[android] Http Post 请求

设置常量

/**
* 建立连接的超时值
*/
public static final int HTTP_CONNECTION_TIMEOUT = 6 * 1000;
/**
 * 读超时的超时值
*/
public static final int HTTP_READ_TIMEOUT = 25 * 1000;
public static final String UTF_8 = "UTF-8";

httpPostRequest 函数

 1 /**
* Http Post 请求
* 
* @param requestUrl
* 请求地址
* @param postJson
* 上传数据
* @return 如果请求失败返回null
* @throws IOException
*/
public static String httpPostRequest(String requestUrl, String postJson) throws IOException {
URL url = new URL(requestUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true); 
connection.setDoOutput(true);
connection.setUseCaches(false);
//设置连接超时时间
connection.setConnectTimeout(HTTP_CONNECTION_TIMEOUT);
//设置读超时的时间
connection.setReadTimeout(HTTP_READ_TIMEOUT);
connection.setRequestProperty("Charset", UTF_8);
connection.setRequestProperty("Connection", "keep-alive");
connection.setRequestProperty("Content-Type", "application/json");

connection.getOutputStream().write(postJson.getBytes());
connection.getOutputStream().flush();
connection.getOutputStream().close();

String data = null;
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream inputStream = connection.getInputStream();
data = new String(FileUtil.readStream(inputStream));
} else {
Log.d(TAG, "Post Response Code : " + connection.getResponseCode());
}
connection.disconnect();
return data;
}