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# 获取

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### 描述

`integer/array history.get(object parameters)`

该方法允许根据给定的参数检索历史数据。

参考: [已知问题](//zh/manual/installation/known_issues#api)

<note
important>如果内置数据管理housekeeper尚未移除已删除实体的历史数据，则此方法可能会返回该数据。
:::

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### 参数

`(object)` 定义期望输出的参数。

该方法支持以下参数：

|参数                     [|型](/zh/manual/api/reference_commentary#data_types)   描述|<|
|----------------------------|-------------------------------------------------------------|-|
|history|整数                                                     要|回的历史对象类型。<br><br>可能的值：<br>0 - 数字浮点；<br>1 - 字符串；<br>2 - 日志；<br>3 - 无符号数字；<br>4 - 文本。<br><br>默认值: 3。|
|hostids|字符串/数组                                              只返回给|主机的历史记录。|
|itemids|字符串/数组                                              只返回给|监控项的历史记录。|
|time\_from|时间戳                                                   仅返|在给定时间时或之后收到的值。|
|time\_till|时间戳                                                   仅返|在给定时间时或之前收到的值。|
|sortfield|字符串/数组                                              按照给定|属性对结果进行排序。<br><br>可能的值: `itemid` 和 `clock`。|
|countOutput|布尔值                                                   这些|数对于所有get方法都是通用的，详细描述可参考： [注释参考](/zh/manual/api/reference_commentary#common_get_method_parameters)。|
|editable|布尔值                                                   ::|<|
|excludeSearch|布尔值                                                   ::|<|
|filter|对象                                                     :|:|
|limit|整数                                                     :|:|
|output|查询                                                     :|:|
|search|对象                                                     :|:|
|searchByAny|布尔值                                                   ::|<|
|searchWildcardsEnabled|布尔值                                                   ::|<|
|sortorder|字符串/数组                                              :::|<|
|startSearch|布尔值                                                   ::|<|

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### 返回值

`(integer/array)` 返回任一:

-   一组对象
-   如果使用了`countOutput`参数，返回检索对象的数量

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### 示例

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#### 获取监控项历史数据

从数字(浮点)监控项中获取最近10条数据

请求:

``` {.java}
{
    "jsonrpc": "2.0",
    "method": "history.get",
    "params": {
        "output": "extend",
        "history": 0,
        "itemids": "23296",
        "sortfield": "clock",
        "sortorder": "DESC",
        "limit": 10
    },
    "auth": "038e1d7b1735c6a5436ee9eae095879e",
    "id": 1
}
```

响应:

``` {.java}
{
    "jsonrpc": "2.0",
    "result": [
        {
            "itemid": "23296",
            "clock": "1351090996",
            "value": "0.0850",
            "ns": "563157632"
        },
        {
            "itemid": "23296",
            "clock": "1351090936",
            "value": "0.1600",
            "ns": "549216402"
        },
        {
            "itemid": "23296",
            "clock": "1351090876",
            "value": "0.1800",
            "ns": "537418114"
        },
        {
            "itemid": "23296",
            "clock": "1351090816",
            "value": "0.2100",
            "ns": "522659528"
        },
        {
            "itemid": "23296",
            "clock": "1351090756",
            "value": "0.2150",
            "ns": "507809457"
        },
        {
            "itemid": "23296",
            "clock": "1351090696",
            "value": "0.2550",
            "ns": "495509699"
        },
        {
            "itemid": "23296",
            "clock": "1351090636",
            "value": "0.3600",
            "ns": "477708209"
        },
        {
            "itemid": "23296",
            "clock": "1351090576",
            "value": "0.3750",
            "ns": "463251343"
        },
        {
            "itemid": "23296",
            "clock": "1351090516",
            "value": "0.3150",
            "ns": "447947017"
        },
        {
            "itemid": "23296",
            "clock": "1351090456",
            "value": "0.2750",
            "ns": "435307141"
        }
    ],
    "id": 1
}
```

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### 来源

CHistory::get() in *ui/include/classes/api/services/CHistory.php*.

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