使用URLConnection提交請求

package com.example.url;

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map;

import android.util.Log;

/**

• @author cheyx attention:若是既要使用輸入流讀取URLConnection響應的內容,也要使用輸出流 <br>

• 發送請求參數,必定要先使用輸出流,再使用輸入流

/ 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=value&name2=value2的形式 * @return URL所表明遠程資源的相應 / public static String sendGet(String url, String params) { String result = ""; BufferedReader in = null; try { String urlName = url + "?" + params; URL realUrl = new URL(urlName); // 打開和URL之間的鏈接 URLConnection conn = realUrl.openConnection(); // 設置通用的請求屬性 conn.setRequestProperty("accept", "/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); // 創建實際的鏈接 conn.connect(); // 獲取全部響應的頭字段 Map<String, List<String>> map = conn.getHeaderFields(); for (String key : map.keySet()) { System.out.println(key + "---------->" + map.get(key)); Log.i("kkk", key + "---------->" + map.get(key)); } // 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 += "\n" + line; } } catch (Exception e) { System.out.println("發送GET請求出現異常" + e); e.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return result; }

/**
 * 向指定的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
 * @return 所表明遠程資源的響應
 */
public static String sendPost(String url, String params) {
	PrintWriter out = null;
	BufferedReader in = null;
	String result = "";
	try {
		URL realUrl = new URL(url);
		URLConnection conn = realUrl.openConnection();
		// 設置通用的請求屬性
		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請求必須設置以下兩行
		conn.setDoOutput(true);
		conn.setDoInput(true);
		// 獲取URLConnection對象對應的輸出流
		out = new PrintWriter(conn.getOutputStream());
		// 發送請求參數
		out.print(params);
		// 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 += "\n" + line;
		}
	} catch (Exception e) {
		System.out.println("發送POST請求出現錯誤" + e);
		e.printStackTrace();
	} finally {
		try {
			if (out != null)
				out.close();
			if (in != null)
				in.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	return result;
}

}

Button get = (Button) findViewById(R.id.get); get.setOnClickListener(new OnClickListener() {

@Override
		public void onClick(View v) {
			String url = "http://192.168.1.101:8080/WebTest/a.jsp";
			String response = GetPostUtil.sendGet(url, null);
			content.setText(response);
		}
	});
	Button post = (Button) findViewById(R.id.post);
	post.setOnClickListener(new OnClickListener() {
		@Override
		public void onClick(View v) {
			String url = "http://192.168.1.101:8080/WebTest/login.jsp";
			String params = "name=crazyit.org&pass=leegang";
			String response = GetPostUtil.sendPost(url, params);
			content.setText(response);
		}
	});