首先代码取至网络,代码有坑在所难免,以下代码验证可用,怎么填坑我就不说了.废话不多说,上代码
AesEncryptionUtil.java
import java.io.UnsupportedEncodingException;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class AesEncryptionUtil {
/** 算法/模式/填充 **/
private static final String CipherMode = "AES/CBC/NoPadding";
/** 创建密钥 **/
private static SecretKeySpec createKey(String key) {
byte[] data = null;
if (key == null) {
key = "";
}
StringBuffer sb = new StringBuffer(16);
sb.append(key);
while (sb.length() < 16) {
sb.append("0");
}
if (sb.length() > 16) {
sb.setLength(16);
}
try {
data = sb.toString().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return new SecretKeySpec(data, "AES");
}
private static IvParameterSpec createIV(String password) {
byte[] data = null;
if (password == null) {
password = "";
}
StringBuffer sb = new StringBuffer(16);
sb.append(password);
while (sb.length() < 16) {
sb.append("0");
}
if (sb.length() > 16) {
sb.setLength(16);
}
try {
data = sb.toString().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return new IvParameterSpec(data);
}
/** 加密字节数据 **/
public static byte[] encrypt(byte[] content, String password, String iv) {
try {
// String encryptResultStr = parseByte2HexStr(content);
SecretKeySpec key = createKey(password);
Cipher cipher = Cipher.getInstance(CipherMode);
cipher.init(Cipher.ENCRYPT_MODE, key, createIV(iv));
int len = content.length;
/* 计算补0后的长度 */
while (len % 16 != 0) {
len++;
}
byte[] sraw = new byte[len];
/* 在最后补0 */
for (int i = 0; i < len; ++i) {
if (i < content.length) {
sraw[i] = content[i];
} else {
sraw[i] = 0;
}
}
return cipher.doFinal(sraw);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 将二进制转换成16进制
*
* @param buf
* @return
*/
public 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();
}
/**
* 将16进制转换为二进制
*
* @param hexStr
* @return
*/
public 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;
}
/**
* 加密
*/
public static String encrypt(String content) {
return encrypt(content, Key.KEY, Key.KEYIV);
}
/** 加密(结果为16进制字符串) **/
public static String encrypt(String content, String password, String iv) {
byte[] data = null;
try {
data = content.getBytes("UTF-8");
} catch (Exception e) {
e.printStackTrace();
}
data = encrypt(data, password, iv);
return Base64Utils.encode(data);
}
/** 解密字节数组 **/
public static byte[] decrypt(byte[] content) {
return decrypt(content, Key.KEY, Key.KEYIV);
}
/** 解密字节数组 **/
public static byte[] decrypt(byte[] content, String password, String iv) {
try {
SecretKeySpec key = createKey(password);
Cipher cipher = Cipher.getInstance(CipherMode);
cipher.init(Cipher.DECRYPT_MODE, key, createIV(iv));
byte[] result = cipher.doFinal(content);
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/** 解密(输出结果为字符串) **/
public static String decrypt(String content) {
return decrypt(content, Key.KEY, Key.KEYIV);
}
/** 解密(输出结果为字符串) **/
public static String decrypt(String content, String password, String iv) {
byte[] data = null;
try {
data = Base64Utils.decode(content);
} catch (Exception e) {
e.printStackTrace();
}
data = decrypt(data, password, iv);
if (data == null) {
return null;
}
String result = null;
try {
result = new String(data, "UTF-8").trim();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return result;
}
/** 字节数组转成16进制字符串 **/
public static String byte2hex(byte[] b) { // 一个字节的数，
StringBuffer sb = new StringBuffer(b.length * 2);
String tmp = "";
for (int n = 0; n < b.length; n++) {
// 整数转成十六进制表示
tmp = (Integer.toHexString(b[n] & 0XFF));
if (tmp.length() == 1) {
sb.append("0");
}
sb.append(tmp);
}
// return sb.toString().toUpperCase(); // 转成大写
return sb.toString(); // 转成大写
}
/** 将hex字符串转换成字节数组 **/
public static byte[] hex2byte(String inputString) {
if (inputString == null || inputString.length() < 2) {
return new byte[0];
}
inputString = inputString.toLowerCase();
int l = inputString.length() / 2;
