  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <version>${spring-boot.version}</version>
 </dependency>

配置文件中配置：

management.endpoints.web.base-path=/actuator
management.endpoints.web.exposure.include=logfile,loggers 
management.endpoint.health.show-details=always
logging.file.name=logs/EL-3KJ/EL-3KJ.log

然后直接可以訪問 http://localhost:8085/actuator

得到下列結果：

{"_links":{
"self"{"href":"http://localhost:8085/actuator","templated":false},
"logfile： {"href":"http://localhost:8085/actuator/logfile","templated":false},"loggers":{"href":"http://localhost:8085/actuator/loggers","templated":false},"loggers-name":{"href":"http://localhost:8085/actuator/loggers/{name}","templated":true}}}

其中

logfile 是查看日志文件
loggers是查看日志級別
loggers/{name}是更改日志級別

前端參考代碼：

 <TabPane label="接口日志" name="name3">
                級別：
                <RadioGroup v-model="loglevel" type="button" size="small" @on- 
                      change="lvChange()">
                  <Radio label="ERROR"></Radio>
                  <Radio label="INFO"></Radio>
                  <Radio label="DEBUG"></Radio>
                </RadioGroup> <br/><br/>
                文件：<a :href="logfileurl" rel="external nofollow"  target="_blank"  > 查看</a>
 </TabPane>
 
 
 
 this.logfileurl = res.dataApi+"actuator/logfile";
 this.loglevelurl = res.dataApi+"actuator/loggers/root";
 
 
getLogLevel(){
      this.ajax_get({
        url: this.loglevelurl,
        params: {},
      }).then((res) => {
        this.loglevel=res.configuredLevel
      });
},
lvChange(){
      this.changeLogLevel(this.loglevel)
},
changeLogLevel(level){
      this.ajax_post({
        url: this.tenant.dataApi + "actuator/loggers/root",
        params: {'configuredLevel':level},
      }).then((res) => {
        this.spinShow = false;
        if (!res.code) {
          this.$Notice.success({
            title:'更改日志級別為'+level,
            desc:res.msg
          });
        } else {
          this.$Notice.error({
            title:'更改日志級別失敗',
            desc:res.msg
          });
        }
      });
 }

最終效果如下：