java發送http head請求

　　public static void main(String[] args) throws Exception {

　　URL url = new URL();

　　HttpURLConnection conn = (HttpURLConnection) urlopenConnection();

　　// connsetDoOutput(true);

　　connsetRequestMethod(HEAD);

　　Map<String List<String>> headerMap = conngetHeaderFields();

　　Iterator<String> iterator = headerMapkeySet(erator();

　　while (iteratorhasNext()) {

　　String key = iteratornext();

　　List<String> values = headerMapget(key);

　　Systemoutprintln(key + : + valuestoString());

　　}

　　}

　　返回結果

　　Java代碼

　　null:[HTTP/ OK]

　　ETag:[]

　　Date:[Thu Feb :: GMT]

　　ContentLength:[]

　　LastModified:[Thu Jan :: GMT]

　　ContentType:[text/html]

　　AcceptRanges:[bytes]

　　Server:[lig]

From:http://tw.wingwit.com/Article/program/Java/hx/201311/26747.html