用JSP抓取网址

import java.io.*;
import java.net.*;
import java.util.*;
class url2htm{
static private url2htm instance; // Create the only instance of the class
public static String strURL=""; // Announce the universial variable to mark the destination URL
public static String strFile=""; // Announce the universial variable to mark the local file path
/**
* Construct the private function to prevent other
* Application from creating the instance of this class
*/
private url2htm(){
init();
}
/**
* The main function that will invoke the application
*/
public static void main(String args[]){
url2htm instUrl2htm = new url2htm(); // Create the instance of the default class
instUrl2htm.write(); // Invoke the chief function
}
/**
* The setProperties() function will set the two major
* variables to the class
* @para propNames
* @para name
*/
private void setProperties(Properties props){
Enumeration propNames = props.propertyNames();
while(propNames.hasMoreElements()){
String name = (String) propNames.nextElement();
if(name.endsWith(".url")){
String webName = name.substring(0,name.lastIndexOf("."));
strURL = props.getProperty(webName + ".url");
strFile = props.getProperty(webName + ".file");
}
}
}
/**
* The getURL() function will return the URL string
*/
private void getURL(){
System.out.println(strURL);
}
/**
* The getFile() function will return the local file and path
*/
private void getFile(){
System.out.println(strFile);
}
/**
* The write() function will read the dest URL as input stream and
* Write into a local file
* @para fileline
* @para url
*/
private static void write(){
String fileline;
String url = strURL;
try {
URL destURL = new URL(url);