如何將 JSON Object 轉換為 JSON 數組並將 map 轉換為自定義 POJO？

Question

我有這樣的回應

{
    "RCDSO - Production Environment Cost": {
        "href": "href1"
    },
    "RCDSO - Development & UAT Environment Cost": {
        "href": "href2"
    },
    "RCDSO - Total Cost for Prod - Compugen Managed": {
        "href": "href3"
    },
    "RCDSO - Virtual Machine Cost": {
        "href": "href4"
    },
    "RCDSO - Azure File Storage Cost": {
        "href": "href5"
    },
    "RCDSO - Azure Backup and Site Recovery": {
        "href": "href6"
    },
    "RCDSO - Azure App Services Cost": {
        "href": "href7"
    }
}

我想把JSON上面的map改成ReportResponse.java POJO class。

public class ReportResponse {
    private String name;
    private String href;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getHref() {
        return href;
    }
    public void setHref(String href) {
        this.href = href;
    }
}

這樣當我通過我的 Rest API 返回 JSON 時，響應應該如下所示：

    {
      "response":[
        {
            "name" : "RCDSO - Production Environment Cost",
            "href" : "href1"
        },
        {
            "name" : "RCDSO - Development & UAT Environment Cost",
            "href" : "href2"
        },
        {
            "name" : "RCDSO - Total Cost for Prod - Compugen Managed",
            "href" : "href3"
        }
        ..... so on....
    ]
}

我試圖從外部 API 獲得響應並從中提取 json object 然后嘗試將其轉換為 json 數組。

public String getReportList(String clientApiId) {
    String response = null;
    ResponseEntity<String> responseEntity = null;
    try {
        final String url = "https://chapi.cloudhealthtech.com/olap_reports/custom?client_api_id="+clientApiId;
        RestTemplate restTemplate = new RestTemplate();
        HttpHeaders header = new HttpHeaders();
        header.add(HttpHeaders.AUTHORIZATION, "Bearer "+apiKey);
        header.add(HttpHeaders.ACCEPT, "application/json");
        
        HttpEntity<String> requestEntity = new HttpEntity<String>("body",header);
        responseEntity = restTemplate.exchange(url, HttpMethod.GET, requestEntity, String.class);
        
        response = responseEntity.getBody();
        
        JSONObject obj = new JSONObject(response);
        JSONObject linkJsonObj = obj.getJSONObject("links");
        
        Iterator itr = linkJsonObj.keys();
        JSONArray array = new JSONArray();
        while(itr.hasNext()) {
            String key = (String)itr.next();
            array.put(linkJsonObj.get(key));
        }
        System.out.println("Json Array : "+array);
    } catch (Exception e) {
        System.out.println(e.getMessage());
        e.printStackTrace();
    }
    return response;
}

請幫助我實現預期的 JSON 和 map 到 ReportResponse.java POJO class。

Answer 1

您可以使用 ObjectMapper 檢查： https://json2csharp.com/code-converters/json-to-pojo到 map

如果您的 7 行將始終相同或只是創建 ReportResponse 與單條目列表 (pojo) 和 map 到 obj eg ReportEntry (name, href) 然后只返回此列表作為響應