原理
对于任意长度的明文，AES首先对其进行分组，每组的长度为128位。分组之后将分别对每个128位的明文分组进行加密。
对于每个128位长度的明文分组的加密过程如下：
（1）将128位AES明文分组放入状态矩阵中。
（2）AddRoundKey变换：对状态矩阵进行AddRoundKey变换，与膨胀后的密钥进行异或操作（密钥膨胀将在实验原理七中详细讨论）。
（3）10轮循环：AES对状态矩阵进行了10轮类似的子加密过程。前9轮子加密过程中，每一轮子加密过程包括4种不同的变换，而最后一轮只有3种变换，前9轮的子加密步骤如下：
- ● SubBytes变换：SubBytes变换是一个对状态矩阵非线性的变换；
- ● ShiftRows变换：ShiftRows变换对状态矩阵的行进行循环移位；
- ● MixColumns变换：MixColumns变换对状态矩阵的列进行变换；
- ● AddRoundKey变换：AddRoundKey变换对状态矩阵和膨胀后的密钥进行异或操作。
最后一轮的子加密步骤如下：
- ● SubBytes变换：SubBytes变换是一个对状态矩阵非线性的变换；
- ● ShiftRows变换：ShiftRows变换对状态矩阵的行进行循环移位；
- ● AddRoundKey变换：AddRoundKey变换对状态矩阵和膨胀后的密钥进行异或操作；
（4）经过10轮循环的状态矩阵中的内容就是加密后的密文。
步骤
主要用到的java类有：
类 Cipher
java.lang.Object
javax.crypto.Cipher，主要提供加密解密功能类 KeyGenerator
java.lang.Object
javax.crypto.KeyGenerator，此类提供（对称）密钥生成器的功能。接口 SecretKey
所有超级接口：
Key, Serializable
所有已知子接口：
PBEKey
所有已知实现类：
KerberosKey, SecretKeySpec
加密步骤
- 构造密钥生成器，指定为AES算法，不区分大小写
- 根据ecnodeRules规则初始化密钥生成器
生成一个128位的随机源,根据传入的字节数组 - 产生原始对称密钥
- 获得原始对称密钥的字节数组
- 根据字节数组生成AES密钥
- 根据指定算法AES自成密码器
- 初始化密码器，第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作，第二个参数为使用的KEY
- 获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码
- 根据密码器的初始化方式--加密：将数据加密
- 将加密后的数据转换为字符串
这里用Base64Encoder中会找不到包
解决办法：
在项目的Build path中先移除JRE System Library，再添加库JRE System Library，重新编译后就一切正常了。 - 将字符串返回
效果演示及代码
效果图
代码
AesJM.java
package AesMmx;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class AesJM {
public static String MmxEncode(String theKey, String theText) {
try {
KeyGenerator k = KeyGenerator.getInstance("AES");//密钥生成器
k.init(128, new SecureRandom(theKey.getBytes()));//初始化128位生成器
SecretKey ori_key = k.generateKey();//产生密钥
byte[] sz = ori_key.getEncoded();//密钥转为二进制数组
SecretKey key = new SecretKeySpec(sz, "AES");//转为AES密钥
Cipher c = Cipher.getInstance("AES");//定义AES密码器
c.init(Cipher.ENCRYPT_MODE, key);//传入密码初始化密码器
byte[] content_b = theText.getBytes("utf-8");//获取文本的utf-8二进制数组
byte[] miwen_b = c.doFinal(content_b);//加密
String miwen = new String(new BASE64Encoder().encode(miwen_b));//加密后的二进制转为String
return miwen;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static String MmxDncode(String theKey, String theText) throws UnsupportedEncodingException, IOException {
try {
KeyGenerator k = KeyGenerator.getInstance("AES");
k.init(128, new SecureRandom(theKey.getBytes()));
SecretKey ori_key = k.generateKey();
byte[] sz = ori_key.getEncoded();
SecretKey key = new SecretKeySpec(sz, "AES");
Cipher c = Cipher.getInstance("AES");
c.init(Cipher.DECRYPT_MODE, key);
byte[] content_b = new BASE64Decoder().decodeBuffer(theText);
byte[] mingwen_b = c.doFinal(content_b);//解密
String mingwen = new String(mingwen_b, "utf-8");
return mingwen;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}Net.java
package AesMmx;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Net {
//网络功能，实现互相传数据功能
private static int po = 6666;
//默认端口号
public static void setPo(int port) { //设置端口号
po = port;
}
public static void ListenNet() throws IOException { //监听端口功能，接受数据
while (true) {
ServerSocket serverSocket = new ServerSocket(po); //创建服务器socket
Socket socket = serverSocket.accept(); //监听端口
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr); //输入流
String info = null;
Date time = new Date();
String theTime = "" + time.getTime(); //获取时间戳
File file = new File(theTime + ".txt");
System.out.println(theTime + ".txt"); //收到的信息保存到文件
BufferedWriter bufw = new BufferedWriter(new FileWriter(file));
while ((info = br.readLine()) != null) {
bufw.write(info);
System.out.println("客户端消息" + info);
}
socket.shutdownInput();
bufw.close();
br.close();
isr.close();
is.close();
socket.close();
serverSocket.close();
}
}
public static void send(String ip, int ipport, String str) throws IOException {
