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一旦拥有了URI对象,你就可以通过调用getAuthority()、getFragment()、getHost()、getPath()、getPort()、getQuery()、getScheme()、getSchemeSpecificPart()和 getUserInfo()方法提取多种组件。你也可以通过调用isAbsolute()确定该URI是绝对的还是相对的,通过调用isOpaque()确定该URI是不透明的还是分层的。如果返回值是true意味着该URI是绝对的或不透明的,如果返回值是false意味着该URI是相对的或分层的。 列表1中的程序用命令行参数建立了一个URI对象,调用URI组件提取方法来检索URI的组件,并调用URI的isAbsolute()和isOpaque()方法把该URI分类为绝对的/相对性和不透明的/分层的。 列表1: URIDemo1.java// URIDemo1.javaimport java.net.*;class URIDemo1{ public static void main (String [] args) throws Exception{ if (args.length != 1){ System.err.println ("usage: java URIDemo1 uri");return;}URI uri = new URI (args [0]);System.out.println ("Authority = " +uri.getAuthority ());System.out.println ("Fragment = " +uri.getFragment ());System.out.println ("Host = " +uri.getHost ());System.out.println ("Path = " +uri.getPath ());System.out.println ("Port = " +uri.getPort ());System.out.println ("Query = " +uri.getQuery ());System.out.println ("Scheme = " +uri.getScheme ());System.out.println ("Scheme-specific part = " +uri.getSchemeSpecificPart ());System.out.println ("User Info = " +uri.getUserInfo ());System.out.println ("URI is absolute: " +uri.isAbsolute ());System.out.println ("URI is opaque: " +uri.isOpaque ());}} |
query://jeff@books.com:9000/public/manuals/appliances?stove#ge:Authority = jeff@books.com:9000Fragment = geHost = books.comPath = /public/manuals/appliancesPort = 9000Query = stoveScheme = query//jeff@books.com:9000/public/manuals/appliances?stoveUser Info = jeffURI is absolute: trueURI is opaque: false |
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