关闭spring boot jackson的FAIL_ON_EMPTY_BEANS

问题：

@Override
public AppFuneralInfoEntity getFuneralInfoById(Integer id) {
    return funeralInfoDao.getOne(id);
}

导致：

2019-03-12 15:11:43.551 ERROR 4948 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer]; nested exception is 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.zjhcsoft.bi.dingtalkfuneral.util.ServiceResult["result"]->com.zjhcsoft.bi.dingtalkfuneral.entity.AppFuneralInfoEntity_$$_jvst719_3["handler"])] with root cause

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.zjhcsoft.bi.dingtalkfuneral.util.ServiceResult["result"]->com.zjhcsoft.bi.dingtalkfuneral.entity.AppFuneralInfoEntity_$$_jvst719_3["handler"])
 

 

 

 

 

解决办法一

在实体类上面加上注解：

@JsonIgnoreProperties(value = {"handler","hibernateLazyInitializer","fieldHandler"})
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解决办法二

注册一个objectMapper覆盖掉默认的，这样就不用在每个类上面使用@JsonIgnoreProperties：

@Bean
public ObjectMapper objectMapper() {
     return new ObjectMapper().disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
}

// ObjectMapper为com.fasterxml.jackson.databind.ObjectMapper;
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测试结果如下：

对比解决方法一，在解析单个对象时返回的json中多了两个字段handler和hibernateLazyInitializer。

 

最快解决方法：

application.yml中增加

spring.jackson.serialization.fail_on_empty_beans=false