Android网络连接二——HttpURLConnection

? ? HttpURLConnection类是URL代表的网络资源与应用程序的连接。应用程序通过HttpURLConnection对象向服务器发送，读取URL指定的网络资源。

? ? 使用步骤：

? ?1、创建URL对象

? ?2、通过url.openConnection()方法创建URLConnection对象

? ?3、设置URLConnection的参数和普通请求属性

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		//1、创建URL对象			URL url = new URL("http://192.168.70.113:8008/upload/uploadAction.do");			//2、获得HttpUrlConnection对象			HttpURLConnection httpURLConnection = (HttpURLConnection) url					.openConnection();			//3、设置请求方法类型，注意：必须大写			httpURLConnection.setRequestMethod("POST");			//4、设置参数属性			//向服务器发送请求数据			httpURLConnection.setDoOutput(true);			//获取服务器的返回数据			httpURLConnection.setDoInput(true);			//禁止httpURLConnection使用缓存			httpURLConnection.setUseCaches(false);			//			httpURLConnection.setRequestProperty("Connection", "Keep-Alive");			httpURLConnection.setRequestProperty("Charset", "UTF-8");			//设置实体消息的类型，"application/x-www-form-urlencoded" 表示实体类型的自定义表单//			httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");			//设置类型为上传图片			httpURLConnection.setRequestProperty("Content-Type",					"multipart/form-data;boundary=" + boundary);			//5、获取到服务端的输入输出流		        InputStream is = httpURLConnection.getInputStream();		        OutputStream out = httpURLConnection.getOutputStream();                        //6、关闭流                        is.close();out.close();

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附件为上传下载案例：

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