我没有系统学习相关知识，以后如果有机会，会系统研究下：
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public static String md5_32Encrypt(byte[] bytes) {
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
} catch (Exception e) {
e.printStackTrace();
throw new BusinessException(PICTURE_UPLOAD_WRONG);
}
byte[] md5Bytes = md5.digest(bytes);
StringBuilder sb = new StringBuilder();
for (byte md5Byte : md5Bytes) {
int val = ((int) md5Byte) & 0xff;
if (val < 16) {
sb.append("0");
}
sb.append(Integer.toHexString(val));
}
return sb.toString();
}
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参考资料
- java MD5加密(32位MD5加密,16位MD5加密后base64后URL编码,16位MD5base64编码)