由于最近的Java升级，我们无法序列化从SQL数据库读取的对象，该数据库的值Map到java.sql.Timestamp。底层数据库是SAP Database，我们的客户能够用像Select getdate()这样简单的查询重现这个问题。
环境：Java 17.0.4.1，Eclipse插件，Mac OS X 14.0
我们不能添加add-opens=java.sql=ALL-UNNAMED或类似的东西。我还尝试在Gson库中调试TypeAdapterRuntimeTypeWrapper，发现java.sql.Timestamp对象使用了“反射适配器”。
作为一种变通方法，我现在使用Jackson库作为后备，它能够毫无问题地序列化我的对象（即下面代码中的第二个try子句可以毫无问题地工作）：

try {
    json = GSON.toJson(object);
} catch (Exception e) {
    log.warn("Failed to serialize JSON. Trying alternative serializer (1).", e);
    try {
        json = new ObjectMapper().writeValueAsString(object);
    } catch (Exception e1) {
        log.warn("Failed to serialize JSON. Leaving null.", e);
    }
}

字符串
堆栈跟踪：

com.google.gson.JsonIOException: Failed making field 'java.sql.Timestamp#nanos' accessible; either increase its visibility or write a custom TypeAdapter for its declaring type.
    at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:38)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:286)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
    at com.google.gson.Gson.getAdapter(Gson.java:556)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:55)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:207)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:144)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:70)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:70)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:207)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:144)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:70)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:70)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:207)
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:144)
    at com.google.gson.Gson.toJson(Gson.java:842)
    at com.google.gson.Gson.toJson(Gson.java:812)
    at com.google.gson.Gson.toJson(Gson.java:759)
    at com.google.gson.Gson.toJson(Gson.java:736)

Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.sql.Timestamp.nanos accessible: module java.sql does not "opens java.sql" to unnamed module @2554782d
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
    at java.base/java.lang.reflect.Field.checkCanSetAccessible(Unknown Source)
    at java.base/java.lang.reflect.Field.setAccessible(Unknown Source)
    at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:35)

的数据
有什么想法吗？