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JavaWeb网上图书商城完整项目--day02-12.激活功能各层实现

1、我们来看程序的代码

数据库层:

1、通过激活码查找到对应的用户

2、设置用户的激活状态

 

2、业务层

1、通过数据库接口通过验证码得到对应的用户

2、判断当用户是否为空,如果没有通过激活码查找到对应的用户,说明用户点击邮箱上传的激活码是无效的,这个时候说明激活失败,抛出一个业务失败异常,说明激活码无效

3、如果用户不为空,并且用户的激活状态是没有激活的,将用户的激活状态设置成true

4、如果用户不为空,但是用户的激活状态是已经激活的,抛出一个业务失败异常,提示用户无需重复激活

 

3、servlet就是调用业务层的方法进行激活,对业务层返回的异常进行处理,在界面上提示激活成功还是激活失败。我们来看程序的代码

package com.weiyuan.goods.user.dao;

import java.sql.SQLException;

import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;

import com.weiyuan.goods.user.domian.User;

import cn.itcast.jdbc.TxQueryRunner;

public class UserDao {

     //操作数据库
    private TxQueryRunner qr = new TxQueryRunner();
    
    
    /***
     * 查询用户名是否存在
     * @throws SQLException 
     */
    public boolean ajaxValidateLoginName(String loginName) throws SQLException{
        //获得满足记录的数目是对象,返回一个整数,整数是单行单列使用ScalarHandler
        String sql ="select count(*) from t_user where loginname=?";
        Number num = (Number) qr.query(sql, new ScalarHandler(),loginName);
        int count = num.intValue();

        if(count>0){
            return true;
        }
        return false;
    }
    
    /***
     * 查询邮箱是否存在
     * @throws SQLException 
     */
    public boolean ajaxValidateEmail(String email) throws SQLException{
        //获得满足记录的数目是对象,返回一个整数,整数是单行单列使用ScalarHandler
        String sql ="select count(*) from t_user where email=?";
        Number num = (Number) qr.query(sql, new ScalarHandler(),email);
        int count = num.intValue();
        System.out.println("count="+count);
        if(count>0){
            return true;
        }
        return false;
    }
    
    /***
     * 添加注册的用户
     * @throws SQLException 
     */
    public void addUser(User user) throws SQLException{
        //获得满足记录的数目是对象,返回一个整数,整数是单行单列使用ScalarHandler
        String sql ="insert into  t_user values(?,?,?,?,?,?)";
        System.out.println("user="+user.toString());
        Object[] params = {user.getUid(),user.getLoginname(),user.getLoginpass(),
                user.getEmail(),user.getStatus(),user.getActivationCode()};
        qr.update(sql, params);
    }
    
    /*
     * 通过激活码获得用户
     * */
    public User findUserByActivationCode(String activationCode) throws SQLException{
        
        String sql = "select * from t_user where activationCode = ?";
        return qr.query(sql, new BeanHandler<User>(User.class),activationCode);
    }
    
    /*
     * 设置用户的激活状态
     * */
    
    public void setUserActivationCode(String uuid,int status) throws SQLException{
        String sql = "update t_user set status = ? where uid = ? ";
        qr.update(sql,status,uuid);
    }
    
    
}

 

我们来看业务层的代码:

package com.weiyuan.goods.user.service;

import java.io.IOException;
import java.sql.SQLException;
import java.text.MessageFormat;
import java.util.Properties;

import javax.mail.MessagingException;
import javax.mail.Session;
import javax.management.RuntimeErrorException;

import cn.itcast.commons.CommonUtils;
import cn.itcast.mail.Mail;
import cn.itcast.mail.MailUtils;

import com.weiyuan.goods.user.dao.UserDao;
import com.weiyuan.goods.user.domian.User;

public class UserService {

 private UserDao dao = new UserDao();    
    
 
 public boolean ajaxValidateLoginName(String loginName) {
     
     try {
        return dao.ajaxValidateLoginName(loginName);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e.getMessage());
    }
     
 }
 
public boolean ajaxValidateEmail(String email) {
     
     try {
        return dao.ajaxValidateEmail(email);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e.getMessage());
    }
     
