《瘋狂android講義》上http請求（get方式.post方式）

package com.example.downloadthread;import java.io.*;import java.net.*;import java.util.*;/** * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */public class GetPostUtil {/** * 向指定URL發送GET方法的請求 *  * @param url *            發送請求的URL * @param params *            請求參數，請求參數應該是name1=value1&name2=value2的形式。 * @return URL所代表遠端資源的響應 */public static String sendGet(String url, String params) {String result = "";BufferedReader in = null;try {String urlName = url + "?" + params;URL realUrl = new URL(urlName);// 開啟和URL之間的串連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)");// 建立實際的串連conn.connect();// 擷取所有回應標頭欄位Map<String, List<String>> map = conn.getHeaderFields();// 遍曆所有的回應標頭欄位for (String key : map.keySet()) {System.out.println(key + "--->" + map.get(key));}// 定義BufferedReader輸入資料流來讀取URL的響應in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "GB2312"));String line;while ((line = in.readLine()) != null) {result += "\n" + line;}} catch (Exception e) {System.out.println("發送GET請求出現異常！" + e);e.printStackTrace();}// 使用finally塊來關閉輸入資料流finally {try {if (in != null) {in.close();}} catch (IOException ex) {ex.printStackTrace();}}return result;}/** * 向指定URL發送POST方法的請求 *  * @param url *            發送請求的URL * @param params *            請求參數，請求參數應該是name1=value1&name2=value2的形式。 * @return URL所代表遠端資源的響應 */public static String sendPost(String url, String params) {PrintWriter out = null;BufferedReader in = null;String result = "";try {URL realUrl = new URL(url);// 開啟和URL之間的串連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)");// 發送POST請求必須設定如下兩行conn.setDoOutput(true);conn.setDoInput(true);// 擷取URLConnection對象對應的輸出資料流out = new PrintWriter(conn.getOutputStream());// 發送請求參數out.print(params);// flush輸出資料流的緩衝out.flush();// 定義BufferedReader輸入資料流來讀取URL的響應in = new BufferedReader(new InputStreamReader(conn.getInputStream()));String line;while ((line = in.readLine()) != null) {result += "\n" + line;}} catch (Exception e) {System.out.println("發送POST請求出現異常！" + e);e.printStackTrace();}// 使用finally塊來關閉輸出資料流、輸入資料流finally {try {if (out != null) {out.close();}if (in != null) {in.close();}} catch (IOException ex) {ex.printStackTrace();}}return result;}}