Android中使用HttpClient

最新推荐文章于 2019-06-26 15:29:54 发布

原创最新推荐文章于 2019-06-26 15:29:54 发布 · 1k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个用于处理HTTPS请求的自定义SSLSocketFactoryEx类，并展示了如何使用它来创建支持HTTPS的HttpClient实例。此外，还提供了GET和POST请求的具体实现。

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SSLSocketFactoryEx 类

package com.momting.utils;

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.conn.ssl.SSLSocketFactory;

public class SSLSocketFactoryEx extends SSLSocketFactory {

	SSLContext sslContext = SSLContext.getInstance("TLS");

	public SSLSocketFactoryEx(KeyStore truststore)

	throws NoSuchAlgorithmException, KeyManagementException,

	KeyStoreException, UnrecoverableKeyException {

		super(truststore);

		TrustManager tm = new X509TrustManager() {

			public java.security.cert.X509Certificate[] getAcceptedIssuers() {

				return null;

			}

			@Override
			public void checkClientTrusted(

			java.security.cert.X509Certificate[] chain, String authType)

			throws java.security.cert.CertificateException {

			}

			@Override
			public void checkServerTrusted(

			java.security.cert.X509Certificate[] chain, String authType)

			throws java.security.cert.CertificateException {

			}

		};

		sslContext.init(null, new TrustManager[] { tm }, null);

	}

	@Override
	public Socket createSocket(Socket socket, String host, int port,

	boolean autoClose) throws IOException, UnknownHostException {

		return sslContext.getSocketFactory().createSocket(socket, host, port,

		autoClose);

	}

	@Override
	public Socket createSocket() throws IOException {

		return sslContext.getSocketFactory().createSocket();

	}

}

获取HttpClicent

/**
	 * 获取HttpClient 可用于https请求
	 * 
	 * @return
	 */
	private static HttpClient getHttpClient() {
		try {

			KeyStore trustStore = KeyStore.getInstance(KeyStore
					.getDefaultType());

			trustStore.load(null, null);

			SSLSocketFactory sf = new SSLSocketFactoryEx(trustStore);

			sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

			HttpParams params = new BasicHttpParams();

			HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

			HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

			SchemeRegistry registry = new SchemeRegistry();

			registry.register(new Scheme("http", PlainSocketFactory
					.getSocketFactory(), 80));

			registry.register(new Scheme("https", sf, 443));

			ClientConnectionManager ccm = new ThreadSafeClientConnManager(
					params, registry);

			return new DefaultHttpClient(ccm, params);

		} catch (Exception e) {

			return new DefaultHttpClient();

		}

	}

Request请求

/**
	 * 
	 * @param url
	 *            请求地址
	 * @param params
	 *            参数
	 */
	public static String getRequest(String url, Map<String, Object> params) {
		// 拼接Url
		StringBuffer sb = new StringBuffer(url);
		if (sb.indexOf("?") < 0)
			sb.append("?");

		for (String name : params.keySet()) {
			sb.append('&');
			sb.append(name);
			sb.append('=');
			sb.append(String.valueOf(params.get(name)));
		}
		HttpClient client = getHttpClient();
		try {
			HttpGet get = new HttpGet(sb.toString());
			// Log.d(TAG, "executing request" + get.getURI());
			// 执行get请求
			HttpResponse response = client.execute(get);
			// 获取响应实体
			HttpEntity entity = response.getEntity();
			// 获取响应码
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode == 200) {
				// 获取响应内容长度
				// Log.d(TAG, "响应内容长度" + entity.getContentLength());
				return EntityUtils.toString(entity, "utf-8");
			}

		} catch (Exception e) {

			e.printStackTrace();
			Log.d(TAG, "请求错误" + e.toString());

		} finally {
			// 关闭连接 释放资源
			client.getConnectionManager().shutdown();
		}
		return null;
	};

post请求

	/**
	 * post请求
	 * 
	 * @param url
	 * @param params
	 * @return
	 */
	public static String postRequest(String url,
			LinkedList<BasicNameValuePair> params) {
		HttpClient client = getHttpClient();
		try {
			HttpPost post = new HttpPost(url);
			//
			post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
			HttpResponse response = client.execute(post);
			HttpEntity entity = response.getEntity();
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode == 200) {
				// 获取响应内容长度
				// Log.d(TAG, "响应内容长度" + entity.getContentLength());
				return EntityUtils.toString(entity, "utf-8");
			}
		} catch (Exception e) {

			e.printStackTrace();
		} finally {
			// 关闭连接 释放资源
			client.getConnectionManager().shutdown();
		}
		return null;
	}

参考：http://ipjmc.iteye.com/blog/1577495