ssm框架搭建的MD5加密网站

package com.cn.hnust.model; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import javax.annotation.Resource; import org.springframework.stereotype.Component; import com.cn.hnust.dao.IMd5PwdDao; import com.cn.hnust.entity.md5Pwd; @Component public class Md5PwdModel { @Resource private IMd5PwdDao md5PwdDao; public md5Pwd listByContent(String content){ md5Pwd md5=md5PwdDao.selectByContent(content); if(md5==null){ md5Pwd newMd5=new md5Pwd(); newMd5.setThirtytwoBits(getMD5_32bits(content)); newMd5.setSixteenBits(getMD5_16bits(content)); newMd5.setContent(content); md5PwdDao.insertSelective(newMd5); md5=newMd5; } return md5; } public Integer insert(md5Pwd md5){ return md5PwdDao.insertSelective(md5); } private String getMD5_16bits(String str) { return getMD5_32bits(str).substring(8, 24); } private String getMD5_32bits(String str) { MessageDigest md=null; try { md = MessageDigest.getInstance("MD5"); byte[] md5Bytes = md.digest(str.getBytes()); StringBuffer hexValue = new StringBuffer(); for (int i = 0; i < md5Bytes.length; i++) { int val = ((int) md5Bytes[i]) & 0xff; if (val < 16) hexValue.append("0"); hexValue.append(Integer.toHexString(val)); } str = hexValue.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return str; } }