MD5.java

package cn.itcast.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
*  MD5编码类
*/
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();
    }
}