HttpClient网络通信

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好记心不如烂笔头，今天看书看到这个知识，记录一下

Apache接口的核心功能时HttpClient，与网络有关的功能几乎都要用到HttpClient,我们可以把HttpClient想象成一个浏览器，通过它的API可以很方便的发出get和post请求

在项目中一般讲HttpClient写成单例模式。

public class CustomerHttpClient {private static final String CHARSET = HTTP.UTF_8;private static HttpClient customerHttpClient;private CustomerHttpClient() {}public static synchronized HttpClient getHttpClient() {if (customerHttpClient == null) {HttpParams params = new BasicHttpParams();// 设置一些参参数HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);HttpProtocolParams.setContentCharset(params, CHARSET);HttpProtocolParams.setUseExpectContinue(params, true);HttpProtocolParams.setUserAgent(params,"Moailla/5.0(Linux;U;Android 3.0;en-us;Nexus One Build.FRG83)"+ "AppleWebkit/553.1(KHTML like Gecko) Version/4.0 Mobile Safari/533.1");// 超时设置/** * 从连接池取连接的超时时间 */ConnManagerParams.setTimeout(params, 1000);/** * 连接超时 */HttpConnectionParams.setConnectionTimeout(params, 2000);/** * 请求超时 */HttpConnectionParams.setSoTimeout(params, 4000);// 设置支持http和https两种模式SchemeRegistry schgty = new SchemeRegistry();schgty.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));schgty.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));// 使用线程安全的连接管理来创建HTTPClient 重要，否则在多线程中调用HttpClient程序会报错崩溃ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(params, schgty);customerHttpClient = new DefaultHttpClient(connectionManager,params);}return customerHttpClient;}}

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