java - 来自 JSON 文件的 Java 中的键值对

Question

我有一个 JSON 数据

{
"HiServiceInquiryResponse": {
    "CoverageInfoResponse": {
        "Participant": {
            "ns1:PersonalInfo": {
                "ns1:LastName": "AA",
                "ns1:Address": [
                    {
                        "ns1:Province": "",
                        "ns1:State": "CA",
                        "ns1:City": "LOS ANGELES",
                        "ns1:Country": "US",
                        "ns1:Address2": "",
                        "ns1:Address1": "test",
                        "ns1:PostalCode": 12345
                    },
                    {
                        "ns1:Province": "",
                        "ns1:State": "CA",
                        "ns1:City": "LOS ANGELES",
                        "ns1:Country": "US",
                        "ns1:Address2": "",
                        "ns1:Address1": "test",
                        "ns1:PostalCode": 12345
                    }
                ],
                "ns1:FirstName": "BB"
            },
            "ns1:Coverage": "",
            "ns1:HiClientId": 57,
            "ns1:Employment": {
                "ns1:EmployeeId": 1234,
                "ns1:TaxId": 111
            }
        }
    }
}

}

我想读取所有键值对并存储它们。到目前为止我能做到

    public static void printJsonObject(JSONObject jsonObj) {

    for (Object key : jsonObj.keySet()) {
        String keyStr = (String) key;
        Object keyvalue = jsonObj.get(keyStr);

        if (!(keyvalue instanceof JSONObject)) {
            System.out.println(keyStr + ", " + keyvalue);
        }
        if (keyvalue instanceof JSONObject) {
            printJsonObject((JSONObject) keyvalue);
        }
    }
}

问题是当我们的个人信息中有 2 个地址时，它不会单独读取它们。

当只有 1 个地址时我的输出:->

    ns1:LastName, AA
    ns1:Province, 
    ns1:State, CA
    ns1:City, LOS ANGELES
    ns1:Country, US
    ns1:Address2, 
    ns1:Address1, test
    ns1:PostalCode, 12345
    ns1:FirstName, BB
    ns1:Coverage, 
    ns1:HiClientId, 57
    ns1:EmployeeId, 1234
    ns1:TaxId, 111

当有 2 个地址时我的输出:->

    ns1:LastName, AA
    ns1:Address, [{"ns1:Province":"","ns1:State":"CA","ns1:City":"LOS ANGELES","ns1:Country":"US","ns1:Address2":"","ns1:Address1":"test","ns1:PostalCode":12345},{"ns1:Province":"","ns1:State":"CA","ns1:City":"LOS ANGELES","ns1:Country":"US","ns1:Address2":"","ns1:Address1":"test","ns1:PostalCode":12345}]
    ns1:FirstName, BB
    ns1:Coverage, 
    ns1:HiClientId, 57
    ns1:EmployeeId, 1234
    ns1:TaxId, 111

我希望显示两个地址的数据。

Answer 1

要解析 JSONObject 内的数组，您必须检查 JSONArray 的值实例，并为每个数组项递归调用 printJsonObject:

public static void printJsonObject(JSONObject jsonObj) {
    for (Object key : jsonObj.keySet()) {
        Object value = jsonObj.get(key);

        if (value instanceof JSONObject)
            printJsonObject((JSONObject)value);
        else if (value instanceof JSONArray)
            ((JSONArray)value).forEach(obj -> printJsonObject((JSONObject)obj));
        else
            System.out.println(key + ", " + value);
    }
}