使用@JsonSerialize(nullsUsing= JsonSerializerUtils.class)注解后报错

使用@JsonSerialize(nullsUsing= JsonSerializerUtils.class)注解后报错

org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Can not write a field name, expecting a value; nested exception is com.fasterxml.jackson.core.JsonGenerationException: Can not write a field name, expecting a value
    at org.springblade.core.tool.jackson.AbstractReadWriteJackson2HttpMessageConverter.writeInternal(AbstractReadWriteJackson2HttpMessageConverter.java:137) ~[blade-core-tool-2.1.0.jar:na]