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package com.govmade.common.oauth2;
import java.security.MessageDigest;
import java.util.UUID;
import com.govmade.common.exception.RRException;
/**
* 生成token
*
* @author chenshun
* @email sunlightcs@gmail.com
* @date 2017-05-20 14:41
*/
public class TokenGenerator {
public static String generateValue() {
return generateValue(UUID.randomUUID().toString());
}
private static final char[] hexCode = "0123456789abcdef".toCharArray();
public static String toHexString(byte[] data) {
if(data == null) {
return null;
}
StringBuilder r = new StringBuilder(data.length*2);
for ( byte b : data) {
r.append(hexCode[(b >> 4) & 0xF]);
r.append(hexCode[(b & 0xF)]);
}
return r.toString();
}
public static String generateValue(String param) {
try {
MessageDigest algorithm = MessageDigest.getInstance("MD5");
algorithm.reset();
algorithm.update(param.getBytes());
byte[] messageDigest = algorithm.digest();
return toHexString(messageDigest);
} catch (Exception e) {
throw new RRException("生成Token失败", e);
}
}
}