HTTP和JDK中定义的HTTPS默认端口号？(Are HTTP and HTTPS default

我逛了一下追杀想看看端口80和443的任何位置定义为公共常数。 做这些在JDK中存在（或者在公共库，比如Apache的HttpClient）？

Answer 1:

看的Javadoc URL： http://docs.oracle.com/javase/8/docs/api/java/net/URL.html#getDefaultPort--

getDefaultPort()返回的端口给定的协议

URL url = new URL("http://blah.com");
int defaultPort = url.getDefaultPort();

Answer 2:

Apache的HttpClient的确实有他们作为整数常量：

• http://hc.apache.org/httpclient-3.x/apidocs/org/apache/commons/httpclient/HttpURL.html#DEFAULT_PORT
• http://hc.apache.org/httpclient-3.x/apidocs/org/apache/commons/httpclient/HttpsURL.html#DEFAULT_PORT

文章来源: Are HTTP and HTTPS default port numbers defined in the JDK?