java实现AES的简单加密解密

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秘钥，然后Base64编码
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;
}

//将Base64编码后的AES秘钥转换成SecretKey对象
public static SecretKey loadKeyAES(String base64Key) throws Exception{
byte[] bytes = base642Byte(base64Key);
SecretKeySpec key = new SecretKeySpec(bytes, "AES");
return key;
}

//字节数组转Base64编码
public static String byte2Base64(byte[] bytes){
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(bytes);
}

//Base64编码转字节数组
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);
}
}

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 {
//=================客户端=================
//hello, i am infi, good night!加密
String message = "hello, i am infi, good night!";
//生成AES秘钥，并Base64编码
String base64Str = AESUtil.genKeyAES();
System.out.println("AES秘钥Base64编码:" + base64Str);
//将Base64编码的字符串，转换成AES秘钥
SecretKey aesKey = AESUtil.loadKeyAES(base64Str);
//加密
byte[] encryptAES = AESUtil.encryptAES(message.getBytes(), aesKey);
//加密后的内容Base64编码
String byte2Base64 = AESUtil.byte2Base64(encryptAES);
System.out.println("加密并Base64编码的结果：" + byte2Base64);

//##############	网络上传输的内容有Base64编码后的秘钥 和 Base64编码加密后的内容		#################

//===================服务端================
//将Base64编码的字符串，转换成AES秘钥
SecretKey aesKey2 = AESUtil.loadKeyAES(base64Str);
//加密后的内容Base64解码
byte[] base642Byte = AESUtil.base642Byte(byte2Base64);
//解密
byte[] decryptAES = AESUtil.decryptAES(base642Byte, aesKey2);
//解密后的明文
System.out.println("解密后的明文: " + new String(decryptAES));
} catch (Exception e) {
e.printStackTrace();
}
}

}

AES秘钥Base64编码:UrlSOS8igqefseqoeJUwbg==
加密并Base64编码的结果：7QXSwDckiqIWz1SfpAG48++ex3Zcjv92Uhl5zppqjTQ=
解密后的明文: hello, i am infi, good night!