工具类：
package com.sgl.test;import java.security.SecureRandom;
import java.util.HashMap;
import java.util.Map;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;public class SecretUtils {public static final String DES = "DES";public static final String AES = "AES";private static Map<String, Integer> keySize = new HashMap<>();static {keySize.put(DES, 56);keySize.put(AES, 128);}public static String encrypt(String data, String key, String algorithm) {try {if (StringUtils.isBlank(data) || StringUtils.isBlank(key)) {return null;}byte[] content = data.getBytes("UTF-8");KeyGenerator kgen = KeyGenerator.getInstance(algorithm);SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");secureRandom.setSeed(key.getBytes());kgen.init(keySize.get(algorithm), secureRandom);SecretKey secretKey = kgen.generateKey();byte[] enCodeFormat = secretKey.getEncoded();SecretKeySpec keySpec = new SecretKeySpec(enCodeFormat, algorithm);Cipher cipher = Cipher.getInstance(algorithm);// 创建密码器cipher.init(Cipher.ENCRYPT_MODE, keySpec);// 初始化byte[] result = cipher.doFinal(content);return parseByte2HexStr(result);} catch (Exception e) {e.printStackTrace();}return null;}public static String decrypt(String data, String key, String algorithm) {try {if (StringUtils.isBlank(data) || StringUtils.isBlank(key)) {return null;}byte[] content = parseHexStr2Byte(data);KeyGenerator kgen = KeyGenerator.getInstance(algorithm);SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");secureRandom.setSeed(key.getBytes());kgen.init(keySize.get(algorithm), secureRandom);SecretKey secretKey = kgen.generateKey();byte[] enCodeFormat = secretKey.getEncoded();SecretKeySpec keySpec = new SecretKeySpec(enCodeFormat, algorithm);Cipher cipher = Cipher.getInstance(algorithm);// 创建密码器cipher.init(Cipher.DECRYPT_MODE, keySpec);// 初始化byte[] result = cipher.doFinal(content);return new String(result, "UTF-8");} catch (Exception e) {e.printStackTrace();}return null;}/*** 将二进制转换成16进制** @param buf* @return*/private static String parseByte2HexStr(byte buf[]) {StringBuilder sb = new StringBuilder();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();}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;}
}
main方法验证
package com.sgl.test;public class SglTest {public static void main(String[]args){String json = "{/'a/':2,/'b/:10'}";String enstring = SecretUtils.encrypt(json, "qq93667454", "AES");System.out.println(enstring);String destring = SecretUtils.decrypt(enstring, "qq93667454", "AES");System.out.println(destring);}
}