代码语言：javascript复制
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class HashUtils {
private static final char[] HEX_CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
'f' };
public static char[] encodeHex(byte[] bytes) {
char[] chars = new char[32];
for (int i = 0; i < chars.length; i = 2) {
byte b = bytes[(i / 2)];
chars[i] = HEX_CHARS[(b >>> 4 & 0xF)];
chars[(i 1)] = HEX_CHARS[(b & 0xF)];
}
return chars;
}
public static MessageDigest getDigest(String algorithm) {
try {
return MessageDigest.getInstance(algorithm);
} catch (NoSuchAlgorithmException ex) {
throw new IllegalStateException("Could not find MessageDigest with algorithm "" algorithm """, ex);
}
}
public static String md5(String src) {
MessageDigest md5 = getDigest("MD5");
return new String(encodeHex(md5.digest(src.getBytes())));
}
public static String toSign(Map<String,Object> map) {
return "";
};
public static String getFormatParams(Map<String, Object> params,boolean flag) throws UnsupportedEncodingException {
List<Map.Entry<String, Object>> infoIds =
new ArrayList<Map.Entry<String, Object>>((Collection<? extends Entry<String, Object>>) params.entrySet());
Collections.sort(infoIds, new Comparator<Map.Entry<String, Object>>() {
public int compare(Map.Entry<String, Object> arg0, Map.Entry<String, Object> arg1) {
return (arg0.getKey()).compareTo(arg1.getKey());
}
});
String ret = "";
for (Map.Entry<String, Object> entry : infoIds) {
ret = entry.getKey();
ret = "=";
if(flag) {
if(generateJudgment(entry.getValue().toString())) {
ret =URLEncoder.encode(entry.getValue().toString(), "UTF-8") ;
}else {
ret = entry.getValue().toString();
}
}else {
ret = entry.getValue().toString();
}
ret = "&";
}
ret = ret.substring(0, ret.length() - 1);
return ret;
}
//判断是否有汉字
public static boolean generateJudgment(String countname){
Pattern p = Pattern.compile("[u4e00-u9fa5]");
Matcher isNum = p.matcher(countname);
if (isNum.find()) {
return true;
}
return false;
}
public static void main(String[] args) {
String stringToSign = "B856915E" "57C8666D91C346D1A23C766A4B8EDA85" "1584338529869";
System.out.println(md5(stringToSign));
}
}
