如何在java程式裡面發送html郵件__html

都快趕上每年一貼了，年年都有孩子們問我怎麼在java程式裡面發郵件，特別是html格式的郵件，在這裡貼個例子吧：

maven裡面引入javamail 

        <dependency>            <groupId>javax.mail</groupId>            <artifactId>mail</artifactId>            <version>1.4.7</version>        </dependency>

然後寫個簡單的工具類

package com.xxx.tools;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeUtility;public class HtmlEmail {    private String smtpServer;    private String username;    private String password;    public void sendMessage(String to, String subject, String messageText) throws MessagingException, java.io.UnsupportedEncodingException {        java.util.Properties props = new java.util.Properties();        props.setProperty("mail.smtp.auth", "true");//指定是否需要SMTP驗證        props.setProperty("mail.smtp.host", smtpServer);//指定SMTP伺服器        props.put("mail.transport.protocol", "smtp");        Session mailSession = Session.getDefaultInstance(props);        //mailSession.setDebug(true);//是否在控制台顯示debug資訊        InternetAddress fromAddress = new InternetAddress(username);        InternetAddress toAddress = new InternetAddress(to);        MimeMessage emailMessage = new MimeMessage(mailSession);        emailMessage.setFrom(fromAddress);        emailMessage.addRecipient(javax.mail.Message.RecipientType.TO, toAddress);        emailMessage.setSentDate(new java.util.Date());        emailMessage.setSubject(MimeUtility.encodeText(subject, "utf-8", "B"));        emailMessage.setContent(messageText, "text/html;charset=utf-8");                Transport transport = mailSession.getTransport("smtp");        transport.connect(smtpServer, username, password);        transport.sendMessage(emailMessage, emailMessage.getAllRecipients());        transport.close();    }    public String getSmtpServer() {        return smtpServer;    }    public void setSmtpServer(String smtpServer) {        this.smtpServer = smtpServer;    }    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;    }}

然後在spring裡面配置一下

    <bean id="htmlMail" class="com.xxx.tools.HtmlEmail">        <property name="smtpServer" value="smtp.qq.com"/>        <property name="username" value="1xxxx7@qq.com"></property>        <property name="password" value="xxxxxxx"></property>    </bean>

然後在需要使用的地方使用：

@Controller@RequestMapping("/user")public class UserRegController {    @Resource    private HtmlEmail email;    @RequestMapping("/reg")    public void sendMail(@RequestParam("username") String username, @RequestParam("userpass") String userpass, @RequestParam("email") String email_addr, HttpServletRequest request) {        String valid_string = request.getSession(true).getId();        String valid_url = "<a href='http://localhost:8080/user/valid?username=" + username + "&validString=" + valid_string + "' target='_blank'> 點擊此連結啟用帳號</a>";        try {            email.sendMessage(email_addr, "使用者啟用", valid_url);        } catch (MessagingException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }    }