java中post和get请求
示例代码:
package com.shareboxes.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import org.junit.Ignore; import org.junit.Test; /** * @ClassName: HttpRequest * @Description: get,post请求 * @author Administrator * @date 2015年10月19日 * */ public class HttpRequest { /** * @Title: sendGet * @Description: get请求 * @param url * @param param */ public static String sendGet(String url, Map<String, String> param) { BufferedReader bReader = null; StringBuffer sBuffer = new StringBuffer(); String realUrl = url; try { if (param.size() > 0) { realUrl += "?"; for (Entry<String, String> entry : param.entrySet()) { realUrl += entry.getKey() + "=" + entry.getValue() + "&"; } realUrl = realUrl.substring(0, realUrl.length() - 1); } URL urlString = new URL(realUrl); URLConnection urlConnection = urlString.openConnection(); HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection; httpURLConnection.setRequestMethod("GET");// 设置请求方法 httpURLConnection.setConnectTimeout(30000);// 连接主机超时时间 httpURLConnection.setReadTimeout(30000);// 读取数据超时时间 httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置请求数据的格式 httpURLConnection.setRequestProperty("Connection", "Keep-Alive"); httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");// 设置接收数据的编码 // 判断连接是否异常 if (httpURLConnection.getResponseCode() >= 300) { throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode()); } System.out.println(httpURLConnection.getResponseCode()); for(Entry<String, List<String>>entry:httpURLConnection.getHeaderFields().entrySet()){ System.out.println(entry.getKey()+"--------->"+entry.getValue()); } bReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "utf-8")); String line = null; while ((line = bReader.readLine()) != null) { sBuffer.append(line); } } catch (Exception e) { System.out.println("get 请求发生错误!!!"); e.printStackTrace(); } finally { if (bReader != null) { try { bReader.close(); } catch (IOException e) { e.printStackTrace(); } } } return sBuffer.toString(); } /** * @Title: sendPost * @Description: post请求 * @param url * @param param */ public static String sendPost(String url, Map<String, String> param) { BufferedReader bReader = null; OutputStreamWriter out = null; StringBuffer sBuffer = new StringBuffer(); String parameterData =""; try { if (param.size() > 0) { for (Entry<String, String> entry : param.entrySet()) { parameterData += entry.getKey() + "=" + entry.getValue() + "&"; } parameterData = parameterData.substring(0, parameterData.length() - 1); } URL realUrl = new URL(url); HttpURLConnection httpURLConnection = (HttpURLConnection) realUrl.openConnection(); httpURLConnection.setConnectTimeout(30000); httpURLConnection.setReadTimeout(30000); httpURLConnection.setRequestMethod("POST"); httpURLConnection.setDoOutput(true); httpURLConnection.setDoInput(true); httpURLConnection.setUseCaches(false); httpURLConnection.setInstanceFollowRedirects(true); httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置请求参数的格式 httpURLConnection.setRequestProperty("Connection", "Keep-Alive"); httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");// 接收数据的编码 if((parameterData.trim().length()>0) && (!parameterData.equals(""))){ out = new OutputStreamWriter(httpURLConnection.getOutputStream(), "utf-8"); out.write(parameterData); out.flush(); } // 判断连接是否异常 if (httpURLConnection.getResponseCode() >= 300) { throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode()); } System.out.println(httpURLConnection.getResponseCode()); for(Entry<String, List<String>>entry:httpURLConnection.getHeaderFields().entrySet()){ System.out.println(entry.getKey()+"--------->"+entry.getValue()); } // bReader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(), "utf-8")); // String line = null; // while ((line = bReader.readLine()) != null) { // sBuffer.append(line); // } InputStream in=httpURLConnection.getInputStream(); byte []data=new byte[httpURLConnection.getContentLength()]; int offset=0; while(offset<in.available()){ offset+=in.read(data, offset, in.available()-offset); System.out.println(offset); } sBuffer.append(new String(data,"utf-8")); } catch (Exception e) { System.out.println("post 请求失败!!!"); e.printStackTrace(); } finally { try { if (out != null) { out.close(); } if (bReader != null) { bReader.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return sBuffer.toString(); } @Test @Ignore public void testGet() { Map<String, String> param = new HashMap<String, String>(); param.put("tid", "1"); System.out.println(sendGet("http://localhost:8080/shareboxes/record/getrecord/tid.do", param)); } @Test public void testPost() { Map<String, String> param = new HashMap<String, String>(); param.put("tid", "1"); System.out.println(sendPost("http://localhost:8080/shareboxes/record/getrecord/tid.do", param)); } }
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