AESUtil

package com.zhuyun.aes;

import java.io.IOException;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class AESUtil {
	//生成AES祕鑰，然後Base64編碼
	public static String genKeyAES() throws Exception{
		KeyGenerator keyGen = KeyGenerator.getInstance("AES");
		keyGen.init(128);
		SecretKey key = keyGen.generateKey();
		String base64Str = byte2Base64(key.getEncoded());
		return base64Str;
	}
	
	//將Base64編碼後的AES祕鑰轉換成SecretKey物件
	public static SecretKey loadKeyAES(String base64Key) throws Exception{
		byte[] bytes = base642Byte(base64Key);
		SecretKeySpec key = new SecretKeySpec(bytes, "AES");
		return key;
	}
	
	//位元組陣列轉Base64編碼
	public static String byte2Base64(byte[] bytes){
		BASE64Encoder encoder = new BASE64Encoder();
		return encoder.encode(bytes);
	}
	
	//Base64編碼轉位元組陣列
	public static byte[] base642Byte(String base64Key) throws IOException{
		BASE64Decoder decoder = new BASE64Decoder();
		return decoder.decodeBuffer(base64Key);
	}
	
	//加密
	public static byte[] encryptAES(byte[] source, SecretKey key) throws Exception{
		Cipher cipher = Cipher.getInstance("AES");
		cipher.init(Cipher.ENCRYPT_MODE, key);
		return cipher.doFinal(source);
	}
	
	//解密
	public static byte[] decryptAES(byte[] source, SecretKey key) throws Exception{
		Cipher cipher = Cipher.getInstance("AES");
		cipher.init(Cipher.DECRYPT_MODE, key);
		return cipher.doFinal(source);
	}
}
 

TestAES

package com.zhuyun.test;

import javax.crypto.SecretKey;

import org.junit.Test;

import com.zhuyun.aes.AESUtil;

public class TestAES {

	@Test
	public void testAES(){
		try {
			//=================客戶端=================
			//hello, i am infi, good night!加密
			String message = "hello, i am infi, good night!";
			//生成AES祕鑰，並Base64編碼
			String base64Str = AESUtil.genKeyAES();
			System.out.println("AES祕鑰Base64編碼:" + base64Str);
			//將Base64編碼的字串，轉換成AES祕鑰
			SecretKey aesKey = AESUtil.loadKeyAES(base64Str);
			//加密
			byte[] encryptAES = AESUtil.encryptAES(message.getBytes(), aesKey);
			//加密後的內容Base64編碼
			String byte2Base64 = AESUtil.byte2Base64(encryptAES);
			System.out.println("加密並Base64編碼的結果：" + byte2Base64);
			
			
			//##############	網路上傳輸的內容有Base64編碼後的祕鑰 和 Base64編碼加密後的內容		#################
			
			
			//===================服務端================
			//將Base64編碼的字串，轉換成AES祕鑰
			SecretKey aesKey2 = AESUtil.loadKeyAES(base64Str);
			//加密後的內容Base64解碼
			byte[] base642Byte = AESUtil.base642Byte(byte2Base64);
			//解密
			byte[] decryptAES = AESUtil.decryptAES(base642Byte, aesKey2);
			//解密後的明文
			System.out.println("解密後的明文: " + new String(decryptAES));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}
 

AES祕鑰Base64編碼:UrlSOS8igqefseqoeJUwbg==
加密並Base64編碼的結果：7QXSwDckiqIWz1SfpAG48++ex3Zcjv92Uhl5zppqjTQ=
解密後的明文: hello, i am infi, good night!