JAVA AES加密算法实现代码

短命女 2023-10-18 09:55 11阅读 0赞

package com.zhaochao.utill;
    import java.io.UnsupportedEncodingException;
    import java.security.InvalidKeyException;
    import java.security.NoSuchAlgorithmException;
    import java.security.SecureRandom;
    import javax.crypto.BadPaddingException;
    import javax.crypto.Cipher;
    import javax.crypto.IllegalBlockSizeException;
    import javax.crypto.KeyGenerator;
    import javax.crypto.NoSuchPaddingException;
    import javax.crypto.SecretKey;
    import javax.crypto.spec.SecretKeySpec;
    public class AESUitl {
            public static byte[] encrypt(String content, String password) {
                    try {
                            KeyGenerator kgen = KeyGenerator.getInstance("AES");
                            kgen.init(128, new SecureRandom(password.getBytes()));
                            SecretKey secretKey = kgen.generateKey();
                            byte[] enCodeFormat = secretKey.getEncoded();
                            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
                            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
                            byte[] byteContent = content.getBytes("utf-8");
                            cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
                            byte[] result = cipher.doFinal(byteContent);
                            return result; // 加密
                    } catch (NoSuchAlgorithmException e) {
                            e.printStackTrace();
                    } catch (NoSuchPaddingException e) {
                            e.printStackTrace();
                    } catch (InvalidKeyException e) {
                            e.printStackTrace();
                    } catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                    } catch (IllegalBlockSizeException e) {
                            e.printStackTrace();
                    } catch (BadPaddingException e) {
                            e.printStackTrace();
                    }
                    return null;
            }
            public static byte[] decrypt(byte[] content, String password) {
                    try {
                            KeyGenerator kgen = KeyGenerator.getInstance("AES");
                            kgen.init(128, new SecureRandom(password.getBytes()));
                            SecretKey secretKey = kgen.generateKey();
                            byte[] enCodeFormat = secretKey.getEncoded();
                            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
                            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
                            cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
                            byte[] result = cipher.doFinal(content);
                            return result; // 加密
                    } catch (NoSuchAlgorithmException e) {
                            e.printStackTrace();
                    } catch (NoSuchPaddingException e) {
                            e.printStackTrace();
                    } catch (InvalidKeyException e) {
                            e.printStackTrace();
                    } catch (IllegalBlockSizeException e) {
                            e.printStackTrace();
                    } catch (BadPaddingException e) {
                            e.printStackTrace();
                    }
                    return null;
            }
            public static void main(String[] rags) {
                    String content = "test2222";
                    String password = "12345678";
                    // 加密
                    System.out.println("加密前：" + content);
                    byte[] encryptResult = encrypt(content, password);
                    System.out.println("加密后："+new String(encryptResult));
                    // 解密
                    byte[] decryptResult = decrypt(encryptResult, password);
                    System.out.println("解密后：" + new String(decryptResult));
            }
    }

2、输出结果

加密前：test2222  
加密后：��»�4�s-�?�D�H�  
解密后：test2222