【Java】MD5编码加密-code片段

package cn.szy.zths.basic;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5 {
    /**
     * MD5加密
     * 
     * @param plainText 加密文本
     * @return 返回加密后的文本
     */
    public  String Md5(String plainText) {
        String password = null;
        try {

            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(plainText.getBytes());
            byte b[] = md.digest();
            int i;

            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            password = buf.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return password;
    }
}