你应该创建特定的Map类型并将其提供给反序列化过程:
TypeFactory typeFactory = mapper.getTypeFactory();MapType mapType = typeFactory.constructMapType(HashMap.class, String.class, Theme.class);HashMap<String, Theme> map = mapper.readValue(json, mapType);

你应该创建特定的Map类型并将其提供给反序列化过程:
TypeFactory typeFactory = mapper.getTypeFactory();MapType mapType = typeFactory.constructMapType(HashMap.class, String.class, Theme.class);HashMap<String, Theme> map = mapper.readValue(json, mapType);