byte[] result = new byte[l];
for (int i = 0; i < l; ++i) {
String tmp = inputString.substring(2 * i, 2 * i + 2);
result[i] = (byte) (Integer.parseInt(tmp, 16) & 0xFF);
}
return result;
}
}
Key.java
public class Key {
/**
* 密钥,这个是后台大佬和我们的约定
*/
public static final String KEY = "$75k!xxH&$EhQLyv"; // 密钥
/**
* 密钥偏移
*/
public static final String KEYIV = MD5Utils.md5(KEY).substring(0, 16); // 密钥偏移
}
Base64Utils.java
import java.io.UnsupportedEncodingException;
/**
* @author Rocko
*/
public class Base64Utils {
private static char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D',
'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q',
'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q',
'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/' };
private static byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59,
60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1,
-1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1,
-1, -1 };
public static String encode(byte[] data) {
StringBuffer sb = new StringBuffer();
int len = data.length;
int i = 0;
int b1, b2, b3;
while (i < len) {
b1 = data[i++] & 0xff;
if (i == len) {
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
sb.append("==");
break;
}
b2 = data[i++] & 0xff;
if (i == len) {
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4)
| ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
sb.append("=");
break;
}
b3 = data[i++] & 0xff;
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4)
| ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[((b2 & 0x0f) << 2)
| ((b3 & 0xc0) >>> 6)]);
sb.append(base64EncodeChars[b3 & 0x3f]);
}
return sb.toString();
}
public static byte[] decode(String str) {
try {
return decodePrivate(str);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return new byte[] {};
}
private static byte[] decodePrivate(String str)
throws UnsupportedEncodingException {
StringBuffer sb = new StringBuffer();
byte[] data = null;
data = str.getBytes("US-ASCII");
int len = data.length;
int i = 0;
int b1, b2, b3, b4;
while (i < len) {
do {
b1 = base64DecodeChars[data[i++]];
} while (i < len && b1 == -1);
if (b1 == -1)
break;
do {
b2 = base64DecodeChars[data[i++]];
} while (i < len && b2 == -1);
if (b2 == -1)
break;
sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));
do {
b3 = data[i++];
if (b3 == 61)
return sb.toString().getBytes("iso8859-1");
b3 = base64DecodeChars[b3];
} while (i < len && b3 == -1);
if (b3 == -1)
break;
sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));
do {
b4 = data[i++];
if (b4 == 61)
return sb.toString().getBytes("iso8859-1");
//return sb.toString().getBytes("utf-8");
b4 = base64DecodeChars[b4];
} while (i < len && b4 == -1);
if (b4 == -1)
break;
sb.append((char) (((b3 & 0x03) << 6) | b4));
}
return sb.toString().getBytes("iso8859-1");
//return sb.toString().getBytes("utf-8");
}
}
MD5Utils.java
public class MD5Utils {
public static String md5(String plainText){
byte[] secretBytes = null;
try {
secretBytes = MessageDigest.getInstance("md5").digest(
plainText.getBytes());
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("没有md5这个算法！");
}
String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制数字
// 如果生成数字未满32位，需要前面补0
for (int i = 0; i < 32 - md5code.length(); i++) {
md5code = "0" + md5code;
}
return md5code;
}
}
调用方式
public static void main(String[] args) {
String encrypt = AesEncryptionUtil.encrypt("123456");
String decrypt = AesEncryptionUtil.decrypt(AesEncryptionUtil.encrypt("123456"));
System.out.println("#加密串#" + encrypt);
System.out.println("#解密串#" + decrypt);
}
执行结果:
===================================
#加密串#Pn0/Mwp7v4CyNiK+9O1HCg==
#解密串#123456
===================================
tips: 吹个牛,Java后台没验证,因为后台大佬是Php,没有Java后台,个人认为Android通,Java通
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