Util

 

Constant.java

public class Constant {
 //提高可读性
 public static final int  NORMAL_LEVEL = 1;//普通
 public static final int  HIGHT_LEVEL = 2;//高级
 public static final int  VIP_LEVEL = 3;//VIP
 //处理结果
 public static final int  EXECUTE_OK = 0; //成功
 public static final int  EXECUTE_FAIL = 1; //失败
 
 //向Session存放的key,避免冲突
 public static final String USER_KEY =
        "com.dang.user";
 public static final String CART_KEY =
        "com.dang.cart";
 
}

=================================================

VerifyCodeUtils.java 文件

package org.dang.action.util;

import java.util.UUID;

/**
 * 邮箱验证码工具类
 * @author Administrator
 *
 */
public class VerifyCodeUtils {
 /**
  * 生成UUID
  * @return
  */
 public static String generateCode() {
  UUID uuid = UUID.randomUUID();
  return uuid.toString() ;
 }

 /**
  * 获取邮箱验证码的UUID部分
  * @param input
  * @return
  */
 public static String getUUID(String input) {
  if (input == null)
   return null;
  if (input.lastIndexOf("_") < 0)
   return null;
  return input.substring(0, input.lastIndexOf("_"));
 }
 
 /**
  * 获取用户ID
  * @param input
  * @return
  */
 public static Integer getUserId(String input) {
  if (input == null)
   return null;
  if (input.lastIndexOf("_") < 0)
   return null;
  return Integer.valueOf(input.substring(input.lastIndexOf("_") + 1));
 }
 
 public static void main(String[] args){
  System.out.println(generateCode());
  System.out.println(generateCode());
 }
}

=================================================

MD5加密算法

MD5Utils.java

public class MD5Utils {
 public static String md5(String str) {
  try {
   //首先利用MD5算法将密码加密,变成等长字节
   MessageDigest md = MessageDigest.getInstance("MD5");
   byte[] b1 = md.digest(str.getBytes());
   //将等长字节利用Base64算法转换成字符串
   BASE64Encoder encoder = new BASE64Encoder();
   return encoder.encode(b1);
  } catch (Exception e) {
   return null;
  }

 }
 

===============================================

EmailUtils.java 文件

public class EmailUtils {
 public static int sendEmail(String code,String email){
  System.out.println("给"+email+"发送了邮箱验证码");
  System.out.println("验证码为:"+code);
  //TODO 邮件发送
  return Constant.EXECUTE_OK;
 }
}

 

 ================================================

DBUtil.java 连接池

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSourceFactory;

 

public class DBUtil {
 //连接池对象
 private static DataSource dataSource;
 //负责将connection与当前执行线程绑定
 private static ThreadLocal<Connection> connLocal= new ThreadLocal<Connection>();
 
 static {
  try {
  Properties props = new Properties();
  props.load(DBUtil.class.getClassLoader().getResourceAsStream("dbcp.properties"));
   dataSource = BasicDataSourceFactory.createDataSource(props);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
 
 public static Connection openConnection()throws SQLException{
  Connection conn = connLocal.get();
  if(conn == null){
   conn = dataSource.getConnection();
   connLocal.set(conn);
  }
  return conn;
 }
 
 public static void closeConnection() throws SQLException{
  Connection conn = connLocal.get();
  connLocal.set(null);
  if(conn != null && !conn.isClosed()){
   conn.close();
  }
 }
 
 
 
 
}