import org.testng.annotations.Test;
public class HttpTest {
String creatOrderUrl="http://xxx.xxx.net/scriptParams/runScripts?ids=2303";
@Test //可以直接运行了，注意调用http接口，都不能继承别的接口（例如hsf），public void testCrestOrder() { System.out.println("url=="+creatOrderUrl);// httpRequest(creatOrderUrl); //System.out.println("url2=="+httpRequest(creatOrderUrl));}
/**get请求*/public static String httpRequest(String req_url) { StringBuffer buffer = new StringBuffer(); try { URL url = new URL(req_url); HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection(); httpUrlConn.setDoOutput(false); httpUrlConn.setDoInput(true); httpUrlConn.setUseCaches(false); httpUrlConn.setRequestMethod("GET"); httpUrlConn.connect(); // 将返回的输入流转换成字符串 InputStream inputStream = httpUrlConn.getInputStream(); InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8"); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String str = null; while ((str = bufferedReader.readLine()) != null) { buffer.append(str); } bufferedReader.close(); inputStreamReader.close(); // 释放资源 inputStream.close(); inputStream = null; httpUrlConn.disconnect(); } catch (Exception e) { System.out.println(e.getStackTrace()); } return buffer.toString();}
/**POST 请求 * *//** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @param isproxy * 是否使用代理模式 * @return 所代表远程资源的响应结果 */public static String sendPost(String url, String param,boolean isproxy) { OutputStreamWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); HttpURLConnection conn = null; if(isproxy){//使用代理模式 @SuppressWarnings("static-access") Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort)); conn = (HttpURLConnection) realUrl.openConnection(proxy); }else{ conn = (HttpURLConnection) realUrl.openConnection(); } // 打开和URL之间的连接 // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); conn.setRequestMethod("POST"); // POST方法 // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.connect(); // 获取URLConnection对象对应的输出流 out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8"); // 发送请求参数 out.write(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) { System.out.println("发送 POST 请求出现异常！"+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;}/** * 发送Http post请求 * * @param xmlInfo * json转化成的字符串 * @param URL * 请求url * @return 返回信息 */public static String doHttpPost(String xmlInfo, String URL) { System.out.println("发起的数据:" + xmlInfo); byte[] xmlData = xmlInfo.getBytes(); InputStream instr = null; java.io.ByteArrayOutputStream out = null; try { URL url = new URL(URL); URLConnection urlCon = url.openConnection(); urlCon.setDoOutput(true); urlCon.setDoInput(true); urlCon.setUseCaches(false); urlCon.setRequestProperty("content-Type", "application/json"); urlCon.setRequestProperty("charset", "utf-8"); urlCon.setRequestProperty("Content-length", String.valueOf(xmlData.length)); System.out.println(String.valueOf(xmlData.length)); DataOutputStream printout = new DataOutputStream( urlCon.getOutputStream()); printout.write(xmlData); printout.flush(); printout.close(); instr = urlCon.getInputStream(); byte[] bis = IOUtils.toByteArray(instr); String ResponseString = new String(bis, "UTF-8"); if ((ResponseString == null) || ("".equals(ResponseString.trim()))) { System.out.println("返回空"); } System.out.println("返回数据为:" + ResponseString); return ResponseString; } catch (Exception e) { e.printStackTrace(); return "0"; } finally { try { out.close(); instr.close(); } catch (Exception ex) { return "0"; } }}方法二：/** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */public static String sendPostNew(String url, String param) { 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/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 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()); // 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) { System.out.println("发送 POST 请求出现异常！"+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;}｝注意事项：如果调用post接口，返回报错405（连接被拒绝），把post改成GET即可，原因是后台要求是GET请求，发送post请求肯定会被拒绝。
来源：http://www.cnblogs.com/pinganjiankang/p/6401045.html