发送post请求

最新推荐文章于 2024-05-23 15:08:31 发布

转载最新推荐文章于 2024-05-23 15:08:31 发布 · 92 阅读

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/toudianpingyangni/p/8423779.html

urlParam      URL
* params       参数
* charset      编码

public static String sendPost(String urlParam, Map<String, Object> params, String charset) {
    StringBuffer resultBuffer = null;
    // 构建请求参数
    StringBuffer sbParams = new StringBuffer();
    if (params != null && params.size() > 0) {
        for (Map.Entry<String, Object> e : params.entrySet()) {
            sbParams.append(e.getKey());
            sbParams.append("=");
            sbParams.append(e.getValue());
            sbParams.append("&");
        }
    }
    HttpURLConnection con = null;
    OutputStreamWriter osw = null;
    BufferedReader br = null;
    // 发送请求
    try {
        URL url = new URL(urlParam);
        con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("POST");
        con.setDoOutput(true);
        con.setDoInput(true);
        con.setUseCaches(false);
        con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        if (sbParams != null && sbParams.length() > 0) {
            osw = new OutputStreamWriter(con.getOutputStream(), charset);
            osw.write(sbParams.substring(0, sbParams.length() - 1));
            osw.flush();
        }
        // 读取返回内容
        resultBuffer = new StringBuffer();
        int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));
        if (contentLength > 0) {
            br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));
            String temp;
            while ((temp = br.readLine()) != null) {
                resultBuffer.append(temp);
            }
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (osw != null) {
            try {
                osw.close();
            } catch (IOException e) {
                osw = null;
                throw new RuntimeException(e);
            } finally {
                if (con != null) {
                    con.disconnect();
                    con = null;
                }
            }
        }
        if (br != null) {
            try {
                br.close();
            } catch (IOException e) {
                br = null;
                throw new RuntimeException(e);
            } finally {
                if (con != null) {
                    con.disconnect();
                    con = null;
                }
            }
        }
    }

    return resultBuffer.toString();
}

转载于:https://www.cnblogs.com/toudianpingyangni/p/8423779.html