jdk HttpURLConnection类请求http接口工具类

2019-11-06 06:19:07

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import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;public class HttpUtil {// post请求public static final String HTTP_POST = "POST";// get请求public static final String HTTP_GET = "GET";// utf-8字符编码public static final String CHARSET_UTF_8 = "UTF-8";// HTTP内容类型public static final String CONTENT_TYPE_TEXT_HTML = "text/xml";// HTTP内容类型public static final String CONTENT_TYPE_FORM_URL = "application/x-www-form-urlencoded;charset=" + CHARSET_UTF_8;// 请求超时时间public static final int SEND_REQUEST_TIME_OUT = 20000;// 将读超时时间public static final int READ_TIME_OUT = 20000;/*** * @param requestType* 请求类型* @param urlStr* 请求地址* @param body* 请求发送内容* @return 返回内容* @throws Exception */public static String requestMethod(String requestType, String urlStr, String body) throws Exception {//long star = System.currentTimeMillis();boolean isDoInput = false;if (body != null && body.length() > 0){isDoInput = true;}OutputStream outputStream = null;OutputStreamWriter outputStreamWriter = null;InputStream inputStream = null;InputStreamReader inputStreamReader = null;BufferedReader reader = null;StringBuffer resultBuffer = new StringBuffer();String tempLine = null;try {URL url = new URL(urlStr);URLConnection urlConnection = url.openConnection();HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;if (isDoInput) {httpURLConnection.setDoOutput(true);httpURLConnection.setRequestPRoperty("Content-Length", String.valueOf(body.length()));}httpURLConnection.setDoInput(true);httpURLConnection.setConnectTimeout(SEND_REQUEST_TIME_OUT);httpURLConnection.setReadTimeout(READ_TIME_OUT);httpURLConnection.setUseCaches(false);//httpURLConnection.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.8) Firefox/3.6.8"); httpURLConnection.setRequestProperty("Accept-Charset", CHARSET_UTF_8);httpURLConnection.setRequestProperty("Content-Type", CONTENT_TYPE_FORM_URL);httpURLConnection.setRequestMethod(requestType);httpURLConnection.connect();if (isDoInput) {outputStream = httpURLConnection.getOutputStream();outputStreamWriter = new OutputStreamWriter(outputStream);outputStreamWriter.write(body);outputStreamWriter.flush();// 刷新}if (httpURLConnection.getResponseCode() >= 300) {throw new Exception("http error code is :" + httpURLConnection.getResponseCode());}if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {inputStream = httpURLConnection.getInputStream();inputStreamReader = new InputStreamReader(inputStream, CHARSET_UTF_8);reader = new BufferedReader(inputStreamReader);while ((tempLine = reader.readLine()) != null) {resultBuffer.append(tempLine);}}//httpURLConnection.disconnect();} catch (MalformedURLException e) {e.printStackTrace();} finally {// 关闭流try {if (outputStreamWriter != null) {outputStreamWriter.close();}} catch (Exception e) {e.printStackTrace();}try {if (outputStream != null) {outputStream.close();}} catch (Exception e) {e.printStackTrace();}try {if (reader != null) {reader.close();}} catch (Exception e) {e.printStackTrace();}try {if (inputStreamReader != null) {inputStreamReader.close();}} catch (Exception e) {e.printStackTrace();}try {if (inputStream != null) {inputStream.close();}} catch (Exception e) {e.printStackTrace();}}//System.out.println("耗时："+(System.currentTimeMillis()-star)+"毫秒");return resultBuffer.toString();}/*** 请求重试机制二次请求需等待0.5秒* @param requestType 请求类型* @param action 请求接口* @param params 请求参数 json格式* @param retry true-重试, false-不重试* @return*/public static String retryHandler(String requestType, String action, String params, boolean retry){try {return requestMethod(requestType,action,params);} catch (Exception e) {e.printStackTrace();if(retry){try {Thread.sleep(500);return requestMethod(requestType,action,params);} catch (Exception e1) {e1.printStackTrace();}}}return "-100001"; //服务端接口出错}public static void main(String[] args) {System.out.println("----------------star------------------");System.out.println(ApiInterface.CHANNEL_INFO);//String params = "{/"msgheader/":{/"route_id/":/"LZZBGE/",/"route_name/":/"1/",/"login_type/":/"1/",/"mobile/":/"1/",/"timestamp/":/"1/"},/"msgbody/":{/"nonce/":/"1/",/"sign/":/"7BBC156C8D9586E4B874385059FB966F/"}}";String params = "{/"msgheader/":{},/"msgbody/":{/"keyWord/":/"/",/"sign/":/"DAA6320AE7D6C11F369E80808E52A697/"}}";try {System.out.println(requestMethod(HTTP_POST,ApiInterface.PRODUCT_LIST,params));} catch (Exception e) {e.printStackTrace();System.out.println("Exception");}System.out.println("----------------end------------------");}}

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