mybatis 嵌套查询异常

mybatis 嵌套查询，所报异常加上　@JsonIgnoreProperties(value = { "hibernateLazyInitializer", "handler" })注解

@Getter
@Setter
@NoArgsConstructor
@JsonIgnoreProperties(value = { "hibernateLazyInitializer", "handler" })
public class PlatRoleVO {

    private String platId;
    private String title;
    private boolean expand;

    private List roles;

    @Getter
    @Setter
    @NoArgsConstructor
    private static class Role {
        private String roleId;
        private String title;
    }

    public boolean isExpand() {
        return expand;
    }

    public void setExpand(boolean expand) {
        if (this.roles != null && this.roles.size() > 0) {
            this.expand = true;
        }
    }
}

Could not write JSON: No serializer found for class org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.linlong.back.core.model.ResponseModel["content"]->java.util.ArrayList[0]->com.linlong.back.auth.plat.mapper.custom.entity.PlatRoleVO_$$_jvst87c_0["handler"])