http post 请求

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import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import com.cmcc.rd.aoi.log.LoggerFactory;
import com.cmcc.rd.aoi.util.DatetimeUtil;

public class HttpPostUtil
{
	/**
	 * 
	 * @param postXML
	 *            放在消息内容体中的字符串
	 * @param url
	 *            要访问的 URL
	 * @return 返回POST请求响应返回的内容体字符串和cookie
	 */
	public static String[] post(String postXML, String url, Map<String, String> map)
	{
		String urlstr = url;
		String servlet_res = null;
		InputStream in = null;
		HttpURLConnection conn = null;
		String setCookie = null;
		try
		{
			LoggerFactory.log("SendTo: " + urlstr);
			URL send_url = new URL(urlstr);

			conn = (HttpURLConnection) send_url.openConnection();
			conn.setConnectTimeout((int) (10 * DatetimeUtil.SECOND));
			conn.setDoOutput(true);
			conn.setUseCaches(false);
			conn.setRequestProperty("Content-type", "application/x-www-form-urlencoded;charset=UTF-8");
			conn.setRequestMethod("POST");
			for (String key : map.keySet())
				conn.setRequestProperty(key, map.get(key));
			conn.connect();

			OutputStream raw = conn.getOutputStream();
			OutputStream buf = new BufferedOutputStream(raw);
			OutputStreamWriter out = new OutputStreamWriter(buf, "UTF-8");
			System.out.println("inputData = " + postXML);
			out.write(postXML);
			out.flush();
			out.close();

			in = conn.getInputStream();
			setCookie = conn.getHeaderField("Set-Cookie");
			// 采用byte流读取

			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			byte[] bytes = new byte[1];
			while (in.read(bytes) != -1)
			{
				baos.write(bytes);
			}
			in.close();
			String ouputData = new String(baos.toByteArray());
			LoggerFactory.log("ouputData = " + ouputData);

			servlet_res = ouputData;
		}
		catch (Exception e)
		{
			LoggerFactory.log(e.getMessage());
			e.printStackTrace();
		}
		finally
		{
			try
			{
				if (in != null)
					in.close();
				if (conn != null)
					conn.disconnect();
			}
			catch (IOException e)
			{
				LoggerFactory.log(e.getMessage());
			}
		}

		return new String[] {servlet_res, setCookie};
	}
	 
}

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http post 请求

原文：http://knight-black-bob.iteye.com/blog/2243550