使用jpa的实体对象转json符串时懒加载的问题及解决

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-hibernate5</artifactId>
    <version>2.9.4</version>
</dependency>

@Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
    Hibernate5Module module = new Hibernate5Module();
    module.disable(Hibernate5Module.Feature.USE_TRANSIENT_ANNOTATION);
    module.enable(Hibernate5Module.Feature.SERIALIZE_IDENTIFIER_FOR_LAZY_NOT_LOADED_OBJECTS);
    MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
    ObjectMapper mapper = converter.getObjectMapper();
    mapper.registerModule(module);
        return converter;
}

@OneToMany
@JoinColumn(name = "fk_uid")
@JsonIgnore
private Set<Comment> comments;

@Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
    MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
    ObjectMapper mapper = converter.getObjectMapper();
    mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY)
    return converter;
}

@OneToMany
@JoinColumn(name = "fk_uid")
@JsonIgnore
private Set<Comment> comments;