Socket socket = new Socket(ip, ipport); //创建socket
OutputStream os = socket.getOutputStream();
PrintWriter pw = new PrintWriter(os); //输出流
pw.write(str); //将数据写出
pw.flush();
socket.shutdownOutput();
pw.close();
os.close();
socket.close();
}
public void run(int port) {
while (true) {
try {
ListenNet(); //一直监听
} catch (IOException ex) {
Logger.getLogger(Net.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}GUI主要组件：
jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
dstIP = new javax.swing.JTextField(); //目的IP框
dstPort = new javax.swing.JTextField(); //目的IP端口框
send = new javax.swing.JButton(); //发送按钮
jLabel3 = new javax.swing.JLabel();
lisPort = new javax.swing.JTextField(); //监听端口框
listen = new javax.swing.JButton(); //监听按钮
jPanel3 = new javax.swing.JPanel();
miyue = new javax.swing.JPasswordField(); //密码框
jLabel1 = new javax.swing.JLabel();
jSeparator1 = new javax.swing.JSeparator();
jScrollPane1 = new javax.swing.JScrollPane();
content = new javax.swing.JTextArea(); //文本框
jSeparator2 = new javax.swing.JSeparator();
jPanel4 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
menulist = new javax.swing.JMenuBar(); //菜单栏
jMenu3 = new javax.swing.JMenu(); //文件按钮
open = new javax.swing.JMenuItem(); //打开文件
save = new javax.swing.JMenuItem(); //保存文件
keyMenu = new javax.swing.JMenu(); //密码按钮
openKey = new javax.swing.JMenuItem(); //打开密码
saveKey = new javax.swing.JMenuItem(); //保存密码MmxGui.java
package AesMmx;
import java.awt.FileDialog;
import java.awt.Frame;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
public class MmxGui extends javax.swing.JFrame {
//图形界面
private Frame f; //窗体
private File file; //windows文件
public MmxGui() {
initComponents(); //初始化
}
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
dstIP = new javax.swing.JTextField(); //目的IP框
dstPort = new javax.swing.JTextField(); //目的IP端口框
send = new javax.swing.JButton(); //发送按钮
jLabel3 = new javax.swing.JLabel();
lisPort = new javax.swing.JTextField(); //监听端口框
listen = new javax.swing.JButton(); //监听按钮
jPanel3 = new javax.swing.JPanel();
miyue = new javax.swing.JPasswordField(); //密码框
jLabel1 = new javax.swing.JLabel();
jSeparator1 = new javax.swing.JSeparator();
jScrollPane1 = new javax.swing.JScrollPane();
content = new javax.swing.JTextArea(); //文本框
jSeparator2 = new javax.swing.JSeparator();
jPanel4 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
menulist = new javax.swing.JMenuBar(); //菜单栏
jMenu3 = new javax.swing.JMenu(); //文件按钮
open = new javax.swing.JMenuItem(); //打开文件
save = new javax.swing.JMenuItem(); //保存文件
keyMenu = new javax.swing.JMenu(); //密码按钮
openKey = new javax.swing.JMenuItem(); //打开密码
saveKey = new javax.swing.JMenuItem(); //保存密码
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("AES加密解密-CJB");
jPanel2.setBorder(javax.swing.BorderFactory.createEtchedBorder());
jLabel2.setFont(new java.awt.Font("等线 Light", 0, 24));
jLabel2.setText("目的IP");
jPanel2.add(jLabel2);
dstIP.setFont(new java.awt.Font("等线 Light", 0, 24));
dstIP.setText("127.0.0.1");
dstIP.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
dstIPActionPerformed(evt);
}
});
jPanel2.add(dstIP);
dstPort.setFont(new java.awt.Font("等线 Light", 0, 24));
dstPort.setText("6666");
jPanel2.add(dstPort);
send.setFont(new java.awt.Font("等线 Light", 0, 24));
send.setText("发送");
send.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
sendActionPerformed(evt);
}
});
jPanel2.add(send);
jLabel3.setFont(new java.awt.Font("等线 Light", 0, 24));
jLabel3.setText("监听端口");
jPanel2.add(jLabel3);
lisPort.setFont(new java.awt.Font("等线 Light", 0, 24));
lisPort.setText("6666");
jPanel2.add(lisPort);
listen.setFont(new java.awt.Font("等线 Light", 0, 24));
