一、ShortUrlHelper.java
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.*;
import javax.crypto.spec.DESKeySpec;
import java.io.IOException;
import java.net.URLEncoder;
import java.security.*;
public class ShortUrlHelper {
private final static String DES = "DES";
private final static String ENCODE = "GBK";
/**
* Description 根据键值进行加密
* @param data 待加密数据
* @param key 密钥
* @return
* @throws Exception
*/
public static String encrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(ENCODE), key.getBytes(ENCODE));
String strs = new BASE64Encoder().encode(bt);
strs = strs.replaceAll("\n","72Fn");
strs = strs.replaceAll("\r","82Fr");
return strs;
}
/**
* 根据键值进行解密
* @param data 待解密数据
* @param key 密钥
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data, String key) throws IOException,Exception {
if (data == null)
return null;
data = URLEncoder.encode(data,"UTF-8");;
data = data.replace("%2F","/").replace("%3D","=").replace("72Fn","\n").replace("82Fr","\r");
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, key.getBytes(ENCODE));
return new String(bt, ENCODE);
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂,然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂,然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
}
二、外网
外网接口需要
URLEncoder.encode(json,"utf-8"); 然后在解密
ShortUrlHelper.decrypt(json,"秘钥");
以上就诠释了 内网生成短链接,用手机扫码对外网进行访问。可能会出现 网络符号,所以要进行 URLEncoder