httpclient(一)

java net包里的方式

		PrintWriter out = null;
		URL httpurl = new URL(url);

		HttpURLConnection httpConn = (HttpURLConnection) httpurl.openConnection();
		httpConn.setRequestMethod("POST");
		httpConn.setDoOutput(true);
		httpConn.setDoInput(true);

		out = new PrintWriter(httpConn.getOutputStream());
		out.print(xml);
		out.flush();
		out.close();
		Util.convertStreamToString(httpConn.getInputStream(), "GBK");

get方式

		HttpClient httpclient = new DefaultHttpClient();
		HttpGet request = new HttpGet();
		request.setURI(new URI(url));
		HttpResponse response = httpclient.execute(request);

post方式

		HttpPost httpRequset = new HttpPost(url);
		HttpEntity httpentity = new StringEntity(xml, "GBK");  
		httpRequset.setEntity(httpentity);
		HttpClient httpclient = new DefaultHttpClient();
		httpentity = httpclient.execute(httpRequset).getEntity();
		if (httpentity != null) {
			System.out.println(Util.convertStreamToString(httpentity.getContent(), "GBK"));
		}
		httpRequset.abort();

/**
	 * 
	 * @description 转化输入流为指定编码的字符串
	 * @throws UnsupportedEncodingException 
	 */
	public static String convertStreamToString(InputStream is, String charsetName)
			throws UnsupportedEncodingException {
		BufferedReader reader = new BufferedReader(new InputStreamReader(is,
				charsetName));
		StringBuilder sb = new StringBuilder();
		String line = null;
		try {
			while ((line = reader.readLine()) != null) {
				sb.append(line + "\n");
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				is.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return sb.toString();
	}

key-value键值对的post方式

        // HttpPost连接对象  
        HttpPost httpRequset = new HttpPost("http://10.0.2.2:8080/dem/");  
        // 使用NameValuePair来保存要传递的Post参数  
        List<NameValuePair> params = new ArrayList<NameValuePair>();  
        // 添加要传递的参数  
        params.add(new BasicNameValuePair("par", "asdf"));  
        try {  
            // 设置字符集  
            HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");  
            // 请求httpRequset  
            httpRequset.setEntity(httpentity);  
            // 取得HttpClient  
            HttpClient httpClient = new DefaultHttpClient();  
            // 取得HttpResponse  
            HttpResponse httpResponse = httpClient.execute(httpRequset);