使用URLConnection提交请求

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:若是既要使用输入流读取URLConnection响应的内容,也要使用输出流 <br>

• 发送请求参数,必定要先使用输出流,再使用输入流

/ public class GetPostUtil { /* * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param params请求参数 * ,请求参数应该是name1=value&name2=value2的形式 * @return URL所表明远程资源的相应 / public static String sendGet(String url, String params) { String result = ""; BufferedReader in = null; try { String urlName = url + "?" + params; URL realUrl = new URL(urlName); // 打开和URL之间的链接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 conn.setRequestProperty("accept", "/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); // 创建实际的链接 conn.connect(); // 获取全部响应的头字段 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)); } // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += "\n" + line; } } catch (Exception e) { System.out.println("发送GET请求出现异常" + 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发送POST方法的请求
 * 
 * @param url发送请求的ＵＲＬ
 * @param params请求参数
 *            ，请求参数应该是name1=value1&name2=value2
 * @return 所表明远程资源的响应
 */
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();
		// 设置通用的请求属性
		conn.setRequestProperty("accept", "*/*");
		conn.setRequestProperty("connection", "Keep-Alive");
		conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
		// 发送POST请求必须设置以下两行
		conn.setDoOutput(true);
		conn.setDoInput(true);
		// 获取URLConnection对象对应的输出流
		out = new PrintWriter(conn.getOutputStream());
		// 发送请求参数
		out.print(params);
		// flush输出流的缓冲
		out.flush();
		// 定义BufferedReader输入流来读取URL的响应
		in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
		String line;
		while ((line = in.readLine()) != null) {
			result += "\n" + line;
		}
	} catch (Exception e) {
		System.out.println("发送POST请求出现错误" + 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);
		}
	});