #728

core/src/main/java/com/alibaba/fastjson2/JSON.java

@@ -2583,7 +2583,6 @@ static <T> T to(Class<T> clazz, Object object) {
      * @param clazz converted goal class
      * @deprecated since 2.0.4, please use {@link #to(Class, Object)}
      */
-    @Deprecated
     static <T> T toJavaObject(Object object, Class<T> clazz) {
         return to(clazz, object);
     }

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

@@ -214,6 +214,10 @@ public Object createInstance(Map map, long features) {
             return map;
         }
 
+        if (mapType == JSONObject.class) {
+            return new JSONObject(map);
+        }
+
         return map;
     }
 

core/src/main/java/com/alibaba/fastjson2/util/TypeUtils.java

@@ -241,6 +241,11 @@ public static <T> T cast(Object obj, Class<T> targetClass) {
             }
         }
 
+        if (obj instanceof Collection) {
+            ObjectReader objectReader = provider.getObjectReader(targetClass);
+            return (T) objectReader.createInstance((Collection) obj);
+        }
+
         throw new JSONException("can not cast to " + targetClass.getName() + ", from " + obj.getClass());
     }
 

core/src/test/java/com/alibaba/fastjson2/issues/Issue728.java

@@ -0,0 +1,46 @@
+package com.alibaba.fastjson2.issues;
+
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONArray;
+import com.alibaba.fastjson2.JSONObject;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class Issue728 {
+    @Test
+    public void test() {
+        String a = "{\"test\":\"123465\"}";
+        LinkedHashMap linkedHashMap = JSON.toJavaObject(a, LinkedHashMap.class);
+        JSONObject jsonObject = new JSONObject();
+        jsonObject.put("data", linkedHashMap);
+        Bean bean = jsonObject.toJavaObject(Bean.class);
+        assertNotNull(bean.data);
+        Object test = bean.data.get("test");
+        assertEquals("123465", test);
+    }
+
+    public static class Bean {
+        public JSONObject data;
+    }
+
+    @Test
+    public void test1() {
+        JSONObject jsonObject = new JSONObject();
+        ArrayList list = new ArrayList();
+        list.add("123465");
+        jsonObject.put("data", list);
+        Bean1 bean = jsonObject.to(Bean1.class);
+        ArrayList list1 = bean.data;
+        assertEquals(1, list1.size());
+        assertEquals(list.get(0), list1.get(0));
+    }
+
+    public static class Bean1 {
+        public JSONArray data;
+    }
+}