DES文件加密 java

import java.awt.Component; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.Collections; import javax.imageio.ImageIO; import javax.swing.JFileChooser; import javax.swing.JOptionPane; import javax.swing.filechooser.FileNameExtensionFilter; import org.omg.CORBA.portable.InputStream; /** * 监听器 * 主函数入口 * @author :李晓君 * */ public class Listener implements ActionListener{ private DES des = new DES("65496"); // des.setKey("567"); Client c = new Client(); /** * 主函数入口处 * @param args */ public static void main(String[] args){ new Listener(); //DES des = new DES(); // 设置密钥 // String str1 = "haha"; //DES加密 // String str2 = des.getEncString(str1); // String deStr = des.getDesString(str2); //System.out.println("密文:" + str2); //DES解密 //System.out.println("明文:" + deStr); } public Listener() { c.getbubble().addActionListener(this); c.getquick().addActionListener(this); c.getRead().addActionListener(this); c.getSave().addActionListener(this); } @Override public void actionPerformed(ActionEvent e) { byte[] t = c.getsource().getText().getBytes();//得到排序内容 //byte[] q = c.getsource().getText().getBytes(); //Byte[] //Collections.addAll(list,t); /** * 加密 */ if(e.getSource().equals(c.getbubble())){ if("".equals(c.getsource().getText())){ JOptionPane.showMessageDialog(null,"没有可以加密的字符串！"); c.getresult().setText(""); }else{ byte[] encode=des.getEncCode(t); } } /** * 解密 */ if(e.getSource().equals(c.getquick())){ if("".equals(c.getsource().getText())){ JOptionPane.showMessageDialog(null,"没有可以加密的字符串！"); c.getresult().setText(""); }else{ byte[] encode=des.getDesCode(t); c.getresult().setText(""+encode); } } /** * 读取文件，读取文件类型为.txt * fileChooser：文件选择器 * filter：文件过滤器 */ if(e.getSource().equals(c.getRead())){ JFileChooser fileChooser = new JFileChooser(); String readFormats[] = ImageIO.getReaderFormatNames(); //BufferedImage bi = ImageIO.read(f); //FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文件(.JPG)","JPG"); //fileChooser.setFileFilter((javax.swing.filechooser.FileFilter) filter); int i = fileChooser.showOpenDialog(getContentPane());//打开文件选择对话框 if(i == JFileChooser.APPROVE_OPTION){//当按下打开按钮时读取文件中的文件 //File selectedFile = fileChooser.getSelectedFile(); c.getname().setText(fileChooser.getSelectedFile().getPath());//得到文件路径 //File file = new File(selectedFile.getAbsolutePath()); String extensionName = getExtensionName(c.getname().getText());//获取文件后缀名 //if ("txt".equals(extensionName)) { String text = readTxt(c.getname().getText()); c.getsource().setText(text); //} //else{ // JOptionPane.showMessageDialog(null, "请选择txt格式的文件！"); //} } } /** * 储存排序后的字符串 * 若无排序结果则会有相应提示 */ int len = c.getresult().getText().length();//获取排序结果中的值的长度 if(len==0&&e.getSource().equals(c.getSave())){ JOptionPane.showMessageDialog(null,"请先进行排序再储存！"); } else{ if(e.getSource().equals(c.getSave())){ //FileNameExtensionFilter filter=new FileNameExtensionFilter("*.txt","JPG"); JFileChooser fileChooser = new JFileChooser(); //fileChooser.showSaveDialog(null); //fileChooser.setFileFilter(filter); //fileChooser.setMultiSelectionEnabled(false); int i=fileChooser.showSaveDialog(null); if(i == JFileChooser.APPROVE_OPTION){ File file=fileChooser.getSelectedFile(); if (!file.getPath().endsWith(".jpg")) { file=new File(file.getPath()+".jpg"); } FileOutputStream fos=null; try { if (!file.exists()) {//文件不存在 则创建一个 file.createNewFile(); } else{ fos=new FileOutputStream(file); String contend = c.getresult().getText().substring(0,len); fos.write(contend.getBytes()); fos.flush(); JOptionPane.showMessageDialog(null,"存储成功！"); } }catch (IOException e1) { System.err.println("文件创建失败："); e1.printStackTrace(); } } } } } private Component getContentPane() { // TODO Auto-generated method stub return null; } /** * 判断字符串中是否为合法字符 * @param str * @return */ boolean isLetter(String str){ return str.matches("^[A-Za-z]+$"); } boolean isNum(String str){ return str.matches("^[-+]?(([0-9]+)([.]([0-9]+))?|([.]([0-9]+))?)$"); } /** * 获取文件名 * @param filename * @return */ private String getExtensionName(String filename) { if ((filename != null) && (filename.length() > 0)) { int dot = filename.lastIndexOf('.'); if ((dot > -1) && (dot < (filename.length() - 1))) { return filename.substring(dot + 1); } } return filename; } /** * 读取文件操作 */ private String readTxt(String path) { if (path == null || "".equals(path)) { return ""; } StringBuffer sb = new StringBuffer(); File file = new File(path); InputStreamReader read = null; BufferedReader reader = null; try { //BufferedImage bi = ImageIO.read(file); read = new InputStreamReader(new FileInputStream(file), "gb2312");//字节流转变为字符流 reader = new BufferedReader(read);//读入缓存中 // BufferedImage bi = ImageIO.read(file); String line; while ((line = reader.readLine()) != null) { sb.append(line); //bi.append(line); } //while ((line = bi.readLine())!=null){ } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (read != null) { try { read.close(); } catch (IOException e) { e.printStackTrace(); } } if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return sb.toString(); } }