使用JSON文件中的remove方法而不是JSON数组删除JSON对象

Question

我试图使用org.json库从JSON文件中删除JSON数组

我正试图从JSON文件中删除webAutomation JSON数组，如下所示

{
    "instructor": "Test_Instructor",
    "url": "www.google.com",
    "services": "Test Automation Service",
    "expertise": "Testing",
    "linkedIn": "linkedIn",
    "courses": {
        "webAutomation": [
            {
                "price": "500",
                "courseTitle": "Selenium"
            },
            {
                "price": "333",
                "courseTitle": "Protractor"
            }
        ],
        "apiAutomation": [
            {
                "price": "344.00",
                "courseTitle": "Rest Assured API Automation"
            }
        ],
        "mobileAutomation": [
            {
                "price": "4555",
                "courseTitle": "Appium"
            }
        ]
    }
}

我试着遵循密码。这里str有JSON文件

JSONObject jsonObject = new JSONObject(str);
jsonObject.getJSONObject("courses").getJSONArray("webAutomation");
System.out.println("after removal");
String str2 = mapper.writeValueAsString(jsonObject);
System.out.println(str2);

这将删除整个JSON对象，而不仅仅是JSON。输出为{"empty":false} --请帮助

Answer 1

您可以在remove中使用org.json.JSONObject#remove方法。

JSONObject json = new JSONObject(str);
json.getJSONObject("courses").remove("webAutomation");
System.out.println(json);

产出如下：

{
    "instructor": "Test_Instructor",
    "url": "www.google.com",
    "services": "Test Automation Service",
    "expertise": "Testing",
    "linkedIn": "linkedIn",
    "courses": {
        "apiAutomation": [
            {
                "price": "344.00",
                "courseTitle": "Rest Assured API Automation"
            }
        ],
        "mobileAutomation": [
            {
                "price": "4555",
                "courseTitle": "Appium"
            }
        ]
    }
}