Android同步网络请求工具类HttpURLConnection

package com.cz.utils;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;

import android.util.Log;

public class HttpUtil {

	private static final String GET = "GET";
	private static final String POST = "POST";
	private static final int connectTimeout = 6000;
	private static final int readTimeout = 30000;

	/**
	 * GET方式发送数据
	 */
	public static String sendGet(String http, String data, String charset) {
		return request(http, data, charset, GET);
	}

	public static String sendGet(String http, HashMap<String, String> map, String charset) {
		return sendGet(http, map, charset, false);
	}

	public static String sendGet(String http, HashMap<String, String> map, String charset, boolean encode) {
		return sendGet(http, praseMap(map, charset, encode), charset);
	}

	/**
	 * POST方式发送数据
	 */
	public static String sendPost(String http, String data, String charset) {
		return request(http, data, charset, POST);
	}

	public static String sendPost(String http, HashMap<String, String> map, String charset) {
		return sendPost(http, map, charset, false);
	}

	public static String sendPost(String http, HashMap<String, String> map, String charset, boolean encode) {
		return sendPost(http, praseMap(map, charset, encode), charset);
	}

	/**
	 * 解析map
	 */
	private static String praseMap(HashMap<String, String> map, String charset, boolean encode) {
		StringBuffer sb = new StringBuffer();
		if (map != null && !map.isEmpty()) {
			try {
				boolean f = true;
				String v;
				for (String k : map.keySet()) {
					if (k != null && !"".equals(k)) {
						v = map.get(k).trim();
						if (!f)
							sb.append("&");
						if (encode)
							v = URLEncoder.encode(v, charset);
						sb.append(k).append("=").append(v);
						f = false;
					}
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return sb.toString().trim();
	}

	private static String request(String http, String data, String charset, String type) {
		StringBuffer sb = new StringBuffer();
		HttpURLConnection conn = null;
		OutputStreamWriter out = null;
		BufferedWriter bw = null;
		InputStreamReader isr = null;
		BufferedReader br = null;
		try {
			if (GET.equals(type) && data != null && !"".equals(data)){
				http = http + "?" + data;
			}
			URL u = new URL(http);
			conn = (HttpURLConnection) u.openConnection();
			conn.setRequestMethod(type);
			conn.setConnectTimeout(connectTimeout);
			conn.setReadTimeout(readTimeout);
			if (POST.equals(type))
				conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.connect();

			// 传送数据
			if (POST.equals(type)) {
				if (data != null && !"".equals(data)) {
					out = new OutputStreamWriter(conn.getOutputStream(), charset);
					bw = new BufferedWriter(out);
					bw.write(data);
					bw.flush();
				}
			}
			// 接收数据
			if (conn.getResponseCode() == 200) {
				isr = new InputStreamReader(conn.getInputStream(), charset);
				br = new BufferedReader(isr);
				String line;
				while ((line = br.readLine()) != null){
					sb.append(line).append(System.getProperty("line.separator"));
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				bw.close();
			} catch (Exception e) {
			}
			try {
				out.close();
			} catch (Exception e) {
			}
			try {
				br.close();
			} catch (Exception e) {
			}
			try {
				isr.close();
			} catch (Exception e) {
			}
			try {
				conn.disconnect();
			} catch (Exception e) {
			}
		}
		Log.e("sb:", sb.toString().trim());
		return sb.toString().trim();
	}

}