import java.lang.String; import java.util.StringTokenizer; import java.util.Hashtable; import java.io.*; /* A Java program to extract a directory entry from a faculty database, based upon first and last names Program assumes the directory is located in /home/walker/pubic_html/cgi-bin/math-cs-faculty-98-alt */ public class facDirJavaAlt { static String directoryName = "/home/walker/public_html/cgi-bin/math-cs-faculty-98-alt"; static int maxNames = 20; static String directoryArray [][] = new String [maxNames][6]; /* directoryArray[i] will give the ith array entry, as an array directoryArray[i][0] will be the first name directoryArray[i][1] will be the last name directoryArray[i][2] will be the person's title directoryArray[i][3] will be the e-mail address directoryArray[i][4] will be the telephone numberr directoryArray[i][5] will be the office number */ public static void printWebPageHeader () throws Exception { /* prints an html page header */ System.out.println("Content-type: text/html"); System.out.println(); System.out.println(""); System.out.println(""); System.out.println(""); System.out.println(""); System.out.println(""); System.out.println("Directory Search"); System.out.println(""); System.out.println(""); System.out.println(""); } public static void printWebPageFooter () throws Exception { /* prints an html page footer */ System.out.println(""); System.out.println(""); } public static void main(String[] args) throws Exception { /********************** html/browser header ************************/ int dirSize = 0; printWebPageHeader (); /******************************************************************* * load directory array of names and telephone numbers from file */ /* open directory file */ FileReader freader = new FileReader(directoryName); /* convert input stream to an DataInputStream */ BufferedReader in = new BufferedReader(freader); try { /* first two lines of data file contain header information */ in.readLine(); in.readLine(); /* read successive lines and put into directoryArray */ while (in.ready()) { String line = in.readLine(); /* split line into fields by scanning for commas */ int fieldIndex = 0; int firstPos = 0; int secondPos = line.indexOf(","); /* scan to locate first name, last name, title, e-mail, phone, office */ while (secondPos >= 0) { directoryArray[dirSize][fieldIndex] = line.substring(firstPos, secondPos); firstPos = secondPos + 1; secondPos = line.indexOf(",", firstPos); fieldIndex++; } directoryArray[dirSize][fieldIndex] = line.substring(firstPos); dirSize++; } } catch (Exception e) { System.out.println ("
File input error
"); } in.close(); /******************************************************************* * process the form data, putting values into a Hashtable * args[0] contains the browser information as composite string * divide the query strings into name=value pieces */ StringTokenizer nameValue = new StringTokenizer (args[0], "&"); /* put name=value pieces into hash table for easy retrieval */ Hashtable queryElements=new Hashtable(); while (nameValue.hasMoreTokens()) { String pair = nameValue.nextToken(); int pos = pair.indexOf("="); queryElements.put(pair.substring(0, pos), pair.substring(pos+1)); } /******************************************************************* * search directoryArray for desired name */ System.out.println("
"); System.out.println ("

Search Results for Math/CS Faculty

"); System.out.println("
"); String firstname = queryElements.get("firstname"); String lastname = queryElements.get("lastname"); System.out.println ("Search for " + firstname + " " + lastname); for (int i = 0; i < dirSize; i++) {if (firstname.equalsIgnoreCase(directoryArray[i][0]) && lastname.equalsIgnoreCase(directoryArray[i][1])) { System.out.println("

Name: " + firstname + " " + lastname); System.out.println("

"); } } /********************** html/browser footer ************************/ printWebPageFooter(); } // main(String[]) } // facDirJavaAlt