HTTP请求工具类

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闲着没有事情，封装了一个HttpClient请求工具类，包含了超时时间，设置代理，支持HTTP与HTTPS, 已经GET和POST两种网络请求方式，复制代码到你的项目就能用！！

package com.mars.test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.params.ConnPerRouteBean;
import org.apache.http.conn.params.ConnRoutePNames;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.protocol.HTTP;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Proxy;
import android.text.TextUtils;

/**
 * HTTP请求工具类
 * 
 * @author Administrator
 * 
 */
public class HttpUtils {

	private static final String TAG = "HttpUtils";

	private static final int DEFAULT_SOCKET_BUFFER_SIZE = 8 * 1024; // 8KB
	private static final int MAX_CONNECTIONS = 10; // HTTP请求最大并发连接数
	private static final int SOCKET_TIMEOUT = 55 * 1000; // 55s

	private static final String MAP_KEY_APN = "apn";
	private static final String MAP_KEY_APN_PROXY = "apn_proxy";
	private static final String MAP_KEY_APN_PORT = "apn_port";

	@SuppressWarnings("deprecation")
	public static HashMap<String, Object> getNetInfo(Context context) {
		HashMap<String, Object> hashMap = null;

		ConnectivityManager manager = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);

		NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();
		if (null != activeNetworkInfo) {
			if (ConnectivityManager.TYPE_MOBILE == activeNetworkInfo.getType()) {

				String apn = activeNetworkInfo.getExtraInfo();
				String apnProxy = Proxy.getDefaultHost();
				int apnPort = Proxy.getDefaultPort();

				hashMap = new HashMap<String, Object>();
				hashMap.put(MAP_KEY_APN, apn);
				hashMap.put(MAP_KEY_APN_PROXY, apnProxy);
				hashMap.put(MAP_KEY_APN_PORT, apnPort);
			}
		}
		return hashMap;
	}

	/**
	 * 创建并初始化HttpClient对象
	 * 
	 * @return
	 */
	public static DefaultHttpClient create(Context context, String url) {
		DefaultHttpClient httpClient = null;

		BasicHttpParams httpParams = new BasicHttpParams();
		ConnManagerParams.setTimeout(httpParams, SOCKET_TIMEOUT);
		ConnManagerParams.setMaxConnectionsPerRoute(httpParams,
				new ConnPerRouteBean(MAX_CONNECTIONS));
		ConnManagerParams.setMaxTotalConnections(httpParams, 10);
		HttpConnectionParams.setSoTimeout(httpParams, SOCKET_TIMEOUT);
		HttpConnectionParams.setConnectionTimeout(httpParams, SOCKET_TIMEOUT);
		HttpConnectionParams.setTcpNoDelay(httpParams, true);
		HttpConnectionParams.setSocketBufferSize(httpParams,
				DEFAULT_SOCKET_BUFFER_SIZE);

		String agentProperty = System.getProperty("http.agent");
		if (!TextUtils.isEmpty(agentProperty)) {
			httpParams.setParameter(CoreProtocolPNames.USER_AGENT,
					System.getProperty("http.agent"));
		}

		if (null != url && url.startsWith("https://")) {

			// 支持HTTP与HTTPS
			SchemeRegistry schemeRegistry = new SchemeRegistry();
			schemeRegistry.register(new Scheme("http", PlainSocketFactory
					.getSocketFactory(), 80));
			schemeRegistry.register(new Scheme("https", SSLSocketFactory
					.getSocketFactory(), 443));

			// ThreadSafeClientConnManager线程安全管理类
			ThreadSafeClientConnManager cm = new ThreadSafeClientConnManager(
					httpParams, schemeRegistry);
			httpClient = new DefaultHttpClient(cm, httpParams);

		} else {
			httpClient = new DefaultHttpClient(httpParams);
		}

		HashMap<String, Object> netInfo = getNetInfo(context);

		if (null != netInfo) {
			String apn = (String) netInfo.get(MAP_KEY_APN);
			String apnProxy = (String) netInfo.get(MAP_KEY_APN_PROXY);
			int apnPort = (Integer) netInfo.get(MAP_KEY_APN_PORT);

			// 判断是否需要设置代理信息
			if (null != apn && !"".equals(apnProxy) && null != apnProxy
					&& -1 != apnPort) {

				// 设置代理信息
				HttpHost host = new HttpHost(apnProxy, apnPort);
				httpClient.getParams().setParameter(
						ConnRoutePNames.DEFAULT_PROXY, host);
			}
		}

		return httpClient;
	}

	/**
	 * 将JSON 发送至后台服务器
	 * 
	 * @param jsonString
	 * @return 服务器可能返回的响应数据
	 * @throws IOException
	 * @throws IllegalStateException
	 */
	public static String sendJson2Server(Context context, String jsonString,
			List<BasicNameValuePair> params, String sendAddress)
			throws IllegalStateException, IOException {
		if (null != sendAddress) {
			HttpPost post = new HttpPost(sendAddress);
			// ByteArrayEntity entity = null;
			ByteArrayOutputStream out = null;
			InputStream in = null;
			LogUtil.info(TAG, "sending data to " + sendAddress);

			try {
				// entity = new ByteArrayEntity(jsonString.getBytes("utf-8"));
				post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
				HttpClient client = create(context, sendAddress);

				HttpResponse response = client.execute(post);
				int responseCode = response.getStatusLine().getStatusCode();
				LogUtil.info(TAG, "response code: " + responseCode);
				if (200 == responseCode) {
					in = response.getEntity().getContent();
					byte[] buf = new byte[1024];
					int len;
					out = new ByteArrayOutputStream();
					while (-1 != (len = in.read(buf))) {
						out.write(buf, 0, len);
					}
					byte[] byteArray = out.toByteArray();

					return new String(byteArray, "utf-8");
				}
			} finally {
				if (null != out) {
					try {
						out.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				if (null != in) {
					try {
						in.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		}

		return null;
	}

	/**
	 * 从服务器获取数据
	 * 
	 * @return
	 * @throws IOException
	 */
	public static String getDataFromServer(Context context, String url)
			throws IOException {
		HttpGet get = new HttpGet(url);
		HttpResponse execute = null;
		ByteArrayOutputStream out = null;
		InputStream content = null;
		try {
			HttpClient httpClient = create(context, url);
			execute = httpClient.execute(get);
			if (200 == execute.getStatusLine().getStatusCode()) {
				content = execute.getEntity().getContent();
				out = new ByteArrayOutputStream();
				byte[] buf = new byte[1024];
				int len;
				while (-1 != (len = content.read(buf))) {
					out.write(buf, 0, len);
				}
				return new String(out.toByteArray(), "utf-8");
			}

		} finally {
			if (out != null) {
				out.close();
			}
			if (content != null) {
				content.close();
			}
		}
		return null;
	}

}

HTTP请求工具类

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原文地址：http://blog.csdn.net/a_ycmbc/article/details/51363820