Could not write JSON: No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazy

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在学习spring boot时根据id获取一个对象时出现以下异常（返回的是json格式）：

{"timestamp":1500972035655,"status":500,"error":"Internal Server Error","exception":"org.springframework.http.converter.HttpMessageNotWritableException","message":"Could not write JSON: 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); nested exception is com.fasterxml.jackson.databind.JsonMappingException: 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.springboot.domain.Girl_$$_jvst3_0[\"handler\"])","path":"/girls/id/2"}

解决办法：在对应的实体类上加上

@JsonIgnoreProperties({"hibernateLazyInitializer","handler"})注解

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