http://www.cnblogs.com/zhuawang/archive/2012/12/08/2809380.html
get和post方法
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; public class HttpRequest { /** * 向指定URL傳送GET方法的請求 * * @param url * 傳送請求的URL * @param param * 請求引數,請求引數應該是 name1=value1&name2=value2 的形式。 * @return URL 所代表遠端資源的響應結果 */ public static String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 開啟和URL之間的連線 URLConnection connection = realUrl.openConnection(); // 設定通用的請求屬性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立實際的連線 connection.connect(); // 獲取所有響應頭欄位 Map<String, List<String>> map = connection.getHeaderFields(); // 遍歷所有的響應頭欄位 for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); } // 定義 BufferedReader輸入流來讀取URL的響應 in = new BufferedReader(new InputStreamReader( connection.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("傳送GET請求出現異常!" + e); e.printStackTrace(); } // 使用finally塊來關閉輸入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定 URL 傳送POST方法的請求 * * @param url * 傳送請求的 URL * @param param * 請求引數,請求引數應該是 name1=value1&name2=value2 的形式。 * @return 所代表遠端資源的響應結果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 開啟和URL之間的連線 URLConnection conn = realUrl.openConnection(); // 設定通用的請求屬性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 傳送POST請求必須設定如下兩行 conn.setDoOutput(true); conn.setDoInput(true); // 獲取URLConnection物件對應的輸出流 out = new PrintWriter(conn.getOutputStream()); // 傳送請求引數 out.print(param); // flush輸出流的緩衝 out.flush(); // 定義BufferedReader輸入流來讀取URL的響應 in = new BufferedReader( new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("傳送 POST 請求出現異常!"+e); e.printStackTrace(); } //使用finally塊來關閉輸出流、輸入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } }
呼叫
public static void main(String[] args) { //傳送 GET 請求 String s=HttpRequest.sendGet("http://localhost:6144/Home/RequestString", "key=123&v=456"); System.out.println(s); //傳送 POST 請求 String sr=HttpRequest.sendPost("http://localhost:6144/Home/RequestPostString", "key=123&v=456"); System.out.println(sr); }
2、post方法
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; public class Test { public static void main(String[] args) throws IOException { String urlStr = "http://translate.googleapis.com/translate_a/t?" + "anno=3&client=te&format=html&v=1.0&logld=v10"; URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setDoOutput(true); // 可以傳送資料 conn.setDoInput(true); // 可以接收資料 conn.setRequestMethod("POST"); // POST方法 // 必須注意此處需要設定UserAgent,否則google會返回403 conn.setRequestProperty ("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.connect(); // 寫入的POST資料 OutputStreamWriter osw = new OutputStreamWriter(conn.getOutputStream(), "UTF-8"); osw.write("q=中國&sl=auto&tl=en&tc=1"); osw.flush(); osw.close(); // 讀取響應資料 BufferedReader in = new BufferedReader( new InputStreamReader(conn.getInputStream())); String s; while ((s = in.readLine()) != null) System.out.println(s); } }