@JsonInclude(JsonInclude.Include.NON_NULL) 

集成于Springboot2.0中

此方法的配置意在实体类与json互转的时候 属性值为null的不参与序列

化。

使用时：用注解的方式放在标记类或者属性

或者在配置文件中添加全局配置

jackson.default-property-inclusion:non_null

*不过这配置要慎用，不然你项目中所有的实体类转为JSON需要显示时，值为null的都不会显示。

使用前效果：{"platform_order_id":"20191025112603731","order_id":"12345","merchant_id":"1","sign":"3b8944f68fd2a3ef54dc349cba207e457435bd653375d10043adec832d9db14c","sign_type":"SHA256","total_amount":"1","remark1":null,"remark2":null,"qrUrl":"https://qr.chinaums.com/bills/qrCode.do?id=30471910253040324116767159","code":"SUCCESS","errorMassage":null}

使用后效果：{"platform_order_id":"20191025104352324","order_id":"12345","merchant_id":"1","sign":"388db8c52c86b4843f676340fb12c10ee1ca2674eeb4057dd0cb58d00adc0e17","sign_type":"SHA256","total_amount":"1","qrUrl":"https://qr.chinaums.com/bills/qrCode.do?id=30471910256385241102482750","code":"SUCCESS"}