123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172 |
-
- /* ====================================================================
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You under the Apache License, Version 2.0
- (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- ==================================================================== */
-
-
-
- package org.apache.poi.hssf.view;
-
- import java.awt.*;
- import java.awt.event.*;
- import java.net.*;
- import java.io.*;
- import javax.swing.*;
-
- import org.apache.poi.hssf.usermodel.HSSFWorkbook;
-
- /**
- * Sheet Viewer - Views XLS files via HSSF. Can be used as an applet with
- * filename="" or as a applications (pass the filename as the first parameter).
- * Or you can pass it a URL in a "url" parameter when run as an applet or just
- * that first parameter must start with http:// and it will guess its a url. I
- * only tested it as an applet though, so it probably won't work...you fix it.
- *
- * @author Andrew C. Oliver
- * @author Jason Height
- */
- public class SViewer extends JApplet {
- private SViewerPanel panel;
- boolean isStandalone = false;
- String filename = null;
-
- /**Get a parameter value*/
- public String getParameter(String key, String def) {
- return isStandalone ? System.getProperty(key, def) :
- (getParameter(key) != null ? getParameter(key) : def);
- }
-
- /**Construct the applet*/
- public SViewer() {
- }
-
- /**Initialize the applet*/
- public void init() {
- try {
- jbInit();
- }
- catch(Exception e) {
- e.printStackTrace();
- System.exit(1);
- }
- }
-
- /**Component initialization*/
- private void jbInit() throws Exception {
- InputStream i = null;
- boolean isurl = false;
- if (filename == null) filename = getParameter("filename");
-
- if (filename == null || filename.substring(0,7).equals("http://")) {
- isurl = true;
- if (filename == null) filename = getParameter("url");
- i = getXLSFromURL(filename);
- }
-
- HSSFWorkbook wb = null;
- if (isurl) {
- wb = constructWorkbook(i);
- } else {
- wb = constructWorkbook(filename);
- }
- panel = new SViewerPanel(wb, false);
- getContentPane().setLayout(new BorderLayout());
- getContentPane().add(panel, BorderLayout.CENTER);
- }
-
- private HSSFWorkbook constructWorkbook(String filename) throws FileNotFoundException, IOException {
- HSSFWorkbook wb = null;
- FileInputStream in = new FileInputStream(filename);
- wb = new HSSFWorkbook(in);
- in.close();
- return wb;
- }
-
- private HSSFWorkbook constructWorkbook(InputStream in) throws IOException {
- HSSFWorkbook wb = null;
-
- wb = new HSSFWorkbook(in);
- in.close();
- return wb;
- }
-
- /**Start the applet*/
- public void start() {
- }
- /**Stop the applet*/
- public void stop() {
- }
- /**Destroy the applet*/
- public void destroy() {
- }
- /**Get Applet information*/
- public String getAppletInfo() {
- return "Applet Information";
- }
- /**Get parameter info*/
- public String[][] getParameterInfo() {
- return null;
- }
-
- /**
- * opens a url and returns an inputstream
- *
- */
- private InputStream getXLSFromURL(String urlstring) throws MalformedURLException, IOException {
- URL url = new URL(urlstring);
- URLConnection uc = url.openConnection();
- String field = uc.getHeaderField(0);
- for (int i=0;field != null; i++) {
- System.out.println(field);
- field = uc.getHeaderField(i);
- }
- BufferedInputStream is = new BufferedInputStream(uc.getInputStream());
- return is;
- }
-
-
- /**Main method*/
- public static void main(String[] args) {
- if(args.length < 1) {
- throw new IllegalArgumentException("A filename to view must be supplied as the first argument, but none was given");
- }
-
- SViewer applet = new SViewer();
- applet.isStandalone = true;
- applet.filename = args[0];
- Frame frame;
- frame = new Frame() {
- protected void processWindowEvent(WindowEvent e) {
- super.processWindowEvent(e);
- if (e.getID() == WindowEvent.WINDOW_CLOSING) {
- System.exit(0);
- }
- }
- public synchronized void setTitle(String title) {
- super.setTitle(title);
- enableEvents(AWTEvent.WINDOW_EVENT_MASK);
- }
- };
- frame.setTitle("Applet Frame");
- frame.add(applet, BorderLayout.CENTER);
- applet.init();
- applet.start();
- frame.setSize(400,320);
- Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
- frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
- frame.setVisible(true);
- }
- }
|