如何讀取java中的JSON文件作為下面給定JSON的鍵值對？

Question

{
    "XML": {
        "version": 1.0,
        "encoding": "UTF-8"
    },
    "Comment": "ABC EFG Json",
    "pCt": {
        "pCHead": {
            "Date": "9999-12-31",
            "ID ": "12345 ",
            "Type": "ABC",
            "prtList": [{
                "cCType": "B",
                "cReason": "",
                "oInd": 10,
            }],
            "pNet": [{
                "seType": "3",
                "eDate": "2016-10-01",
                "exDate": "9999-12-31",


            }]
        }
    }
}

public static void main(String[] args) {

    JSONParser parser = new JSONParser();
    System.out.println("hii");
    try {
        Object obj = parser.parse(new FileReader("D:\\TestJson.txt"));

        JSONObject jsonObject = (JSONObject) obj;
        Object pCt =  jsonObject.get("pCt");
        String author = (String) jsonObject.get("pCHead");
        JSONArray companyList = (JSONArray) jsonObject.get("prtList");

        System.out.println("Name: " + pCt);
        System.out.println("\nCompany List:"+author);
        System.out.println("\nCompany List:");
        Iterator<String> iterator = companyList.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 1

根據我不會閱讀的JSON，您的解析或多或少是正確的。 唯一的錯誤是companyList是JSONArray並且它的元素是Object類型。 您需要從外部將其轉換為JSONObject，然后從中獲取模型。

//lombok
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Company {
    String cCType;
    String cReason;
    String oInd;
}

//in your main
for(Object o : companyList) {
    JSONObject companyJson = (JSONObject) o;
    Company company = Company.Builder
       .anCompany()
       .withCCType(companyJson.get("cCType"))
       .withCReason(companyJson.get("cReaeson"))
       .withOInd(companyJson.get("oInd"))
       .build();
//do whatever you like with data
}