代码：
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.List; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.ParseException; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicHeader; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; import org.codehaus.jettison.json.JSONException; import org.codehaus.jettison.json.JSONObject; public class HttpUtils { static Logger logger = Logger.getLogger(HttpUtils.class); public static JSONObject httpGet(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setRequestProperty("Content-Type", "text/json;charset=utf-8"); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return new JSONObject(buf.toString().trim()); } public static String httpGet1(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setRequestProperty("Content-Type", "text/json;charset=utf-8"); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return buf.toString().trim(); } public static String httpGet2(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setRequestProperty("Content-Type", "application/json; charset=utf-8"); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return buf.toString().trim(); } public static String httpPut(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("PUT"); conn.setRequestProperty("Content-Type", "application/json; charset=utf-8"); int code = conn.getResponseCode(); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); logger.error("code=" + conn.getResponseCode()); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return (buf.toString().trim()) != null ? (buf.toString().trim()) : (code + ""); } public static JSONObject httpPost(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "text/json;charset=utf-8"); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return new JSONObject(buf.toString().trim()); } public static JSONObject httpPost(String urlStr, String postText) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); byte[] bytes = postText.getBytes("utf-8"); OutputStream os = conn.getOutputStream(); os.write(bytes); os.close(); // BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); // inputLine = in.readLine(); } in.close(); // return new JSONObject(buf.toString().trim()); } public static Object post(List<NameValuePair> message, String to) throws ParseException, IOException, JSONException { HttpPost post = new HttpPost(to); UrlEncodedFormEntity params = new UrlEncodedFormEntity(message, "UTF-8"); post.setEntity(params); System.out.println(("[] Post "" + message + "" to " + post.getURI())); CloseableHttpClient client = HttpClients.createDefault(); CloseableHttpResponse response = client.execute(post); int statusCode = response.getStatusLine().getStatusCode(); System.out.println("[] Server Status Code: " + statusCode); String respString = null; HttpEntity entity = response.getEntity(); if (entity != null) { respString = EntityUtils.toString(entity, "UTF-8"); } System.out.println("[] Server return: " + respString); EntityUtils.consume(entity); JSONObject result = new JSONObject(respString.trim()); if (result != null && result.has("success") && result.opt("success").equals("true")) { return result.opt("data"); } else { logger.info(message); return "error"; } } public static String httpPostApplication(String urlStr) throws Exception { URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/json;charset=utf-8"); BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); StringBuffer buf = new StringBuffer(); String inputLine = in.readLine(); while (inputLine != null) { buf.append(inputLine).append(" "); inputLine = in.readLine(); } in.close(); // return buf.toString().trim(); } public static String RestfulGet(String url) { String returnString = ""; try { URL restServiceURL = new URL(url); HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL.openConnection(); httpConnection.setRequestMethod("GET"); httpConnection.setRequestProperty("Accept", "application/json"); httpConnection.setRequestProperty("Accept-Charset", "utf-8"); httpConnection.setRequestProperty("contentType", "utf-8"); if (httpConnection.getResponseCode() != 200) { throw new RuntimeException( "HTTP GET Request Failed with Error code : " + httpConnection.getResponseCode()); } BufferedReader responseBuffer = new BufferedReader( new InputStreamReader((httpConnection.getInputStream()), "utf-8")); String output = responseBuffer.readLine(); // System.out.println("Output from Server: "); StringBuffer buf = new StringBuffer(); while (output != null) { buf.append(output).append(" "); output = responseBuffer.readLine(); } responseBuffer.close(); httpConnection.disconnect(); returnString = buf.toString().trim(); } catch (Exception e) { e.printStackTrace(); } return returnString; } public static String RestfulPost(String url, String input) { String result = ""; try { URL targetUrl = new URL(url); HttpURLConnection httpConnection = (HttpURLConnection) targetUrl.openConnection(); httpConnection.setDoOutput(true); httpConnection.setRequestMethod("POST"); httpConnection.setRequestProperty("Charsert", "UTF-8"); httpConnection.setRequestProperty("Content-Type", "application/json"); OutputStream outputStream = httpConnection.getOutputStream(); outputStream.write(input.getBytes()); outputStream.flush(); if (httpConnection.getResponseCode() != 200) { throw new RuntimeException("Failed : HTTP error code : " + httpConnection.getResponseCode()); } BufferedReader responseBuffer = new BufferedReader( new InputStreamReader((httpConnection.getInputStream()), "UTF-8")); String output; System.out.println("Output from Server: "); StringBuffer buf = new StringBuffer(); while ((output = responseBuffer.readLine()) != null) { buf.append(output).append(" "); } httpConnection.disconnect(); responseBuffer.close(); result = buf.toString().trim(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return result; } public static org.codehaus.jettison.json.JSONObject post(net.sf.json.JSONObject json, String to) throws ParseException, IOException, JSONException { CloseableHttpClient client = HttpClients.createDefault(); HttpPost post = new HttpPost(to); post.setHeader("Content-Type", "application/json"); org.codehaus.jettison.json.JSONObject result = null; java.io.InputStream inStream = null; try { StringEntity s = new StringEntity(json.toString(), "utf-8"); s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); post.setEntity(s); // 发送请求 HttpResponse httpResponse = client.execute(post); // 获取响应输入流 inStream = httpResponse.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inStream, "utf-8")); StringBuilder strber = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { strber.append(line + " "); } inStream.close(); if (httpResponse.getStatusLine().getStatusCode() == 200) { result = new org.codehaus.jettison.json.JSONObject(strber.toString()); } else { logger.error("请求服务端失败" + json); } } catch (Exception e) { e.printStackTrace(); } return result; } public static net.sf.json.JSONObject doPutOrPost(String type, String urlString, net.sf.json.JSONObject jsonObject, String callMethed) { try { String result = ""; String info = callMethed + ",调用SDK的restful接口URL:" + urlString + ",请求参数:" + jsonObject.toString() + ",请求方式:" + type; logger.info(info); URL url = new URL(urlString); int code = 0; // 打开restful链接 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 提交模式 conn.setRequestMethod(type); conn.setConnectTimeout(200000);// 连接超时 单位毫秒 conn.setReadTimeout(200000);// 读取超时 单位毫秒 conn.setDoOutput(true);// 是否输入参数 conn.setDoInput(true); // 设置访问提交模式，表单提交 conn.setRequestProperty("Content-Type", "application/json"); // 设置请求头 // conn.setRequestProperty(SDKKeyName, SDKKey); // conn.setRequestProperty(SDKValueName, SDKValue); // ----------------传入数据---------------------- OutputStream outputStream = conn.getOutputStream(); outputStream.write(jsonObject.toString().getBytes()); code = conn.getResponseCode(); outputStream.flush(); // 判断是否创建成功 logger.info(info + ",调用所得code值为:" + code); System.out.println("---------code=" + code); if (code == 200) {// 执行成功 BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8")); StringBuffer buffer = new StringBuffer(); String line = ""; while ((line = reader.readLine()) != null) { buffer.append(line); } reader.close(); result = buffer.toString(); logger.info(info + ",调用结果信息为:" + result); net.sf.json.JSONObject jsonObj = net.sf.json.JSONObject.fromObject(result); return jsonObj; } else { BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getErrorStream(), "utf-8")); StringBuffer buffer = new StringBuffer(); String line = ""; while ((line = reader.readLine()) != null) { buffer.append(line); } reader.close(); result = buffer.toString(); logger.info(info + ",调用结果信息为:" + result); net.sf.json.JSONObject jsonObj = net.sf.json.JSONObject.fromObject(result); return jsonObj; } } catch (Exception e) { logger.error("请求失败", e); return null; } } public static int intOf(Object obj, int initValue) { // 1.判断参数是否合法 if (obj == null || "".equals(obj)) { return initValue; } else { try { return Integer.parseInt(obj.toString()); } catch (Exception e) { e.getMessage(); return initValue; } } } }