PropertySourceBootstrapProperties remoteProperties = new PropertySourceBootstrapProperties();
Binder.get(environment(incoming)).bind("spring.cloud.config",
       Bindable.ofInstance(remoteProperties));
      // 跟进3个参数的组合，决定远程参数加入environment的开头还是结尾
if (!remoteProperties.isAllowOverride() || (!remoteProperties.isOverrideNone()
       && remoteProperties.isOverrideSystemProperties())) {
    for (PropertySource<?> p : reversedComposite) {
       propertySources.addFirst(p);
    }
    return;
}
if (remoteProperties.isOverrideNone()) {
    for (PropertySource<?> p : composite) {
       propertySources.addLast(p);
    }
    return;
}
if (propertySources.contains(SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME)) {
    if (!remoteProperties.isOverrideSystemProperties()) {
       for (PropertySource<?> p : reversedComposite) {
          propertySources.addAfter(SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME, p);
       }
    }
    else {
       for (PropertySource<?> p : composite) {
          propertySources.addBefore(SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME, p);
       }
    }
}
else {
    for (PropertySource<?> p : composite) {
       propertySources.addLast(p);
    }
}

@ConfigurationProperties("spring.cloud.config")
public class PropertySourceBootstrapProperties {

    /**
     * Flag to indicate that the external properties should override system properties.
     * Default true.
     */
    private boolean overrideSystemProperties = true;

    /**
     * Flag to indicate that {@link #isOverrideSystemProperties()
     * systemPropertiesOverride} can be used. Set to false to prevent users from changing
     * the default accidentally. Default true.
     */
    private boolean allowOverride = true;

    /**
     * Flag to indicate that when {@link #setAllowOverride(boolean) allowOverride} is
     * true, external properties should take lowest priority and should not override any
     * existing property sources (including local config files). Default false.
     */
    private boolean overrideNone = false;
}

protected <T> T getProperty(String key, Class<T> targetValueType, boolean resolveNestedPlaceholders) {
    if (this.propertySources != null) {
       for (PropertySource<?> propertySource : this.propertySources) {
          if (logger.isTraceEnabled()) {
             logger.trace("Searching for key '" + key + "' in PropertySource '" +
                   propertySource.getName() + "'");
          }
          Object value = propertySource.getProperty(key);
          if (value != null) {
             if (resolveNestedPlaceholders && value instanceof String) {
                value = resolveNestedPlaceholders((String) value);
             }
             logKeyFound(key, propertySource, value);
             return convertValueIfNecessary(value, targetValueType);
          }
       }
    }
    if (logger.isTraceEnabled()) {
       logger.trace("Could not find key '" + key + "' in any property source");
    }
    return null;
}

package com.alibaba.cloud.examples.loadbalancer;

import com.alibaba.cloud.commons.lang.StringUtils;
import java.util.List;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.DefaultResponse;
import org.springframework.cloud.client.loadbalancer.EmptyResponse;
import org.springframework.cloud.client.loadbalancer.Request;
import org.springframework.cloud.client.loadbalancer.RequestDataContext;
import org.springframework.cloud.client.loadbalancer.Response;
import org.springframework.cloud.loadbalancer.core.NoopServiceInstanceListSupplier;
import org.springframework.cloud.loadbalancer.core.ReactorServiceInstanceLoadBalancer;
import org.springframework.cloud.loadbalancer.core.SelectedInstanceCallback;
import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
import reactor.core.publisher.Mono;

/**
 * @Title : MyLoadBalancer
 * @Description: :
 * @author: libo@juzishuke.com
 * @date: 2023/9/11 16:51
 * @Version:1.0
 */
//@Component
public class MyLoadBalancer implements ReactorServiceInstanceLoadBalancer {

    private static final Log log = LogFactory.getLog(MyLoadBalancer.class);

    final AtomicInteger position;
    final String        serviceId;
    ObjectProvider<ServiceInstanceListSupplier> serviceInstanceListSupplierProvider;

    public MyLoadBalancer(
            ObjectProvider<ServiceInstanceListSupplier> serviceInstanceListSupplierProvider,
            String name) {
        this(serviceInstanceListSupplierProvider, name, new Random().nextInt(1000));
    }

    public MyLoadBalancer(
            ObjectProvider<ServiceInstanceListSupplier> serviceInstanceListSupplierProvider,
            String name, int seedPosition) {
        this.serviceId = name;
        this.serviceInstanceListSupplierProvider = serviceInstanceListSupplierProvider;
        this.position = new AtomicInteger(seedPosition);
    }

