SpringBoot，Controller和Jackson的ObjectMapper

错误描述

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.hibernate.proxy.pojo.bytebuddy.ByteBuddyInterceptor and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.book.springtest.dao.OrderPO$HibernateProxy$RMSLTKwN["hibernateLazyInitializer"])

解决方法

spring.jackson.serialization.fail-on-empty-beans=false

或者

自动装载Bean

@Configuration
public class SerializerJacksonBean {

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

当然，也可以顺带设置下Jackson的时间转换格式：

@Configuration
public class SerializerJacksonBean {

    @Bean
    public ObjectMapper objectMapper() {
    	
    	ObjectMapper objectMapper = new ObjectMapper();
    	//取消时间的转化格式
    	objectMapper.configure(SerializationFeature.
                                    WRITE_DATES_AS_TIMESTAMPS, false);
    	objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd"));
    	objectMapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
    	
        return objectMapper;
    }
}

JPA集成Hibernate

SpringBoot controller默认使用的是Jackson数据，需要进行序列化。