package com.louis.utils;import java.math.BigInteger; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException;public class MD5Utils {/*** 使用md5加密*/public static String md5(String plainText) {byte[] secretBytes = null;try {//普通的字符串轉化成數組secretBytes = MessageDigest.getInstance("md5").digest(plainText.getBytes());} catch (NoSuchAlgorithmException e) {throw new RuntimeException("找不到md5實例");}String md5code = new BigInteger(1, secretBytes).toString(16);for (int i = 0; i < 32 - md5code.length(); i++) {md5code = "0" + md5code;}return md5code;} /* //和數據庫的加密一樣，同一個字符串通過md5加密，結果是一樣的public static void main(String[] args) {System.out.println(md5("123"));}*/ } package com.louis.web.servlet;import java.io.IOException; import java.util.Date;import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;import org.apache.commons.beanutils.BeanUtils; import org.apache.commons.beanutils.ConvertUtils;import com.louis.domain.User; import com.louis.myconvertor.MyConverter; import com.louis.service.UserService; import com.louis.service.impl.UserServiceImpl; import com.louis.utils.MD5Utils; import com.louis.utils.UUIDUtils;/*** 和用戶相關的servlet*/public class UserServlet extends BaseServlet {public String add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {System.out.println("userServlet的add方法執行了");return null;}//調轉到注冊頁面public String registUI(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {return "/jsp/register.jsp";}//完成注冊public String regist(HttpServletRequest request,HttpServletResponse response) throws Exception {//1封裝數據User user = new User();//注冊自定義轉化器ConvertUtils.register(new MyConverter(), Date.class);BeanUtils.populate(user, request.getParameterMap());//1.1設置用戶id user.setUid(UUIDUtils.getId());//1.2設置激活碼 user.setCode(UUIDUtils.getCode());//1.3加密密碼 user.setPassword(MD5Utils.md5(user.getPassword()));//2調用service完成注冊UserService service = new UserServiceImpl();service.regist(user);//頁面請求轉發request.setAttribute("msg", "用戶已注冊，請去郵箱激活");return "/jsp/msg.jsp";}}

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轉載于:https://www.cnblogs.com/Michael2397/p/7637055.html

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