Android之用HTTP的get,post,HttpClient三种方式向service提交文本数据

客户端代码示例:

/**
 * HTTP请求
 * @author kesenhoo
 *
 */
public class HttpRequest 
{	
	public static boolean sendXML(String path, String xml)throws Exception
	{
		byte[] data = xml.getBytes();
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
		conn.setRequestMethod("POST");
		conn.setConnectTimeout(5 * 1000);
		//如果通过post提交数据，必须设置允许对外输出数据
		conn.setDoOutput(true);
		conn.setRequestProperty("Content-Type", "text/xml; charset=UTF-8");
		conn.setRequestProperty("Content-Length", String.valueOf(data.length));
		OutputStream outStream = conn.getOutputStream();
		outStream.write(data);
		outStream.flush();
		outStream.close();
		if(conn.getResponseCode()==200)
		{
			return true;
		}
		return false;
	}
	/**
	 * 通过get方式提交参数给服务器
	 * @param path
	 * @param params
	 * @param enc
	 * @return
	 * @throws Exception
	 */
	public static boolean sendGetRequest(String path, Map<String, String> params, String enc) throws Exception
	{
		//构造如下形式的字符串，这里的字符串依情况不同
		// ?method=save&title=435435435&timelength=89&		
		//使用StringBuilder对象
		StringBuilder sb = new StringBuilder(path);
		sb.append('?');		
		//迭代Map
		for(Map.Entry<String, String> entry : params.entrySet())
		{
			sb.append(entry.getKey()).append('=')
				.append(URLEncoder.encode(entry.getValue(), enc)).append('&');
		}
		sb.deleteCharAt(sb.length()-1);
		//打开链接
		URL url = new URL(sb.toString());
		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(5 * 1000);
		//如果请求响应码是200，则表示成功
		if(conn.getResponseCode()==200)
		{
			return true;
		}
		return false;
	}
	
	/**
	 * 通过Post方式提交参数给服务器
	 * @param path
	 * @param params
	 * @param enc
	 * @return
	 * @throws Exception
	 */
	public static boolean sendPostRequest(String path, Map<String, String> params, String enc) throws Exception
	{
		//需要构造的字符串形式如下：
		// title=dsfdsf&timelength=23&method=save
		StringBuilder sb = new StringBuilder();
		//如果参数不为空
		if(params!=null && !params.isEmpty())
		{
			for(Map.Entry<String, String> entry : params.entrySet())
			{
				//Post方式提交参数的话，不能省略内容类型与长度
				sb.append(entry.getKey()).append('=')
					.append(URLEncoder.encode(entry.getValue(), enc)).append('&');
			}
			sb.deleteCharAt(sb.length()-1);
		}
		//得到实体的二进制数据
		byte[] entitydata = sb.toString().getBytes();
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
		conn.setRequestMethod("POST");
		conn.setConnectTimeout(5 * 1000);
		//如果通过post提交数据，必须设置允许对外输出数据
		conn.setDoOutput(true);
		//这里只设置内容类型与内容长度的头字段
		//内容类型Content-Type: application/x-www-form-urlencoded
		//内容长度Content-Length: 38
		conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
		conn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));
		OutputStream outStream = conn.getOutputStream();
		//把实体数据写入是输出流
		outStream.write(entitydata);
		//内存中的数据刷入
		outStream.flush();
		outStream.close();
		//如果请求响应码是200，则表示成功
		if(conn.getResponseCode()==200)
		{
			return true;
		}
		return false;
	}
	
	/**
	 * 在遇上HTTPS安全模式或者操作cookie的时候使用HTTPclient会方便很多
	 * 使用HTTPClient（开源项目）向服务器提交参数
	 * @param path
	 * @param params
	 * @param enc
	 * @return
	 * @throws Exception
	 */
	public static boolean sendRequestFromHttpClient(String path, Map<String, String> params, String enc) throws Exception
	{
		//需要把参数放到NameValuePair
		List<NameValuePair> paramPairs = new ArrayList<NameValuePair>();
		if(params!=null && !params.isEmpty())
		{
			for(Map.Entry<String, String> entry : params.entrySet())
			{
				paramPairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
			}
		}
		//对请求参数进行编码，得到实体数据
		UrlEncodedFormEntity entitydata = new UrlEncodedFormEntity(paramPairs, enc);
		//构造一个请求路径
		HttpPost post = new HttpPost(path); 
		//设置请求实体
		post.setEntity(entitydata);
		//浏览器对象
		DefaultHttpClient client = new DefaultHttpClient(); 
		//执行post请求
		HttpResponse response = client.execute(post);
		//从状态行中获取状态码，判断响应码是否符合要求
		if(response.getStatusLine().getStatusCode()==200)
		{
			return true;
		}
		return false;
	}
}