📄 txt2html.java

📁 一个java写的加密算法
💻 JAVA
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/* * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved. * Use is subject to license terms. *//** * Copyright (c) 1999 The Apache Software Foundation.  All rights  * reserved. */package samples.webapps.simple.ant.task;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;import java.util.Iterator;import java.util.LinkedList;import java.util.List;import org.apache.tools.ant.BuildException;import org.apache.tools.ant.DirectoryScanner;import org.apache.tools.ant.Project;import org.apache.tools.ant.Task;import org.apache.tools.ant.types.FileSet;/** * Ant task to convert a given set of files from Text to HTML. * Inserts an HTML header including pre tags and replaces special characters * with their HTML escaped equivalents. * * <p>This task is currently used by the ant script to build our examples</p> * * @author Mark Roth */public class Txt2Html     extends Task {        /** The directory to contain the resulting files */    private File todir;        /** The file to be converted into HTML */    private List filesets = new LinkedList();        /**     * Sets the directory to contain the resulting files     *     * @param todir The directory     */    public void setTodir( File todir ) {        this.todir = todir;    }        /**     * Sets the files to be converted into HTML     *     * @param fs The fileset to be converted.     */    public void addFileset( FileSet fs ) {        filesets.add( fs );    }        /**     * Perform the conversion     *     * BuildException Thrown if an error occurs during execution of     *    this task.     */    public void execute()         throws BuildException     {        int count = 0;                // Step through each file and convert.        Iterator iter = filesets.iterator();        while( iter.hasNext() ) {            FileSet fs = (FileSet)iter.next();            DirectoryScanner ds = fs.getDirectoryScanner( project );            File basedir = ds.getBasedir();            String[] files = ds.getIncludedFiles();            for( int i = 0; i < files.length; i++ ) {                File from = new File( basedir, files[i] );                File to = new File( todir, files[i] + ".html" );                if( !to.exists() ||                     (from.lastModified() > to.lastModified()) )                 {                    log( "Converting file '" + from.getAbsolutePath() +                         "' to '" + to.getAbsolutePath(), Project.MSG_VERBOSE );                    try {                        convert( from, to );                    }                    catch( IOException e ) {                        throw new BuildException( "Could not convert '" +                             from.getAbsolutePath() + "' to '" +                             to.getAbsolutePath() + "'", e );                    }                    count++;                }            }            if( count > 0 ) {                log( "Converted " + count + " file" + (count > 1 ? "s" : "") +                     " to " + todir.getAbsolutePath() );            }        }    }        /**     * Perform the actual copy and conversion     *     * @param from The input file     * @param to The output file     * @throws IOException Thrown if an error occurs during the conversion     */    private void convert( File from, File to )        throws IOException    {        // Open files:        BufferedReader in = new BufferedReader( new FileReader( from ) );        PrintWriter out = new PrintWriter( new FileWriter( to ) );                // Output header:        out.println( "<html><body><pre>" );                // Convert, line-by-line:        String line;        while( (line = in.readLine()) != null ) {            StringBuffer result = new StringBuffer();            int len = line.length();            for( int i = 0; i < len; i++ ) {                char c = line.charAt( i );                switch( c ) {                    case '&':                        result.append( "&amp;" );                        break;                    case '<':                        result.append( "&lt;" );                        break;                    default:                        result.append( c );                }            }            out.println( result.toString() );        }                // Output footer:        out.println( "</pre></body></html>" );                // Close streams:        out.close();        in.close();    }    }
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