Java read-in URL data

Reproduced:

The OpenStream () method in the URL class, which can read a resource specified by a URL object, returns a InputStream object.   (1) File Protocol Introduction The file protocol is primarily used to access files on the local computer, just as you would open a file in Windows Explorer. To use the file protocol, the basic format is as follows: file:///file path (or file://localhost, but not file://native IP), For example, to open the 1.swf file in the Flash folder of the F drive, you can type: file:///f:/flash/1.swf and enter in the Explorer or IE Address bar. (2) URL data read in (read local data) public class readfromurl{@SuppressWarnings ("deprecation") public static void main (string[] args) {UR  L Root=null;  URL Url=null;  String readString;  DataInputStream dis; try {root=new URL (file://localhost/d:/javaUrlTest/),//root address, total folder url=new URL (root,args[0]),//URL System for a file in the folder.      Out.println ("URL" +url); Dis=new DataInputStream (Url.openstream ());//Get Data input stream while ((Readstring=dis.readline ())!=null) {System.out.println (   "ReadString:" +readstring);   } System.out.println ("file read");  Dis.close ();  } catch (Malformedurlexception e) {//TODO auto-generated catch block E.printstacktrace ();  }catch (IOException e) {System.out.println ("IO exception:" + E); }}} run the code and enter the name of the file to be read in the console. Run As--run CoNfigurations because the ReadLine () method in the DataInputStream class is no longer used in the new version, the code is changed to public class Readfromurl {@SuppressWarnings ("  Deprecation ") public static void main (string[] args) {URL root=null;  URL Url=null;  String readString;  DataInputStream dis;  BufferedReader BR;   try {root=new URL (file://localhost/d:/javaUrlTest/);   Url=new URL (root,args[0]);      System.out.println ("URL" +url);   Dis=new DataInputStream (Url.openstream ());   Br=new BufferedReader (New InputStreamReader (Url.openstream ()));   while ((Readstring=br.readline ())!=null) {System.out.println ("readString:" +readstring);   } System.out.println ("file read");  Dis.close ();  } catch (Malformedurlexception e) {//TODO auto-generated catch block E.printstacktrace ();  }catch (IOException e) {System.out.println ("IO exception:" + E); } }}

　　

Java read-in URL data