我们如何在Spring docs Open API的执行器端点(如/health )中添加默认响应代码？

在Spring docs Open API的执行器端点中添加默认响应代码可以通过以下步骤实现：

创建一个自定义的HealthEndpoint类，继承自Spring Boot的HealthEndpoint类，并重写getHealth方法。

import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.boot.actuate.health.Status;
import org.springframework.boot.actuate.health.StatusAggregator;
import org.springframework.boot.actuate.health.StatusContributor;
import org.springframework.boot.actuate.health.StatusEndpoint;
import org.springframework.boot.actuate.health.StatusEndpointWebExtension;
import org.springframework.stereotype.Component;

@Component
public class CustomHealthEndpoint extends HealthEndpoint {

    public CustomHealthEndpoint(HealthIndicator healthIndicator, StatusAggregator statusAggregator) {
        super(healthIndicator, statusAggregator);
    }

    @Override
    public Health getHealth(boolean includeDetails) {
        Health health = super.getHealth(includeDetails);
        Status status = health.getStatus();
        if (status.equals(Status.UNKNOWN)) {
            // 添加默认响应代码
            health = Health.status(Status.UP).build();
        }
        return health;
    }
}

在Spring Boot的配置类中，将自定义的CustomHealthEndpoint类注入为一个Bean。

import org.springframework.boot.actuate.health.StatusAggregator;
import org.springframework.boot.actuate.health.StatusEndpoint;
import org.springframework.boot.actuate.health.StatusEndpointWebExtension;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfig {

    @Bean
    public CustomHealthEndpoint customHealthEndpoint(HealthIndicator healthIndicator, StatusAggregator statusAggregator) {
        return new CustomHealthEndpoint(healthIndicator, statusAggregator);
    }
}

在application.properties或application.yml配置文件中，启用执行器端点。

management.endpoints.web.exposure.include=health

现在，当访问执行器端点/health时，如果原始响应的状态为UNKNOWN，将会返回一个默认的健康状态为UP的响应。

注意：以上代码示例中，CustomHealthEndpoint类继承自HealthEndpoint类，这是Spring Boot 2.x版本的实现方式。如果你使用的是Spring Boot 1.x版本，可以继承自AbstractHealthIndicator类，并实现doHealthCheck方法来达到相同的效果。