Java网络编程知识点（1）

ByteArrayInputStream inputStream = new ByteArrayInputStream(str.getBytes());

String baseURL = "http://sixweather.3gpk.net/SixWeather.aspx?city=%s";
String cityName = "武汉";

String resultURL = String.format(baseURL, cityName);

// **************访问网络，获取天气预报数据，将结果数据存储到result中*******************
//初始化httpGet，将参数url传给它
HttpGet httpGet = new HttpGet(url);

String result = "";

//初始化httpClient
HttpClient httpClient = new DefaultHttpClient();

//调用httpClient的execute方法，返回一个HttpResponse的实例
HttpResponse httpResponse = httpClient.execute(httpGet);

if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
//将httpResponse中的天气数据转换成字符串形式
result = EntityUtils.toString(httpResponse.getEntity());
}

// ****************************************************************************************

String cityName = "武汉";

try {
//对cityName进行utf-8编码操作
cityName = URLEncoder.encode(cityName, "utf-8");

//对cityName进行utf-8解码操作
cityName = URLDecoder.decode(cityName, "utf-8");

} catch (Exception e) {
e.printStackTrace();
}