HttpClient方式模拟http请求
方式一：HttpClient
import org.apache.commons.lang.exception.ExceptionUtils; import org.apache.http.*; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; import java.io.*; import java.util.*; /** * Created by Chen Hongyu on 2016/5/17. */ public class HttpTookit { private static Logger LOGGER = Logger.getLogger(HttpTookit.class); /** * @param args * @throws IOException * @throws ClientProtocolException */ public static void main(String[] args) throws ClientProtocolException, IOException { String urlPost = "http://localhost:8080/collectDataPost.do"; String urlGet = "http://localhost:8080/collectDataGet.do?name=张三"; Map<String, object> params = new HashMap<>(); params.put("name", "jerry"); params.put("age", "18"); params.put("sex", "man"); String respon = doPost(urlPost, params); System.out.println("================发送请求：" + params); System.out.println("================回掉结果：" + respon); } public static void doGet(String url) { try { // 创建HttpClient实例 HttpClient httpclient = new DefaultHttpClient(); // 创建Get方法实例 HttpGet httpgets = new HttpGet(url); HttpResponse response = httpclient.execute(httpgets); HttpEntity entity = response.getEntity(); if (entity != null) { InputStream instreams = entity.getContent(); String str = convertStreamToString(instreams); System.out.println("Do something"); System.out.println(str); // Do not need the rest httpgets.abort(); } } catch (Exception e) { } } public static String convertStreamToString(InputStream is) { BufferedReader reader = new BufferedReader(new InputStreamReader(is)); StringBuilder sb = new StringBuilder(); String line = null; try { while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } return sb.toString(); } public static String doPost(String url, Map<String, String> map) { HttpClient httpClient = new DefaultHttpClient(); HttpPost method = new HttpPost(url); method.setHeader("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"); int status = 0; String body = null; if (method != null & map != null) { try { //建立一个NameValuePair数组，用于存储欲传送的参数 List<NameValuePair> params = new ArrayList<NameValuePair>(); for (Map.Entry<String, String> entry : map.entrySet()) { params.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } //添加参数 method.setEntity(new UrlEncodedFormEntity(params)); long startTime = System.currentTimeMillis(); HttpResponse response = httpClient.execute(method); System.out.println("the http method is:" + method.getEntity()); long endTime = System.currentTimeMillis(); int statusCode = response.getStatusLine().getStatusCode(); LOGGER.info("状态码:" + statusCode); LOGGER.info("调用API 花费时间(单位：毫秒)：" + (endTime - startTime)); if (statusCode != HttpStatus.SC_OK) { LOGGER.error("请求失败:" + response.getStatusLine()); status = 1; } //Read the response body body = EntityUtils.toString(response.getEntity(), "UTF-8"); } catch (IOException e) { //发生网络异常 LOGGER.error("exception occurred!\n" + ExceptionUtils.getFullStackTrace(e)); //网络错误 status = 3; } finally { LOGGER.info("调用接口状态：" + status); } } return body; } }
方式二：HttpURLConnection
import java.io.*; import java.net.HttpURLConnection; import java.net.ProtocolException; import java.net.URL; import java.net.URLEncoder; import java.util.HashMap; import java.util.Map; /** * HTTP工具 * Created by Chen Hongyu on 2016/5/18. */ public class HttpUtil { /** * 请求类型： GET */ public final static String GET = "GET"; /** * 请求类型： POST */ public final static String POST = "POST"; /** * HttpURLConnection方式 模拟Http Get请求 * @param urlStr * 请求路径 * @param paramMap * 请求参数 * @return * @throws Exception */ public static String get(String urlStr, Map<String, String> paramMap) throws Exception { urlStr = urlStr + "?" + getParamString(paramMap); HttpURLConnection conn = null; try { //创建URL对象 URL url = new URL(urlStr); //获取URL连接 conn = (HttpURLConnection) url.openConnection(); //设置通用的请求属性 setHttpUrlConnection(conn, GET); //建立实际的连接 conn.connect(); //获取响应的内容 return readResponseContent(conn.getInputStream()); } finally { if (null != conn) conn.disconnect(); } } /** * HttpURLConnection方式 模拟Http Post请求 * @param urlStr * 请求路径 * @param paramMap * 请求参数 * @return * @throws Exception */ public static String post(String urlStr, Map<String, String> paramMap) throws Exception { HttpURLConnection conn = null; PrintWriter writer = null; try { //创建URL对象 URL url = new URL(urlStr); //获取请求参数 String param = getParamString(paramMap); //获取URL连接 conn = (HttpURLConnection) url.openConnection(); //设置通用请求属性 setHttpUrlConnection(conn, POST); //建立实际的连接 conn.connect(); //将请求参数写入请求字符流中 writer = new PrintWriter(conn.getOutputStream()); writer.print(param); writer.flush(); //读取响应的内容 return readResponseContent(conn.getInputStream()); } finally { if (null != conn) conn.disconnect(); if (null != writer) writer.close(); } } /** * 读取响应字节流并将之转为字符串 * @param in * 要读取的字节流 * @return * @throws IOException */ private static String readResponseContent(InputStream in) throws IOException { Reader reader = null; StringBuilder content = new StringBuilder(); try { reader = new InputStreamReader(in); char[] buffer = new char[1024]; int head = 0; while ((head = reader.read(buffer)) > 0) { content.append(new String(buffer, 0, head)); } return content.toString(); } finally { if (null != in) in.close(); if (null != reader) reader.close(); } } /** * 设置Http连接属性 * @param conn * http连接 * @return * @throws ProtocolException * @throws Exception */ private static void setHttpUrlConnection(HttpURLConnection conn, String requestMethod) throws ProtocolException { conn.setRequestMethod(requestMethod); conn.setRequestProperty("content-encoding", "utf8"); conn.setRequestProperty("accept", "application/json"); conn.setRequestProperty("Accept-Charset", "UTF-8"); conn.setRequestProperty("Accept-Language", "zh-CN"); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)"); conn.setRequestProperty("Proxy-Connection", "Keep-Alive"); System.out.println(conn.getRequestMethod()); if (null != requestMethod && POST.equals(requestMethod)) { conn.setDoOutput(true); conn.setDoInput(true); } } /** * 将参数转为路径字符串 * @param paramMap * 参数 * @return */ private static String getParamString(Map<String, String> paramMap) { if (null == paramMap || paramMap.isEmpty()) { return ""; } StringBuilder builder = new StringBuilder(); for (String key : paramMap.keySet()) { builder.append("&").append(key).append("=").append(paramMap.get(key)); } return new String(builder.deleteCharAt(0).toString()); } public static void main(String[] args) throws UnsupportedEncodingException { String url = "http://localhost:8080/collectData.do"; Map<String, String> params = new HashMap<>(); params.put("name", "jerry"); params.put("age", "18"); params.put("sex", "man"); try { System.out.println(post(url, mapParam)); } catch (Exception e) { e.printStackTrace(); } } }
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