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SOP/doc/docs/files/10087_自定义返回结果.md
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# 自定义返回结果
网关默认对业务结果进行合并,然后返回统一的格式。
针对`alipay.story.find`接口,微服务端返回结果如下:
```json
{
"name": "白雪公主",
"id": 1,
"gmtCreate": 1554193987378
}
```
网关合并后,最终结果如下
```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 MyConfig {
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`OpenConfig.dataNameBuilder = new CustomDataNameBuilder();`
## 自定义结果处理
如果想要对微服务结果做更深一步处理,步骤如下:
1. 新增一个类,继承`GatewayResultExecutor.java`,并重写`String mergeResult(T request, String serviceResult)`方法
2. 配置自定义类
```java
@Configuration
public class MyConfig {
static {
...
ApiConfig.getInstance().setGatewayResultExecutor(new MyGatewayResultExecutor());
...
}
}
```
## 不合并结果
如果不希望对结果进行合并可在application.properties中设置`sop.api-config.merge-result=false`
这样,网关最终返回结果即为微服务端的返回结果。