 }

//添加注册的用户
public void addUser(User user){
    //添加用户的uuid
    user.setUid(CommonUtils.uuid());
    //添加用户的激活码
    String activationCode = CommonUtils.uuid()+CommonUtils.uuid();
    user.setActivationCode(activationCode);
    //当前处于未激活的状态
    user.setStatus(0);//0表示未激活
    
    try {
        dao.addUser(user);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e.getMessage());
    }
    
    //向注册的用户发送邮件
     //1读取配置文件
      Properties properties = new Properties();
      try {
        properties.load(this.getClass().getClassLoader().getResourceAsStream("email_template.properties"));
    } catch (IOException e1) {
        throw new RuntimeException(e1.getMessage());
    }
    
    
     String host = properties.getProperty("host"); //qq邮箱发送邮件的地址,端口465或者587
        //qq接受邮件服务器的地址是pop.qq.com,端口995
        String username=properties.getProperty("username"); //登陆服务器的账号
        String password=properties.getProperty("password");//这里不是客户端登陆的密码,而是授权密码一定要注意
        Session session = MailUtils.createSession(host, username, password);
        //发送邮件
        String from = properties.getProperty("from");//发件人
        String to = user.getEmail();//收件人
        String title = properties.getProperty("subject");
        String content = properties.getProperty("content");
        Object [] array = new Object[]{user.getActivationCode()};   
        //替换占位符
        String formatContent = MessageFormat.format(content, user.getActivationCode());//替换占位符
        System.out.println("email content is:"+content);
        Mail mail = new Mail(from,to,title,formatContent);
        try {
            MailUtils.send(session, mail);
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        } 
    
    
    
}

/*设置用户的激活状态*/

  public void activation(String activationCode) throws Exception{
      //1 、通过激活码查找对应的用户信息
      try {
        User user = dao.findUserByActivationCode(activationCode);
        if(user == null){
            throw new Exception("无效的激活码");//业务异常,业务失败
        }
        if(user.getStatus()== 1){
            throw new Exception("用户已经既激活,不要二次激活");//业务异常,业务失败
        }
        dao.setUserActivationCode(user.getUid(), 1); //1表示激活
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e.getMessage()); // 不是业务的异常吗,而是电脑环境系统数据库的异常,直接退出线程,无法进行业务的操作了
    }
      
  }


}

我们来看servlet的代码

package com.weiyuan.goods.user.web.servlet;

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.collections.map.HashedMap;

import com.weiyuan.goods.user.domian.User;
import com.weiyuan.goods.user.service.UserService;

import cn.itcast.commons.CommonUtils;
import cn.itcast.servlet.BaseServlet;

/**
 * Servlet implementation class UserServlet
 */
@WebServlet("/UserServlet")
public class UserServlet extends BaseServlet{
    private static final long serialVersionUID = 1L;
    private UserService service = new UserService();
    /*
     * 用户注册页面使用ajax校验/*
     * 用户注册页面使用ajax校验用户名会调用该方法
     * *会调用该方法
     * */
    public String validateLoginname(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //首先获得用户上传的用户名
        String loginName = request.getParameter("loginname");
        boolean  flag = service.ajaxValidateLoginName(loginName);
        response.getWriter().print(flag);
        return null;
    }
    /*
     * 用户注册页面使用ajax校验邮箱会调用该方法
     * */
    public String validateEmail(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
       //获得用户上传的emai
    
        String email = request.getParameter("email");
        System.out.println("validateEmail is called"+email);
        boolean  flag = service.ajaxValidateEmail(email);
        response.getWriter().print(flag);
        return null;
    }
    
    /*
     * 用户注册页面使用ajax校验验证码会调用该方法
     * */
    public String validateVerifyCode(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
         //获得用户上传的verfycode
        String verifyCode  = request.getParameter("verifyCode");
        //获得session中保存的验证码
        String sessionCode = (String) request.getSession().getAttribute("vCode");
        //二者进行比较看是否相等
        System.out.println("validateVerifyCode is called"+verifyCode+":"+sessionCode);
        boolean  flag = sessionCode.equalsIgnoreCase(verifyCode);
        response.getWriter().print(flag);
        return null;
    }
    
    /*
     * 当用户从邮箱点击的激活的时候会调用该方法,并且把激活码传递过来
     * 
     * */
    public String activation(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub

