应用程序启动 (startup)

startup 端点提供有关应用程序启动序列的信息。

获取应用程序启动步骤

应用程序启动步骤可以通过快照方式获取（GET）或从缓冲区中排出（POST）。

获取应用程序启动步骤的快照

要获取应用程序启动阶段到目前为止记录的步骤，向 /actuator/startup 发送 GET 请求，如下面的基于 curl 的示例所示：

$ curl 'http://localhost:8080/actuator/startup' -i -X GET

响应结果类似于以下内容：

HTTP/1.1 200 OK
Content-Type: application/vnd.spring-boot.actuator.v3+json
Content-Length: 868

{
  "springBootVersion" : "3.4.6",
  "timeline" : {
    "startTime" : "2025-05-25T10:03:22.552436Z",
    "events" : [ {
      "endTime" : "2025-05-25T10:03:22.975461Z",
      "duration" : "PT0.000002S",
      "startupStep" : {
        "name" : "spring.beans.instantiate",
        "id" : 3,
        "tags" : [ {
          "key" : "beanName",
          "value" : "homeController"
        } ],
        "parentId" : 2
      },
      "startTime" : "2025-05-25T10:03:22.975459Z"
    }, {
      "endTime" : "2025-05-25T10:03:22.975464Z",
      "duration" : "PT0.000011S",
      "startupStep" : {
        "name" : "spring.boot.application.starting",
        "id" : 2,
        "tags" : [ {
          "key" : "mainApplicationClass",
          "value" : "com.example.startup.StartupApplication"
        } ]
      },
      "startTime" : "2025-05-25T10:03:22.975453Z"
    } ]
  }
}

排出应用程序启动步骤

要排出并返回应用程序启动阶段到目前为止记录的步骤，向 /actuator/startup 发送 POST 请求，如下面的基于 curl 的示例所示：

$ curl 'http://localhost:8080/actuator/startup' -i -X POST

响应结果类似于以下内容：

HTTP/1.1 200 OK
Content-Type: application/vnd.spring-boot.actuator.v3+json
Content-Length: 867

{
  "springBootVersion" : "3.4.6",
  "timeline" : {
    "startTime" : "2025-05-25T10:03:22.552436Z",
    "events" : [ {
      "endTime" : "2025-05-25T10:03:22.887234Z",
      "duration" : "PT0.000362S",
      "startupStep" : {
        "name" : "spring.beans.instantiate",
        "id" : 1,
        "tags" : [ {
          "key" : "beanName",
          "value" : "homeController"
        } ],
        "parentId" : 0
      },
      "startTime" : "2025-05-25T10:03:22.886872Z"
    }, {
      "endTime" : "2025-05-25T10:03:22.887262Z",
      "duration" : "PT0.00193S",
      "startupStep" : {
        "name" : "spring.boot.application.starting",
        "id" : 0,
        "tags" : [ {
          "key" : "mainApplicationClass",
          "value" : "com.example.startup.StartupApplication"
        } ]
      },
      "startTime" : "2025-05-25T10:03:22.885332Z"
    } ]
  }
}

响应结构

响应包含应用程序启动步骤的详细信息。 下表描述了响应的结构：

Path Type Description

springBootVersion

String

Spring Boot version for this application.

timeline.startTime

String

Start time of the application.

timeline.events

Array

An array of steps collected during application startup so far.

timeline.events.[].startTime

String

The timestamp of the start of this event.

timeline.events.[].endTime

String

The timestamp of the end of this event.

timeline.events.[].duration

String

The precise duration of this event.

timeline.events.[].startupStep.name

String

The name of the StartupStep.

timeline.events.[].startupStep.id

Number

The id of this StartupStep.

timeline.events.[].startupStep.parentId

Number

The parent id for this StartupStep.

timeline.events.[].startupStep.tags

Array

An array of key/value pairs with additional step info.

timeline.events.[].startupStep.tags[].key

String

The key of the StartupStep Tag.

timeline.events.[].startupStep.tags[].value

String

The value of the StartupStep Tag.