[Java] SpringCloud Ribbon 负载均衡的实现

<!-- ribbon -->
   <dependency>
   <groupid>org.springframework.cloud</groupid>
   <artifactid>spring-cloud-starter-netflix-ribbon</artifactid>
   </dependency>

@enableeurekaclient
@ribbonclient(name = "ribbonconfig", configuration = ribbonconfig.class)
@springbootapplication
public class springbootspringdatajpaapplication{
 
  public static void main(string[] args) {
  springapplication.run(springbootspringdatajpaapplication.class, args);
  }
}
 
@configuration
class ribbonconfig {
 
  @bean
  public irule ribbonrule(){
  return new randomrule(); //分配策略：随机选择一个server
//  return new bestavailablerule(); //分配策略：选择一个最小的并发请求的server，逐个考察server，如果server被tripped了，则忽略
//  return new roundrobinrule(); //分配策略：轮询选择，轮询index，选择index对应位置的server
//  return new weightedresponsetimerule(); //分配策略：根据响应时间分配一个weight(权重)，响应时间越长，weight越小，被选中的可能性越低
//  return new zoneavoidancerule(); //分配策略：复合判断server所在区域的性能和server的可用性选择server
//  return new retryrule(); //分配策略：对选定的负载均衡策略机上重试机制，在一个配置时间段内当选择server不成功，则一直尝试使用subrule的方式选择一个可用的server
  }
 
  @bean
  public iping ribbonping() {
  return new pingurl();
  }
 
  @bean
  public serverlistsubsetfilter serverlistfilter() {
  serverlistsubsetfilter filter = new serverlistsubsetfilter();
  return filter;
  }
 
}

@restcontroller
@requestmapping("/user")
public class usercontroller {
 
  @requestmapping("/ribbon")
  public string ribbon() {
  return "springdatejpa -- 我的端口是：10088";
  }
 
}

@feignclient(name = "springdatejpa", path = "/user/")
public interface myspringbootfeign {
 
  @requestmapping("/ribbon")
  string ribbon();
}

/**
   * feign调用
   */
  @getmapping("feign/ribbon")
  string ribbon(){
  return myspringbootfeign.ribbon();
  }