这里面包含了一百多个JAVA源文件

				The matching routines in java.util.regex require that the input be a CharSequence object. This example implements a method that efficiently returns the contents of a file in a CharSequence object. 
				    // Converts the contents of a file into a CharSequence
				    // suitable for use by the regex package.
				    public CharSequence fromFile(String filename) throws IOException {
				        FileInputStream fis = new FileInputStream(filename);
				        FileChannel fc = fis.getChannel();
				    
				        // Create a read-only CharBuffer on the file
				        ByteBuffer bbuf = fc.map(FileChannel.MapMode.READ_ONLY, 0, (int)fc.size());
				        CharBuffer cbuf = Charset.forName("8859_1").newDecoder().decode(bbuf);
				        return cbuf;
				    }
				
				Here is sample code that uses the method: 
				    try {
				        // Create matcher on file
				        Pattern pattern = Pattern.compile("pattern");
				        Matcher matcher = pattern.matcher(fromFile("infile.txt"));
				    
				        // Find all matches
				        while (matcher.find()) {
				            // Get the matching string
				            String match = matcher.group();
				        }
				    } catch (IOException e) {
				    }