HttpClient上傳json串時中文數據亂碼問題解決

在調用後臺接口時，發現傳過去的json串中的中文字符是亂碼，特此記錄下：

原來老的代碼

 public static String doPostJson(String url, Map<String, String> headers, String json) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            HttpPost httpPost = new HttpPost(url);
            if (headers != null) {
                for (String key : headers.keySet()) {
                    httpPost.addHeader(key, headers.get(key));
                }
            }
            httpPost.setHeader("HTTP Method", "POST");
            httpPost.setHeader("Connection", "Keep-Alive");
            httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");
            StringEntity entity = new StringEntity(json);
            entity.setContentType("application/json;charset=UTF-8");
            httpPost.setEntity(entity);
            response = httpClient.execute(httpPost);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            logger.error("doPost, error:", e.toString());
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                logger.error("doPost, error:", e.toString());
            }
        }

        return resultString;
    }

修改過之後的代碼

 public static String doPostJson(String url, Map<String, String> headers, String json) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            HttpPost httpPost = new HttpPost(url);
            if (headers != null) {
                for (String key : headers.keySet()) {
                    httpPost.addHeader(key, headers.get(key));
                }
            }
            httpPost.setHeader("HTTP Method", "POST");
            httpPost.setHeader("Connection", "Keep-Alive");
            httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");
            //！！！！！這裏改了！！！！！！
            StringEntity entity = new StringEntity(json,"UTF-8");
            entity.setContentType("application/json;charset=UTF-8");
            httpPost.setEntity(entity);
            response = httpClient.execute(httpPost);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            logger.error("doPost, error:", e.toString());
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                logger.error("doPost, error:", e.toString());
            }
        }

        return resultString;
    }

關於編碼問題，發現一篇博客講的很透徹：
深入分析 Java 中的中文編碼問題