The URL is a string that describes how to locate resources on the Internet. A complete programmer can easily use the URL
Internet communication on the Internet
A complete URL consists of a protocol, host name, port number, file name, and reference. example
http://tech.china.com:80/1_cn/news/index.html
It uses the HTTP protocol and uses port 80 to connect to the host Teach.China.com to access file /zh_cn/news/index.html
The URL class in Java represents various URLs, the following is a constructor
URL (String Spec)
URL (String Protocol, String Host, Int Port, String File)
URL (String Protocol, String Host, Int Port, String File, URLStreamHandler Handler)
String Protocol, String Host, String File
URL (URL CONTEXT, STRING SPEC)
URL (URL Context, String Spec, UrlstreamHandler Handler)
Parameter Description
Context explanates SPEC when spec for relative URL
Handler Specifies the processor of the context
Host host name
File file path name
Port number to use
Protocol's protocol to use
SPEC URL string
Use the URL class to get the URL component (protocol, host number, port number, file name, reference), in addition, it also provides acquiring URL
Representative resources
Main method of URL
Object getContent () // Get the content indicated by this URL
String getfile () // Get the file name of the URL
String gethost () // Get the host number of the URL
INT getport () // Get the port number of the URL
String getProtocol () // Get the protocol of this URL
String getQuery () // Get the Query section of this URL
String getUserInfo () / / User information for this URL
UrlConnection OpenConnection () // Open the connection indicated by the URL
InputStream OpenStream () // Open the input stream of this URL
Booleam Samefile (URL OTHER) / / Decades whether the two URL points to the same file
Void Set (String Protocol, String Host, Int Port, String File, String REF) // Setting this URL domain
String TOEXTERNALMM () // Returns the string of the URL
