Java-生成字符串的MD5值

方法一：
public static String getMd5(String str) {
    MessageDigest md5 = null;
    try {
        md5 = MessageDigest.getInstance("MD5");
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
    byte[] bs = md5.digest(str.getBytes());
    StringBuilder sb = new StringBuilder(40);
    for(byte x:bs) {
        if((x & 0xff)>>4 == 0) {
            sb.append("0").append(Integer.toHexString(x & 0xff));
        } else {
            sb.append(Integer.toHexString(x & 0xff));
        }
    }
    return sb.toString();
}

方法二、

String  contentMd5 = BinaryUtil.toBase64String(BinaryUtil.calculateMd5(content.getBytes()));