beego controller响应json时如何忽略空值

beego controller响应json时如何忽略空值：如 ``` { "Id": 0, "Account": "admin", "Password": "", "RoleId": 0, "Status": "", "CreateTime": "0001-01-01T00:00:00Z", "CreateUserId": 0, "UpdateTime": "0001-01-01T00:00:00Z", "UpdateUserId": 0 } ``` 零值数据不返回 只返回 `{“Account”:"admin"}` 代码： ``` func (this *AdminManageController) GetCurrentSysAdmin() { var uid = this.GetSession("uid") this.Ctx.Output.JSON(entity.SysAdmin{Account:uid.(string)}, true, false) } ```