/** * 向指定URL发送POST请求 * * @param url * @param postParam * @return * @return 响应结果 */public String sendPost(String url, String postParam) throws IOException {Map paramMap = new HashMap();postParam=URLEncoder.encode(postParam, "UTF-8");paramMap.put("param", postParam);PrintWriter out = null;BufferedReader in = null;String result = "";try {URL realUrl = new URL(url);// 打开和URL之间的连接URLConnection conn = realUrl.openConnection();// 设置通用的请求属性conn.setRequestProperty("accept", "*/*");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64)");conn.setRequestProperty("Charset", "UTF-8");// 发送POST请求必须设置如下两行conn.setDoOutput(true);conn.setDoInput(true);// 获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());// 设置请求属性String param = "";if (paramMap != null && paramMap.size() > 0) {Iterator ite = paramMap.keySet().iterator();while (ite.hasNext()) {String key = ite.next();// keyString value = paramMap.get(key);param += key + "=" + value + "&";}param = param.substring(0, param.length() - 1);}// 发送请求参数out.print(param);// flush输出流的缓冲out.flush();// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(conn.getInputStream()));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {e.printStackTrace();}// 使用finally块来关闭输出流、输入流finally {try {if (out != null) {out.close();}if (in != null) {in.close();}} catch (IOException ex) {ex.printStackTrace();}}return result;}
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