        String activationCode = request.getParameter("activationCode");
        System.out.println("email activationCode is :"+activationCode);
        try {
            service.activation(activationCode);
            //激活成功
             request.setAttribute("code", "success"); //msg.jsp已经code的值来显示错误信息还是正确的信息
             request.setAttribute("msg", "激活成功");
             return "f:/jsps/msg.jsp";
        } catch (Exception e) {
           //将业务操作的异常信息在msg.jsp中显示出来
            String msg = e.getMessage();
             request.setAttribute("code", "error"); //msg.jsp已经code的值来显示错误信息还是正确的信息
             request.setAttribute("msg", msg);
             return "f:/jsps/msg.jsp";
            
        }
        
    }
    
    
    /*
     * 当用户注册的时候会调用该方法
     * 
     * */
    public String regist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        System.out.println("activation is called");
        
        //1、将请求的参数封装成User对象
                User user = CommonUtils.toBean(request.getParameterMap(), User.class);
                //2 、对传递过来的参数进行校验,把错误的信息封装到一个hashMap中
                  Map errors = validateParams(user, request);
                  if(errors.size() > 0){//说明参数错误,跳转到注册界面提示用户输入的参数有误
                      request.setAttribute("errors", errors);    
                      request.setAttribute("user", user);
                      return "f:/jsps/user/regist.jsp";
                  }
                 service.addUser(user);
                 request.setAttribute("code", "success");
                 request.setAttribute("msg", "用户注册成功,请马上到邮箱进行激活");
                  return "f:/jsps/msg.jsp";
          
    }
    
    
    public Map validateParams(User user,HttpServletRequest request){
        Map<String, String> map  = new HashedMap();
        //校验用户名
        String loginName = user.getLoginname();
        if(loginName == null || loginName.isEmpty()){
            map.put("loginname", "用户名不能为空");
        }
        if(loginName.length() < 3 || loginName.length() > 20){
            map.put("loginname", "用户名长度应该在3到20之间");
        }
        //校验用户名是否注册
        if(service.ajaxValidateLoginName(loginName)){
            map.put("loginname", "用户名已经被注册");
        }
        
        //检查登陆密码
        String loginpass = user.getLoginpass();
        if(loginpass == null || loginpass.isEmpty()){
            map.put("loginpass", "登陆密码不能为空");
        }
        if(loginpass.length() < 3 || loginpass.length() > 20){
            map.put("loginname", "登陆密码的长度应该在3到20之间");
        }
        
        //检查确认密码的信息
        //检查登陆密码
        String reloginpass = user.getReloginpass();
        if(reloginpass == null || reloginpass.isEmpty()){
            map.put("reloginpass", "登陆密码不能为空");
        }
        if(reloginpass.length() < 3 || reloginpass.length() > 20){
            map.put("reloginpass", "登陆密码的长度应该在3到20之间");
        }
        if(!reloginpass.equalsIgnoreCase(loginpass)){
            map.put("reloginpass", "两次输入的密码不一样");
        }
        
        //检查邮箱
        String email = user.getEmail();
        if(email == null || email.isEmpty()){
            map.put("email", "登陆邮箱不能为空");
        }
        //检查邮箱的格式是否正确
        if(!email.matches("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\\.[a-zA-Z0-9_-]{2,3}){1,2})$")){
            map.put("email", "邮箱格式不正确");
        }
        
        
        //检查验证码是否相等
        String verifyCode = user.getVerifyCode();
        //获得session中保存的验证码
        String sessionCode =(String) request.getSession().getAttribute("vCode");
        if(!verifyCode.equalsIgnoreCase(sessionCode)){
            map.put("verifyCode", "验证码不正确");
        }
        
        return map;
        
        
        
    }


}

对应激活这个操作:激活业务的结果就是:

激活成功

激活码无效

重复激活

三种结果

所以在业务层,如果是激活码无效和重复激活这两个业务操作失败的我们需要通过抛出异常,让外面的调用者servlet知道业务失败的原因,然后servlet对异常进行处理,在对应的界面msg.jsp中将业务操作的结果显示处理。

同时在业务操作的过程中,还存在其他异常导致业务操作失败,列如数据库的sql异常,但是这个异常不是业务本身的异常,而是数据库的异常,这个时候我们不想让servlet调用者知道,我们就直接在业务层中

  throw new RuntimeException(e.getMessage());抛出一个运行时的异常,直接退出程序。这就是
throw new RuntimeException(e.getMessage())和throw new Exception(e.getMessage())的区别。

 

JavaWeb网上图书商城完整项目--day02-12.激活功能各层实现