java 访问http

public static String getURLContent(String urlStr) {
/** 网络的url地址 */
URL url = null;
/** http连接 */
HttpURLConnection httpConn = null;
/**//** 输入流 */
BufferedReader in = null;
StringBuffer sb = new StringBuffer();
try{
url = new URL(urlStr);
in = new BufferedReader( new InputStreamReader(url.openStream(),"UTF-8") );
String str = null;
while((str = in.readLine()) != null) {
sb.append( str );
}
} catch (Exception ex) {

} finally{
try{
if(in!=null) {
in.close();
}
}catch(IOException ex) {
}
}
String result =sb.toString();

return result;
}