Java Base64、AES、SHA1、MD5加密算法

public class DecriptTest {

public static String SHA1(String decript) {
try {
MessageDigest digest = java.security.MessageDigest
.getInstance("SHA-1");
digest.update(decript.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();

} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}

public static String SHA(String decript) {
try {
MessageDigest digest = java.security.MessageDigest
.getInstance("SHA");
digest.update(decript.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();

} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}

public static String MD5(String input) {
try {
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(input.getBytes());
// 获得密文
byte[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < md.length; i++) {
String shaHex = Integer.toHexString(md[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}

/**
* 加密
*
* @param content
*            需要加密的内容
* @param password
*            加密密码
* @return
*/
public static byte[] encryptAES(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} 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;
}

/**
* 解密
*
* @param content
*            待解密内容
* @param password
*            解密密钥
* @return
*/
public static byte[] decryptAES(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(content);
return result; // 加密
} 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;
}

/**
* BASE64解密
*
* @param key
* @return
* @throws Exception
*/
public static String decryptBASE64(String key) {

return "";
}

/**
* BASE64加密
*
* @param key
* @return
* @throws Exception
*/
public static String encryptBASE64(String key) {

return "";
}
}