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JavaWeb学习——邮件发送Web版

首先我们先导入jar包，其中有servlet的包也有mail的包

package com.muhan.pojo;public class User {    private String username;    private String password;    private String userMail;    public User() {    }    public User(String username, String password, String userMail) {        this.username = username;        this.password = password;        this.userMail = userMail;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getUserMail() {        return userMail;    }    public void setUserMail(String userMail) {        this.userMail = userMail;    }    @Override    public String toString() {        return "User{" +                "username='" + username + '\'' +                ", password='" + password + '\'' +                ", userMail='" + userMail + '\'' +                '}';    }}

然后再将邮件发送的代码提取成一个工具类：

package com.muhan.utils;import com.muhan.pojo.User;import com.sun.mail.util.MailSSLSocketFactory;import javax.mail.*;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.security.GeneralSecurityException;import java.util.Properties;public class SendMail extends Thread {    //发件人邮箱    private String emilTo = "462447812@qq.com";    //收件人信息    private String username = "462447812@qq.com";    //邮箱密码    private String password = "euwawaosjlnobhcg";    //邮件服务器地址    private String host ="smtp.qq.com";    //收件人信息    private User user;    public SendMail(User user){        this.user=user;    }    @Override    public void run() {        Properties properties = new Properties();        properties.setProperty("mail.host",host);        properties.setProperty("mail.transport.protocol","smtp");        properties.setProperty("mail.smtp.auth","true");        // 关于QQ邮箱，还要设置SSL加密，加上以下代码即可        try {            MailSSLSocketFactory sf = new MailSSLSocketFactory();            sf.setTrustAllHosts(true);            properties.put("mail.smtp.ssl.enable", "true");            properties.put("mail.smtp.ssl.socketFactory", sf);        } catch (GeneralSecurityException e) {            e.printStackTrace();        }        System.out.println("=============准备工作完成===============");        //1.创建一个session会话对象        Session session = Session.getDefaultInstance(properties, new Authenticator() {            @Override            public PasswordAuthentication getPasswordAuthentication() {                return new PasswordAuthentication(username, password);            }        });        //开启Session的debug模式，这样就可以查看到程序发送Email的运行状态        session.setDebug(true);        //2.获取连接对象，通过session对象获得transport，需要捕获或者抛出异常        Transport transport = null;        try {            transport = session.getTransport();        } catch (NoSuchProviderException e) {            e.printStackTrace();        }        //3.连接服务器        try {            transport.connect(host,username,password);            //4.发送邮件            sendText(session,transport);            //5.关闭连接            transport.close();        } catch (MessagingException e) {            e.printStackTrace();        }    }    private void sendText(Session session,Transport transport) throws MessagingException {        //4.1创建邮件对象        MimeMessage mimeMessage = new MimeMessage(session);        //4.2邮件发送人        mimeMessage.setFrom(new InternetAddress(username));        //4.3邮件收件人，可以发送多人        mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress(user.getUserMail()));        //4.4邮件标题        mimeMessage.setSubject("用户注册邮件");        String info="恭喜您注册成功,您的用户名："+user.getUsername()+",您的密码为："+user.getPassword()+",请妥善保管，如有疑问请联系网站客服";        //4.5邮件内容        mimeMessage.setContent(info,"text/html;charset=utf-8");        transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());    }}

为了防止乱码，我们再写个过滤器：

package com.muhan.filter;import javax.servlet.*;import java.io.IOException;public class CharSetFilter  implements Filter {    @Override    public void init(FilterConfig filterConfig) throws ServletException {    }    @Override    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain filterChain) throws IOException, ServletException {        req.setCharacterEncoding("utf-8");        resp.setCharacterEncoding("utf-8");        filterChain.doFilter(req,resp);    }    @Override    public void destroy() {    }}

编写前端JSP页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>            点击注册！！  

2.注册页面register.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>    
   
    
    
用户名：
    
    
密码：
    
    
收件人邮箱：
    
    
    
   

3.注册成功跳转页面info.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>    <%=request.getAttribute("message")%>

配置Web.xml

   
           
            
     
      RegisterServlet
             
     
      com.muhan.servlet.RegisterServlet
         
            
            
     
      RegisterServlet
             
     
      /q
         
        
            
     
      CharSet
             
     
      com.muhan.filter.CharSetFilter
         
        
            
     
      CharSet
             
     
      /*
         
    
   

编写Servlet

package com.muhan.servlet;import com.muhan.pojo.User;import com.muhan.utils.SendMail;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class RegisterServlet extends javax.servlet.http.HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        doPost(req,resp);    }    @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        //接收前端的请求，封装成对象        String username = req.getParameter("username");        String password = req.getParameter("password");        String email = req.getParameter("email");        User user = new User(username,password,email);        //用户注册成功后，给用户发送一封邮件        //使用线程来专门发送邮件，防止出现耗时，和网站注册人数过多的情况        SendMail send = new SendMail(user);        //启动线程        send.start();        //注册用户        req.setAttribute("message","注册成功，我们已经发送了一封邮件给您，请查收！如网络不稳定，请稍等！");        req.getRequestDispatcher("info.jsp").forward(req,resp);    }}

最后配置Tomcat

项目结构展示：

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