如何计算JSON数组列表的长度

Question

我有Json响应：将响应提到为filter =

toString()

我需要计算jmeter中数组列表的长度。

    [
    {
        "dLine": [
            {
                "serviceItem": "SGR40400003",
                "delivery": "HD~1~1",
                "unitOfMeasure": "ORDERS"
            },
            {
                "serviceItem": "SGR40400001",
                "delivery": "HD~1~2",
                "unitOfMeasure": "ORDERS"
            }
        ]
    }
]

尝试了另一种情况：

JSONArray equipmentParts = new JSONArray(filter);
JSONArray parts = new JSONArray();size = equipmentParts.length();log.info(size);