java - 如何在Java中提取最后一个jsonPath值？

Question

您好，我想问如何检索 jsonPath 中的最后一个值

{
    "testing": [
        {
            "transactionId": "5a99dcf84b7f633a5489805d",
            "trackingId": "555112",
            "tn": "6095555112",
            "customerName": "John",
            "customerLastName": "Chan"
        },
        {
            "transactionId": "5a99dd3f4b7f633a54898068",
            "tn": "6095555112",
            "trackingId": "555112",
            "customerName": "Amanda",
            "customerLastName": "Brown"

        }
    ]
}

我的 Java 代码示例行

System.out.println("response.prettyPrint() = " + response.jsonPath().getString("testing.transactionId"));

输出

response.prettyPrint() = 5a99dcf84b7f633a5489805d,5a99dcf84b7f633a5489805d

现在它正在打印所有 transactionId。它应该只拉出最新的一个，即最下面的一个，其中 transactionId = "5a99dd3f4b7f633a54898068"

如果有新值进来(通过后端逻辑，将向其中添加另一组值)。如何编写一行来提取最新的值集？

示例

{
    "testing": [
        {
            "transactionId": "5a99dcf84b7f633a5489805d",
            "trackingId": "555112",
            "tn": "6095555112",
            "customerName": "John",
            "customerLastName": "Chan"
        },
        {
            "transactionId": "5a99dd3f4b7f633a54898068",
            "tn": "6095555112",
            "trackingId": "555112",
            "customerName": "Amanda",
            "customerLastName": "Brown"

        },
        {
            "transactionId": "newID",
            "tn": "6095555112",
            "trackingId": "555112",
            "customerName": "Amanda",
            "customerLastName": "Brown"

        },
    ]
}

既然已经存储了一个新的数据集，我将如何编写一个java代码来提取transactionId“NewID”？

我不想硬编码并编写类似“.transactionId[0]”[1]或[2]的内容

Answer 1

好吧，您可以使用 getList 而不是使用 getString 例如

List<String> strList = response.jsonPath().getList("testing.transactionId");

System.out.println("last value is " + strList.get(strList.size()-1))