importjava.io.BufferedReader;importjava.io.DataOutputStream;importjava.io.InputStreamReader;importjava.net.HttpURLConnection;importjava.net.URL;importjava.util.List;importjava.util.Map;/*** http 工具类*/

public classHttpUtil {public staticString post(String requestUrl, String accessToken, String params)throwsException {

String contentType= "application/x-www-form-urlencoded";returnHttpUtil.post(requestUrl, accessToken, contentType, params);

}public staticString post(String requestUrl, String accessToken, String contentType, String params)throwsException {

String encoding= "UTF-8";if (requestUrl.contains("nlp")) {

encoding= "GBK";

}returnHttpUtil.post(requestUrl, accessToken, contentType, params, encoding);

}public staticString post(String requestUrl, String accessToken, String contentType, String params, String encoding)throwsException {

String url= requestUrl + "?access_token=" +accessToken;returnHttpUtil.postGeneralUrl(url, contentType, params, encoding);

}public staticString postGeneralUrl(String generalUrl, String contentType, String params, String encoding)throwsException {

URL url= newURL(generalUrl);//打开和URL之间的连接

HttpURLConnection connection =(HttpURLConnection) url.openConnection();

connection.setRequestMethod("POST");//设置通用的请求属性

connection.setRequestProperty("Content-Type", contentType);

connection.setRequestProperty("Connection", "Keep-Alive");

connection.setUseCaches(false);

connection.setDoOutput(true);

connection.setDoInput(true);//得到请求的输出流对象

DataOutputStream out = newDataOutputStream(connection.getOutputStream());

out.write(params.getBytes(encoding));

out.flush();

out.close();//建立实际的连接

connection.connect();//获取所有响应头字段

Map> headers =connection.getHeaderFields();//遍历所有的响应头字段

for(String key : headers.keySet()) {//System.err.println(key + "--->" + headers.get(key));

}//定义 BufferedReader输入流来读取URL的响应

BufferedReader in = null;

in= newBufferedReader(newInputStreamReader(connection.getInputStream(), encoding));

String result= "";

String getLine;while ((getLine = in.readLine()) != null) {

result+=getLine;

}

in.close();//System.err.println("result:" + result);

returnresult;

}

}