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SOP/doc/docs/files/10099_更改数据节点名称.md

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# 更改数据节点名称
针对`alipay.story.find`接口,它的返回结果如下:
```json
{
"alipay_story_find_response": {
"msg": "Success",
"code": "10000",
"name": "白雪公主",
"id": 1,
"gmtCreate": 1554193987378
},
"sign": "xxxxx"
}
```
其中`alipay_story_find_response`是它的数据节点。规则是:
> 将接口名中的点`.`转换成下划线`_`,后面加上`_response`
代码实现如下:
```java
String method = "alipay.story.find";
return method.replace('.', '_') + "_response";
```
详见`DefaultDataNameBuilder.java`
如果要更改数据节点,比如`result`,可使用`CustomDataNameBuilder.java`。
```java
@Configuration
public class ZuulConfig extends AlipayZuulConfiguration {
static {
...
ApiConfig.getInstance().setDataNameBuilder(new CustomDataNameBuilder());
...
}
}
```
设置后,网关统一的返回结果如下:
```json
{
"result": {
...
},
"sign": "xxxxx"
}
```
此外,构造方法可指定自定义字段名称:`new CustomDataNameBuilder("data");`。
设置后,数据节点将变成`data`
```json
{
"data": {
...
},
"sign": "xxxxx"
}
```
**注**:网关设置了CustomDataNameBuilder后,SDK也要做相应的更改:`SdkConfig.dataNameBuilder = new CustomDataNameBuilder();`