今天用Java类里自带的编码解码做了 一个加密解密器。其实我没做什么就是做了个界面。
还有key是固定八个字符，我改成不是八个字符也可以了。
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Encrypt extends JFrame{
private static final long serialVersionUID = 1L;
JLabel lb1 = new JLabel("原文:");
JTextArea txt = new JTextArea(8,35);
JScrollPane jsTxt = new JScrollPane(txt);
JLabel lb = new JLabel("KEY:");
JTextField pwd = new JTextField(10);
JButton encry = new JButton("加密");
JButton decry = new JButton("解密");
JLabel lb2 = new JLabel("加/解密后:");
JTextArea showArea = new JTextArea(8,35);
JScrollPane jsShowArea = new JScrollPane(showArea);
public Encrypt(String title) throws HeadlessException {
super(title);
}
public static void main(String[] args) {
new Encrypt("Encrypt").start();
}
public void start(){
JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
JPanel leftPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
JPanel rightPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
JPanel downPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
BorderLayout layout = new BorderLayout(5,5);
this.setLayout(layout);
this.setSize(400, 395);
topPanel.add(lb1);
topPanel.add(jsTxt);
this.add("North", topPanel);
leftPanel.add(lb);
leftPanel.add(pwd);
this.add("West", leftPanel);
rightPanel.add(encry);
encry.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(txt.getText().length()==0){
JOptionPane.showMessageDialog(null, "加密内容不能为空", "提示", JOptionPane.INFORMATION_MESSAGE);
return ;
}
showArea.setText(encrypt(txt.getText(),pwd.getText()));
}
});
rightPanel.add(decry);
decry.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(txt.getText().length()==0){
JOptionPane.showMessageDialog(null, "解密内容不能为空", "提示", JOptionPane.INFORMATION_MESSAGE);
return ;
}
showArea.setText(decrypt(txt.getText(),pwd.getText()));
}
});
this.add("East", rightPanel);
downPanel.add(lb2);
downPanel.add(jsShowArea);
this.add("South", downPanel);
this.setResizable(false);
this.setVisible(true);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
/**
* 加密逻辑方法
* @param message
* @param key
* @return
* @throws Exception
*/
private static byte[] encryptProcess(String message, String key) throws Exception {
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
return cipher.doFinal(message.getBytes("UTF-8"));
}
/**
* 解密逻辑方法
* @param message
* @param key
* @return
* @throws Exception
*/
private static String decryptProcess(String message,String key) throws Exception {
byte[] bytesrc =convertHexString(message);
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
byte[] retByte = cipher.doFinal(bytesrc);
return new String(retByte);
}
/**
* 16进制数组数转化
* @param ss
* @return
*/
private static byte[] convertHexString(String ss) throws Exception {
byte digest[] = new byte[ss.length() / 2];
for(int i = 0; i < digest.length; i++)
{
String byteString = ss.substring(2 * i, 2 * i + 2);
int byteValue = Integer.parseInt(byteString, 16);
digest[i] = (byte)byteValue;
}
return digest;
}
/**
* 十六进制数转化
* @param b
* @return
* @throws Exception
*/
private static String toHexString(byte b[]) throws Exception {
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < b.length; i++) {
String plainText = Integer.toHexString(0xff & b[i]);
if (plainText.length() < 2)
plainText = "0" + plainText;
hexString.append(plainText);
}
return hexString.toString();
}
private static String fixKey(String key){
if(key.length()>8){
key = key.substring(0, 8);
}else{
while(key.length()<8){
key+='0';
}
}
return key;
}
/**
* 加密方法
*/
public static String encrypt(String message,String key){
String enStr = null;
if(key.length()!=8){
key = fixKey(key);
}
System.out.println(key+"......"+key.length());
try {
String orignStr=java.net.URLEncoder.encode(message, "utf-8");
enStr=toHexString(encryptProcess(orignStr, key));
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "加密参数异常！", "错误", JOptionPane.OK_OPTION);
}
return enStr;
}
/**
* 解密方法
*/
public static String decrypt(String message,String key){
String decStr = null;
if(key.length()!=8){
key = fixKey(key);
}
System.out.println(key+"......"+key.length());
try {
decStr = java.net.URLDecoder.decode(decryptProcess(message,key), "utf-8") ;
}catch (Exception e) {
JOptionPane.showMessageDialog(null, "解密参数异常！", "错误", JOptionPane.OK_OPTION);
}
return decStr;
}
}
原文地址：http://blog.csdn.net/u012685794/article/details/45816163
