AES加密解密代码,Java代码库,德仔网

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【Java】 AES加密解密
作者:QH_C / 发布于2015/8/19/ 692

	package com.soufun.com;
	
	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;
	
	/**
	* @author WHD data 2015年8月16日
	*/
	public class AesUtil {
	 /*
	 * @param content:
	 *
	 * @param password:
	 */
	 private static byte[] encrypt(String content, String password) {
	 try {
	 KeyGenerator kgen = KeyGenerator.getInstance("AES");
	 // 使用128 位
	 kgen.init(128, new SecureRandom(password.getBytes()));
	 SecretKey secretKey = kgen.generateKey();
	 byte[] encodeFormat = secretKey.getEncoded();
	 SecretKeySpec key = new SecretKeySpec(encodeFormat, "AES");
	 // Cipher对象实际完成加密操作
	 Cipher cipher = Cipher.getInstance("AES");
	 // 加密内容进行编码
	 byte[] byteContent = content.getBytes("utf-8");
	 // 用密匙初始化Cipher对象
	 cipher.init(Cipher.ENCRYPT_MODE, key);
	 // 正式执行加密操作
	 byte[] result = cipher.doFinal(byteContent);
	 return result;
	 } 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;
	 }
	
	 /*
	 * @param content:
	 *
	 * @param password:
	 */
	 private static byte[] decrypt(byte[] content, String password) {
	 try {
	 KeyGenerator kgen = KeyGenerator.getInstance("AES");
	 // 使用128 位
	 kgen.init(128, new SecureRandom(password.getBytes()));
	 SecretKey secretKey = kgen.generateKey();
	 byte[] encodeFormat = secretKey.getEncoded();
	 SecretKeySpec key = new SecretKeySpec(encodeFormat, "AES");
	 // Cipher对象实际完成加密操作
	 Cipher cipher = Cipher.getInstance("AES");
	 // 用密匙初始化Cipher对象
	 cipher.init(Cipher.DECRYPT_MODE, key);
	 // 正式执行解密操作
	 byte[] result = cipher.doFinal(content);
	 return result;
	 } 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;
	 }
	
	 /**
	 * 二进制--》十六进制转化
	 *
	 * @param buf
	 * @return
	 */
	 private static String parseByte2HexStr(byte buf[]) {
	 StringBuffer sb = new StringBuffer();
	 for (int i = 0; i < buf.length; i++) {
	 String hex = Integer.toHexString(buf[i] & 0xFF);
	 if (hex.length() == 1) {
	 hex = '0' + hex;
	 }
	 sb.append(hex.toUpperCase());
	 }
	 return sb.toString();
	 }
	
	 /**
	 * 十六进制--》二进制转化
	 *
	 * @param hexStr
	 * @return
	 */
	 private static byte[] parseHexStr2Byte(String hexStr) {
	 if (hexStr.length() < 1) {
	 return null;
	 }
	
	 byte[] result = new byte[hexStr.length() / 2];
	 for (int i = 0; i < hexStr.length() / 2; i++) {
	 int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
	 int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),
	 16);
	 result[i] = (byte) (high * 16 + low);
	 }
	 return result;
	 }
	
	 public static void main(String[] args) throws UnsupportedEncodingException {
	 String content = "testaes加密";
	 String password = "12345678dd";
	 // 加密
	 System.out.println("加密前：" + content);
	 byte[] encryptResult = encrypt(content, password);
	 String encryptResultStr = parseByte2HexStr(encryptResult);
	 System.out.println("加密后：" + encryptResultStr);
	 // 解密
	 byte[] decryptFrom = parseHexStr2Byte(encryptResultStr);
	 byte[] decryptResult = decrypt(decryptFrom, password);
	 // 解密内容进行解码
	 String result = new String(decryptResult, "utf-8");
	 System.out.println("解密后：" + result);
	 }
	
	}
试试其它关键字
　AES　　加密解密　
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