pom配置

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

配置applitaion.yml

spring:
  application:
    name: school
  cloud:
    sentinel:
      transport:
        dashboard: 127.0.0.1:8000
      enabled: true
      eager: true
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        username: nacos
        password: nacos
      config:
        server-addr: 127.0.0.1:8848
        username: nacos
        password: nacos
        file-extension: yml

启动命令 cmd.bat

java -Dserver.port=8000 -Dcsp.sentinel.dashboard.server=127.0.0.1:8000 -jar sentinel-dashboard.jar

启动完的界面

application.yml中配置中的 dashboard:127.0.0.1:8000 

第一次用了localhost:8000,簇点链路为空不显示。

第二次用了ip:8000,簇点链路为空不显示。
第三次改成了 127.0.0.1:8000，开始显示。

需要再重新测试几遍，保障问题解决