如何在Java中提取最后一个jsonPath值？

您好，我想问一下如何检索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"));

{
    "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"

        },
    ]
}

输出

response.prettyPrint() = 5a99dcf84b7f633a5489805d,5a99dcf84b7f633a5489805d

现在它正在打印所有TransactionID。它应该只拉取最新的一个，即transactionId=“5a99dd3f4b7f633a54898068”处的底部一个

如果一个新值进入（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

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

{
    "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”

我不想硬编码和编写类似“.transactionId[0]”[1]或[2]

使用Gson api的东西

它转换json-->java对象

---

我希望这会有所帮助。我不知道确切的代码，但我知道在数组中，你可以得到最后一项，如

 ARRAY.get(ARRAY.size()-1) 

---

我不知道如何在JSON数组中正确地实现这一点，但我希望这会给您带来正确的方向

不用

getString

你可以使用

getList

例如

List strList=response.jsonPath（）.getList（“testing.transactionId”）；
System.out.println（“最后一个值是”+strList.get（strList.size（）-1））

工作起来很有魅力！非常感谢你，阿萨尔。