in.hocg.boot.cps.autoconfiguration.impl.dataoke.lib.SignMD5Util Maven / Gradle / Ivy
package in.hocg.boot.cps.autoconfiguration.impl.dataoke.lib;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeMap;
/**
* @Title: SignMD5Util
* @Description: 签名相关工具类
* @Version V1.0
*/
public class SignMD5Util {
/**
* 获取签名的util
*
* @param map 请求参数
* @param secretKey 密钥
* @return
*/
public static String getSignStr(TreeMap map, String secretKey) {
if (map.size() == 0) {
return "";
}
StringBuffer sb = new StringBuffer("");
Set keySet = map.keySet();
Iterator iter = keySet.iterator();
while (iter.hasNext()) {
String key = iter.next();
sb.append("&" + key + "=" + map.get(key));
}
sb.deleteCharAt(0);
return sign(sb.toString(), secretKey);
}
/**
* 获取签名的util
*
* @param map 请求参数
* @param secretKey 密钥
* @return
*/
public static String getSignStrNew(TreeMap map, String secretKey) {
if (map.size() == 0) {
return "";
}
StringBuilder sb = new StringBuilder();
sb.append("appKey=");
sb.append(map.get("appKey"));
sb.append("&timer=");
sb.append(map.get("timer"));
sb.append("&nonce=");
sb.append(map.get("nonce"));
System.out.println(sb.toString());
return sign(sb.toString(), secretKey);
}
public static String sign(String content, String key) {
String signStr = "";
signStr = content + "&key=" + key;
//MD5加密后，字符串所有字符转换为大写
return MD5(signStr).toUpperCase();
}
/**
* MD5加密算法
*
* @param s
* @return
* @see [类、类#方法、类#成员]
*/
public final static String MD5(String s) {
char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
try {
byte[] btInput = s.getBytes(StandardCharsets.UTF_8);
MessageDigest mdInst = MessageDigest.getInstance("MD5");
mdInst.update(btInput);
byte[] md = mdInst.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str).toLowerCase();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}