public class HttpGetUtil {

	// 用get请求获取输入流
	public static InputStream getInputStream() {
		InputStream inputStream = null;
		HttpURLConnection httpURLConnection = null;
		try {
			URL url = new URL("http://www.baidu.com/img/bd_logo1.png");
			if (url != null) {
				httpURLConnection = (HttpURLConnection) url.openConnection();
				// 设置连接网络的超时时间
				httpURLConnection.setConnectTimeout(3000);
				// 打开输入流
				httpURLConnection.setDoInput(true);
				// 使用GET方法请求
				httpURLConnection.setRequestMethod("GET");
				// 获取结果响应码
				int responseCode = httpURLConnection.getResponseCode();
				if (responseCode == 200) {
					inputStream = httpURLConnection.getInputStream();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return inputStream;
	}

	// 将输入流存在本地
	public void saveImageToDisk() {
		InputStream inputStream = getInputStream();
		byte[] data = http://www.mamicode.com/new byte[1024];>


public class HttpPostUtil {
	private static URL url;

	// 用post请求获取输入流
	public static String sendPostMessage(Map<String, String> params, String encode) {
		// 初始化
		StringBuffer buffer = new StringBuffer();
		buffer.append("?");
		try {
			if (params != null && !params.isEmpty()) {
				for (Map.Entry<String, String> entry : params.entrySet()) {
					// 完成转码
					buffer.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), encode))
							.append("&");
				}
				// 删掉最后一个&
				buffer.deleteCharAt(buffer.length() - 1);
			}

			HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
			urlConnection.setConnectTimeout(3000);
			urlConnection.setRequestMethod("POST");
			urlConnection.setDoInput(true);// 从服务器获取数据
			urlConnection.setDoOutput(true);// 向服务器写数据
			// 获得上传信息的字节大小以及长度
			byte[] mydata = http://www.mamicode.com/buffer.toString().getBytes();>


Http访问网络之GET和POST