Http狀态碼406(Not Acceptable)

HTTP 406 錯誤指無法接受 (Not acceptable)錯誤。

如果Web伺服器檢測到其想要回報的資料不能被用戶端接受，其将回報帶有406錯誤代碼的标頭。 用戶端可以向Web伺服器訓示其将接受伺服器回報資料的特征，這是通過使用以下類型的“接受标頭”完成的：

接受：用戶端接受的MIME（多功能Internet郵件擴充服務）類型。 例如，浏覽器可能隻接受知道如何處理的回報資料類型（HTML檔案，GIF檔案等）。

1、原始的代碼：

public static String requestPost(String url, JSONObject params) {
    //CloseableHttpClient httpClient = HttpClients.createDefault();
    String responseResult = "";
    try {
        HttpClient httpClient = HttpsClient.getInstance();
        // 1 建立一個post對象
        HttpPost post = new HttpPost(url);
        post.addHeader("Content-type", "application/json; charset=utf-8");
        post.setHeader("Accept", "application/json");
        // 2 建立一個Entity。模拟一個xml
        log.info("HttpsClient.requestPost.params-->>" + params);
        StringEntity stringEntity = new StringEntity(params.toJSONString(), "UTF-8");
        stringEntity.setContentEncoding("UTF-8");
        post.setEntity(stringEntity);
        // 3 執行post請求
        HttpResponse response = httpClient.execute(post);
        //CloseableHttpResponse response = httpClient.execute(post);
        HttpEntity he = response.getEntity();
        responseResult = EntityUtils.toString(he, "UTF-8");
        log.info("HttpsClient.requestPost.responseResult-->>" + responseResult);
        //response.close();
        //httpClient.close();
    } catch (Exception e) {
        e.printStackTrace();
        log.info("HttpsClient.requestPost.Exception-->>" + e.getMessage());
    }
    return responseResult;
}
           

2、注解掉報錯的代碼

public static String requestPost(String url, JSONObject params) {
    //CloseableHttpClient httpClient = HttpClients.createDefault();
    String responseResult = "";
    try {
        HttpClient httpClient = HttpsClient.getInstance();
        // 1 建立一個post對象
        HttpPost post = new HttpPost(url);
        post.addHeader("Content-type", "application/json; charset=utf-8");
        //post.setHeader("Accept", "application/json");
        // 2 建立一個Entity。模拟一個xml
        log.info("HttpsClient.requestPost.params-->>" + params);
        StringEntity stringEntity = new StringEntity(params.toJSONString(), "UTF-8");
        stringEntity.setContentEncoding("UTF-8");
        post.setEntity(stringEntity);
        // 3 執行post請求
        HttpResponse response = httpClient.execute(post);
        //CloseableHttpResponse response = httpClient.execute(post);
        HttpEntity he = response.getEntity();
        responseResult = EntityUtils.toString(he, "UTF-8");
        log.info("HttpsClient.requestPost.responseResult-->>" + responseResult);
        //response.close();
        //httpClient.close();
    } catch (Exception e) {
        e.printStackTrace();
        log.info("HttpsClient.requestPost.Exception-->>" + e.getMessage());
    }
    return responseResult;
}
           

3、解決方案

注解掉：//post.setHeader("Accept", "application/json")