JAVA Email-编程知识

Email就是电子邮件。电子邮件的应用已经有几十年的历史了，我们熟悉的邮箱地址比如aaaa22222@163.com，邮件软件比如Outlook、网易闪电邮、Foxmail都是用来收发邮件的。当然，使用Java程序也可以收发电子邮件。

传统的邮件就是通过邮局投递，然后从一个邮局到另一个邮局，最终到达用户的邮箱。电子邮件的发送也是类似的，

java Email首先需要导一个包：javax.mail-1.6.2.jar

yan

可以自己创建一个工具类，便于每次的使用，预防每一次都需要重复很多东西！类似于这样：

import java.util.Properties;import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;//工具类
public class JavaMailUtils {private JavaMailUtils() {}public static Session createSession() {//邮箱账号信息String userName = "19584XXX@qq.com";//邮件发送账号String password = "cyhajwlbkXXxxX";//账号授权密码//SMTP服务连接器连接信息Properties props = new Properties();props.put("mail.smtp.host","smtp.qq.com");//SMTP主机名props.put("mail.smtp.post","25");//主机端口号props.put("mail.smtp.auth","true");//是否需要用户认证props.put("mail.smtp.starttls.enable","true");//启用TLS加密Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(userName, password);}});return session;}}

提示:密码必须是授权密码。。。授权密码可以在邮件设置中找到并打开！

接下来演示一则最基本的文字邮件发送。

import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;public class Demo06 {public static void main(String[] args) {try {//1.创建Session会话Session session = JavaMailUtils.createSession();//创建邮箱对象MimeMessage message = new MimeMessage(session);message.setSubject("聘请函！");message.setText("恭喜您被猿究院录取，工资详谈，手机号：13347xxxxx`4");message.setFrom(new InternetAddress("1808xxx2494@163.com"));message.setRecipient(RecipientType.TO, new InternetAddress("2232266959@qq.com"));Transport.send(message);System.out.println("1");} catch (AddressException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (MessagingException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

以及邮件加入附件照片的发送！！！


import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;import javax.activation.DataHandler;
import javax.mail.BodyPart;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.util.ByteArrayDataSource;import org.apache.xmlbeans.impl.store.Path;public class Demo07 {public static void main(String[] args) {//1.创建Session会话try {Session session = JavaMailUtils.createSession();//2.创建MimeMessage邮件对象MimeMessage message = new MimeMessage(session);message.setFrom(new InternetAddress("1958411xxx@qq.com"));//发件人message.setRecipient(RecipientType.TO, new InternetAddress("7755xxxxx6@qq.com"));//收件人message.setRecipients(RecipientType.CC, new InternetAddress[] {new InternetAddress("7755xxxxx6@qq.com")});message.setSubject("测试邮件");//邮箱仅包含正文//message.setText("sssss");//邮件包含正文也包含附件//正文BodyPart textPart = new MimeBodyPart();//textPart.setContent("太阳<p>晒屁屁<p>了","text/html;harset=utf-8");StringBuilder contentText = new StringBuilder();contentText.append("<h3>触不可及<h3>");contentText.append("<p>程47与七个小矮人的故事<p>");contentText.append("<img scr=\"cid:cbkj\"/>");textPart.setContent(contentText.toString(),"text/html;charset=utf-8");//附件BodyPart imagePart = new MimeBodyPart();//filePart.setFileName("李云龙阁下");//上传附件imagePart.setDataHandler(new DataHandler(new ByteArrayDataSource(Files.readAllBytes(Paths.get("E:\\test\\test\\DESKTOP-ILBR8QI.jpg")),"application/octet-stream")));imagePart.setHeader("Content-ID","cbkj");//图片的内容id//将正文+附件组装成Multipart对象Multipart multipart = new MimeMultipart();multipart.addBodyPart(textPart);multipart.addBodyPart(imagePart);//将Multipart对象放入邮件message.setContent(multipart);//3.发送邮件Transport.send(message);} catch (AddressException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (MessagingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

其中发送内容中可以包含超文本，但必须要在代码中说明文字中含有超文本，不然无法识别！

同时我们可以在控制台看到JavaMail打印的调试信息，在这里我就不演示了。。。

如果有收获，记得一键三连支持二锅头哦！!