最近在做查询的数据遇到如下报错：
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.xwj.entity.UserEntity_$$_jvst57f_0["handler"])
仔细看红色字体部分，发现是实体类中有的字段值为null，所以在json化的时候，fasterxml.jackson将对象转换为json报错
解决办法：
在实体类上面加上注解 @JsonIgnoreProperties(value = { "hibernateLazyInitializer", "handler" })