listen.setText("开启监听");
listen.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
listenActionPerformed(evt);
}
});
jPanel2.add(listen);
jPanel3.setBorder(javax.swing.BorderFactory.createEtchedBorder());
miyue.setFont(new java.awt.Font("等线 Light", 0, 24));
miyue.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
miyueKeyPressed(evt);
}
});
jLabel1.setFont(new java.awt.Font("等线 Light", 0, 24));
jLabel1.setText("密码");
content.setColumns(20);
content.setRows(5);
jScrollPane1.setViewportView(content);
jPanel4.setBorder(javax.swing.BorderFactory.createEtchedBorder());
jButton1.setFont(new java.awt.Font("等线 Light", 0, 24));
jButton1.setText("加密");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jPanel4.add(jButton1);
jButton2.setFont(new java.awt.Font("等线 Light", 0, 24));
jButton2.setText("解密");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jPanel4.add(jButton2);
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jSeparator1)
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(miyue))))
.addGroup(jPanel3Layout.createSequentialGroup()
.addGap(128, 128, 128)
.addComponent(jScrollPane1))
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jSeparator2))
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addContainerGap())
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(miyue, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jSeparator1, javax.swing.GroupLayout.PREFERRED_SIZE, 10, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 162, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jSeparator2, javax.swing.GroupLayout.PREFERRED_SIZE, 10, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(14, Short.MAX_VALUE))
);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, 637, Short.MAX_VALUE))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
jMenu3.setText("文件");
open.setText("打开");
open.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
openActionPerformed(evt);
}
});
jMenu3.add(open);
save.setText("保存");
save.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
saveActionPerformed(evt);
}
});
jMenu3.add(save);
menulist.add(jMenu3);
keyMenu.setText("密码");
openKey.setText("导入");
openKey.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
openKeyActionPerformed(evt);
}
});
keyMenu.add(openKey);
saveKey.setText("导出");
saveKey.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
saveKeyActionPerformed(evt);
}
});
keyMenu.add(saveKey);
menulist.add(keyMenu);
setJMenuBar(menulist);
pack();
}
private void dstIPActionPerformed(java.awt.event.ActionEvent evt) {
}
private void openActionPerformed(java.awt.event.ActionEvent evt) {
f = new Frame("文件浏览");
f.setBounds(300, 100, 650, 600);
openDia = new FileDialog(f, "打开", FileDialog.LOAD);
openDia.setVisible(true);
String dirpath = openDia.getDirectory();
String fileName = openDia.getFile();
if (dirpath == null || fileName == null)
{
return;
} else {
content.setText(null);
}
File file = new File(dirpath, fileName);
try {
BufferedReader bufr = new BufferedReader(new FileReader(file));
String line = null;
while ((line = bufr.readLine()) != null) {
content.append(line + "\r\n");
}
bufr.close();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}
private void sendActionPerformed(java.awt.event.ActionEvent evt) {
try {
Net.send(dstIP.getText(), Integer.parseInt(dstPort.getText()), content.getText());
} catch (IOException ex) {
Logger.getLogger(MmxGui.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void listenActionPerformed(java.awt.event.ActionEvent evt) {
Net.setPo(Integer.parseInt(lisPort.getText()));
Runnable r = () -> {
try {
Net.ListenNet();
} catch (IOException ex) {
Logger.getLogger(MmxGui.class.getName()).log(Level.SEVERE, null, ex);
}
};
new Thread(r).start();
}
@SuppressWarnings("deprecation")
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
content.setText(AesJM.MmxEncode(miyue.getText(), content.getText()));
}
@SuppressWarnings("deprecation")
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
try {
content.setText(AesJM.MmxDncode(miyue.getText(), content.getText()));
} catch (IOException ex) {
Logger.getLogger(MmxGui.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void saveActionPerformed(java.awt.event.ActionEvent evt) {
saveDia = new FileDialog(f, "保存", FileDialog.SAVE);
if (file == null) {
saveDia.setVisible(true);
String dirpath = saveDia.getDirectory();
String fileName = saveDia.getFile();
if (dirpath == null || fileName == null)
{
return;
} else {
file = new File(dirpath, fileName);
}
}
try {
BufferedWriter bufw = new BufferedWriter(new FileWriter(file));
String text = content.getText();
bufw.write(text);
bufw.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
private void miyueKeyPressed(java.awt.event.KeyEvent evt) {
}
private void openKeyActionPerformed(java.awt.event.ActionEvent evt) {
f = new Frame("密码浏览");
f.setBounds(300, 100, 650, 600);
openDia = new FileDialog(f, "打开", FileDialog.LOAD);
openDia.setVisible(true);
String dirpath = openDia.getDirectory();
String fileName = openDia.getFile();
if (dirpath == null || fileName == null)
{
return;
} else {
miyue.setText(null);
}
File file = new File(dirpath, fileName);
try {
BufferedReader bufr = new BufferedReader(new FileReader(file));
String line = null;
while ((line = bufr.readLine()) != null) {
miyue.setText(line);
}
bufr.close();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}
@SuppressWarnings("deprecation")
private void saveKeyActionPerformed(java.awt.event.ActionEvent evt) {
saveDia = new FileDialog(f, "保存", FileDialog.SAVE);
if (file == null) {
saveDia.setVisible(true);
String dirpath = saveDia.getDirectory();
String fileName = saveDia.getFile();
if (dirpath == null || fileName == null)
{
return;
} else {
file = new File(dirpath, fileName);
}
}
try {
BufferedWriter bufw = new BufferedWriter(new FileWriter(file));
String text = miyue.getText();
bufw.write(text);
bufw.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
public static void main(String args[]) {
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MmxGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MmxGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MmxGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MmxGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MmxGui().setVisible(true);
}
});
}
private FileDialog openDia, saveDia; //windows文件
private javax.swing.JTextArea content;
private javax.swing.JTextField dstIP;
private javax.swing.JTextField dstPort;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JMenu jMenu3;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JSeparator jSeparator1;
private javax.swing.JSeparator jSeparator2;
private javax.swing.JMenu keyMenu;
private javax.swing.JTextField lisPort;
private javax.swing.JButton listen;
private javax.swing.JMenuBar menulist;
private javax.swing.JPasswordField miyue;
private javax.swing.JMenuItem open;
private javax.swing.JMenuItem openKey;
private javax.swing.JMenuItem save;
private javax.swing.JMenuItem saveKey;
private javax.swing.JButton send;
}
小结（2018.6）
这次实验需要完成：图形界面、打开保存文件、网络传输、AES加密解密。其中，最难的部分是AES加密解密算法的实现，需要我们参考Java文档，查询相关加密、解密内容，同时需要我们合理的应用内置类实现加密解密功能。打开、保存文件是另外一个难点。我查阅相关资料，主要是用如下图实现：
保存和打开文件的过程我是使用字符打开，未实现用二进制保存和打开，且部分格式保存会使其成为无效文件。网络功能主要是应用服务器socket和客户端socket实现。用多线程开启服务器监听，当需要发送信息时创建客户端socket进行通信。GUI部分，因为是用netbeans工具，隐藏隐秘信息的文本框利用如下对象实现：
经过这次实验，我对密码学中的加密、解密原理有更深的认识和研究，也体会到密码学与现实生活的结合、应用。