比较简单，直接贴代码
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
- public class MD5 {
- public static String getMD5(String content) {
- try {
- MessageDigest digest = MessageDigest.getInstance("MD5");
- digest.update(content.getBytes());
- return getHashString(digest);
- } catch (NoSuchAlgorithmException e) {
- e.printStackTrace();
- }
- return null;
- }
- private static String getHashString(MessageDigest digest) {
- StringBuilder builder = new StringBuilder();
- for (byte b : digest.digest()) {
- builder.append(Integer.toHexString((b >> 4) & 0xf));
- builder.append(Integer.toHexString(b & 0xf));
- }
- return builder.toString();
- }
- }