    @Override
    public Mono<Response<ServiceInstance>> choose(Request request) {
        ServiceInstanceListSupplier supplier = serviceInstanceListSupplierProvider.getIfAvailable(
                NoopServiceInstanceListSupplier::new);
        return supplier.get(request).next()
                .map(serviceInstances -> processInstanceResponse(request, supplier,
                        serviceInstances));
    }

    private Response<ServiceInstance> processInstanceResponse(Request request,
            ServiceInstanceListSupplier supplier, List<ServiceInstance> serviceInstances) {
        String zone = ((RequestDataContext) request.getContext()).getClientRequest().getCookies()
                .getFirst("zone");
        if (StringUtils.isNotBlank(zone)) {
            serviceInstances = serviceInstances.stream()
                    .filter(e -> zone.equalsIgnoreCase(e.getMetadata().get("version"))).collect(Collectors.toList());
        }
        Response<ServiceInstance> serviceInstanceResponse = getInstanceResponse(request,
                serviceInstances);
        if (supplier instanceof SelectedInstanceCallback && serviceInstanceResponse.hasServer()) {
            ((SelectedInstanceCallback) supplier).selectedServiceInstance(
                    serviceInstanceResponse.getServer());
        }
        return serviceInstanceResponse;
    }

    private Response<ServiceInstance> getInstanceResponse(Request request,
            List<ServiceInstance> instances) {
        if (instances.isEmpty()) {
            if (log.isWarnEnabled()) {
                log.warn("No servers available for service: " + serviceId);
            }
            return new EmptyResponse();
        }

        // Do not move position when there is only 1 instance, especially some suppliers
        // have already filtered instances
        if (instances.size() == 1) {
            return new DefaultResponse(instances.get(0));
        }

        // Ignore the sign bit, this allows pos to loop sequentially from 0 to
        // Integer.MAX_VALUE
        int pos = this.position.incrementAndGet() & Integer.MAX_VALUE;

        ServiceInstance instance = instances.get(pos % instances.size());

        return new DefaultResponse(instance);
    }
}

package com.alibaba.cloud.examples.config;

import com.alibaba.cloud.examples.loadbalancer.MyLoadBalancer;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.loadbalancer.core.ReactorLoadBalancer;
import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;

/**
 * @Title : LoadBalancerConfiguration
 * @Description: :
 * @author: libo@juzishuke.com
 * @date: 2023/9/11 17:16
 * @Version:1.0
 */
@Configuration(proxyBeanMethods = false)
public class LoadBalancerConfiguration {


    @Bean
    public ReactorLoadBalancer<ServiceInstance> reactorServiceInstanceLoadBalancer(
            Environment environment, LoadBalancerClientFactory loadBalancerClientFactory) {
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);
        return new MyLoadBalancer(
                loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class),
                name);
    }
}

 Set<Integer> sets = new TreeSet<>(new Comparator<Integer>() {
    @Override
    public int compare(Integer o1, Integer o2) {
        return o2 == o1 ? 0 : o2 > o1 ? 1 : -1;
    }
});
sets.add(1);
sets.add(-1);
sets.add(100);
System.out.println(Arrays.toString(sets.toArray(new Integer[]{})));
//[100, 1, -1]

Set<Integer> sets = new TreeSet<>(new Comparator<Integer>() {
    @Override
    public int compare(Integer o1, Integer o2) {
        return o2-o1;
    }
});
sets.add(1);
sets.add(-1);
sets.add(Integer.MIN_VALUE);
System.out.println(Arrays.toString(sets.toArray(new Integer[]{})));
[-2147483648, 1, -1]

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                //包路径
                .apis(RequestHandlerSelectors.basePackage("cn.infisa.swagger")) 
                .paths(PathSelectors.any())
                .build();
    }
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("测试系统") 
                .description("测试系统")
                .version("1.0")
                .build();
    }
}

//开放swagger
chains.put("/swagger-resources/**", "anon");
chains.put("/webjars/**", "anon");
chains.put("/v2/**", "anon");
chains.put("/swagger-ui.html/**", "anon");

@ApiImplicitParams({
        @ApiImplicitParam(name = "ctoken", required = true, value = "a", paramType = "header"),
})

Properties props = new Properties();
props.put("bootstrap.servers", "192.168.1.173:9092");
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
KafkaProducer producer = new KafkaProducer<String, String>(props);
ProducerRecord record = new ProducerRecord<String, String>(topic, null, null, JacksonUtils.nonDefaultMapper().toJson(student));