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import java.security.SecureRandom;
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import java.util.Base64;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.crypto.Cipher;
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import javax.crypto.KeyGenerator;
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import javax.crypto.spec.SecretKeySpec;
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public class test
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{
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private static final String KEY_ALGORITHM = "AES";
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private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法
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/**
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* AES 加密操作
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*
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* @param content 待加密内容
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* @param key 加密密钥
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* @return 返回Base64转码后的加密数据
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*/
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public static String encrypt(String content, String key) {
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try {
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Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
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byte[] byteContent = content.getBytes("utf-8");
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cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(key));// 初始化为加密模式的密码器
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byte[] result = cipher.doFinal(byteContent);// 加密
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return Base64.getEncoder().encodeToString(result);//通过Base64转码返回
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} catch (Exception ex) {
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}
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return null;
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}
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/**
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* AES 解密操作
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*
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* @param content
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* @param key
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* @return
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*/
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public static String decrypt(String content, String key) {
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try {
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//实例化
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Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
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//使用密钥初始化，设置为解密模式
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cipher.init(Cipher.DECRYPT_MODE, getSecretKey(key));
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//执行操作
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byte[] result = cipher.doFinal(Base64.getDecoder().decode(content));
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return new String(result, "utf-8");
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} catch (Exception ex) {
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}
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return null;
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}
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/**
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* 生成加密秘钥
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*
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* @return
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*/
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private static SecretKeySpec getSecretKey(final String key) {
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//返回生成指定算法密钥生成器的 KeyGenerator 对象
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try {
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KeyGenerator _generator = KeyGenerator.getInstance("AES");
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SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
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secureRandom.setSeed(key.getBytes());
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_generator.init(128, secureRandom);
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return new SecretKeySpec(_generator.generateKey().getEncoded(), KEY_ALGORITHM);
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} catch (Exception e) {
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throw new RuntimeException(" 初始化密钥出现异常 ");
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}
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}
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public static void main (String[] args) throws java.lang.Exception
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{
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}
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}
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