java怎么实现AES的五种加密模式

在Java中，可以使用Java Cryptography Architecture (JCA)来实现AES的五种加密模式。以下是一些示例代码：

1. 电子密码本模式 (Electronic Codebook Mode, ECB)

import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import java.util.Base64;  public class AESExample {     public static void main(String[] args) throws Exception {         String plaintext = "Hello, World!";         String key = "0123456789abcdef"; // 16字节的AES密钥          SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");         Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");         cipher.init(Cipher.ENCRYPT_MODE, secretKey);          byte[] encryptedBytes = cipher.doFinal(plaintext.getBytes());         String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);          System.out.println("Encrypted Text: " + encryptedText);     } } 

2. 密码分组链接模式 (Cipher Block Chaining Mode, CBC)

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.util.Base64;  public class AESExample {     public static void main(String[] args) throws Exception {         String plaintext = "Hello, World!";         String key = "0123456789abcdef"; // 16字节的AES密钥         String iv = "fedcba9876543210"; // 16字节的初始化向量          SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");         IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes());         Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");         cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);          byte[] encryptedBytes = cipher.doFinal(plaintext.getBytes());         String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);          System.out.println("Encrypted Text: " + encryptedText);     } } 

3. 密文反馈模式 (Cipher Feedback Mode, CFB)

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.util.Base64;  public class AESExample {     public static void main(String[] args) throws Exception {         String plaintext = "Hello, World!";         String key = "0123456789abcdef"; // 16字节的AES密钥         String iv = "fedcba9876543210"; // 16字节的初始化向量          SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");         IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes());         Cipher cipher = Cipher.getInstance("AES/CFB/PKCS5Padding");         cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);          byte[] encryptedBytes = cipher.doFinal(plaintext.getBytes());         String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);          System.out.println("Encrypted Text: " + encryptedText);     } } 

4. 输出反馈模式 (Output Feedback Mode, OFB)

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.util.Base64;  public class AESExample {     public static void main(String[] args) throws Exception {         String plaintext = "Hello, World!";         String key = "0123456789abcdef"; // 16字节的AES密钥         String iv = "fedcba9876543210"; // 16字节的初始化向量          SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");         IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes());         Cipher cipher = Cipher.getInstance("AES/OFB/PKCS5Padding");         cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);          byte[] encryptedBytes = cipher.doFinal(plaintext.getBytes());         String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);          System.out.println("Encrypted Text: " + encryptedText);     } } 

5. 计数器模式 (Counter Mode, CTR)

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.util.Base64;  public class AESExample {     public static void main(String[] args) throws Exception {         String plaintext = "Hello, World!";         String key = "0123456789abcdef"; // 16字节的AES密钥         String iv = "fedcba9876543210"; // 16字节的初始化向量          SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "