http://stackoverflow.com/questions/23469784/com-fasterxml-jackson-databind-exc-unrecognizedpropertyexception-unrecognized-f
ObjectMapper mapper = new ObjectMapper();
mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
mapper.setVisibilityChecker(VisibilityChecker.Std.defaultInstance().withFieldVisibility(JsonAutoDetect.Visibility.ANY));https://git-scm.com/book/zh/v2/Git-%E5%B7%A5%E5%85%B7-%E9%87%8D%E5%86%99%E5%8E%86%E5%8F%B2
