我如何在jmeter中使用正则表达式获取值

Question

我需要在jmeter中进行关联以进行性能测试，但无法获取所需的值。

    {
  "totalCount": 8,
  "data": [
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821844,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T10:45:14",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821842,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T10:30:45",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821848,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T11:11:21",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821843,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T10:39:03",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821846,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T10:54:55",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821849,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T12:35:45",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821845,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T10:50:57",
      283
    ],
    [
      "TEST_CLASS",
      "2020-05-18",
      "2020-05-18",
      9821847,
      "FY21 - WK 16",
      "FY21 - WK 16",
      null,
      "USER",
      "Name",
      "2020-05-11T11:05:58",
      283
    ]
  ],
  "additionalInfo": {
    "startDates": [
      "FY21 - WK 16"
    ],
    "createdByUsers": {
      "283": "USER Name"
    },
    "endDates": [
      "FY21 - WK 16"
    ]
  }
}

并且每次创建记录时，此json值都会不断增加，需要获取使用正则表达式的最后一个9821847值，但它无济于事实际上，json中的所有信息都是相关的，例如"2020-05-18"，"TEST_CLASS"，"FY21 - WK 16"，"USER"，"Name"唯一不相关的是UTC时间戳"2020-05-11T10:30:45",甚至这个都是使用JSR223后处理器生成的，以便在创建记录时在正则表达式中使用它。

实际正则表达式看起来像：TEST_CLASS","${c3}","${c3}",(.*?),"${FY_WK}","${FY_WK}",null,"USER","Name","${utc_time}:

如果我删除相关值，则看起来像TEST_CLASS","2020-05-18","2020-05-18",(.*?),"FY21 - WK 16","FY21 - WK 16",null,"USER","Name","2020-05-11T11:05:

Answer 1

您可以使用JSON Extractor通过以下配置获取所有值

• 变量名称：MyVar
• JSON路径表达式：$.data.[*].[3]
• 比赛编号：-1
• 默认值：NOT_FOUND

然后您可以使用${__V(MyVar_${MyVar_matchNr})}获取最后一个值。