什么是JavaMail？
JavaMail，顾名思义，提供给开发者处理电子邮件相关的编程接口。它是Sun发布的用来处理email的API。它可以方便地执行一些常用的邮件传输。我们可以基于JavaMail开发出类似于Microsoft Outlook的应用程序。
使用JavaMail
本地邮箱服务器：1.环境搭建：
本地需要安装两个软件和一个mail.jar：
易邮邮箱服务器下载：
foxmailSetup下载
mail.jar下载
易邮邮箱服务器配置：
安装：
配置：
设置邮箱服务器：
更改为自己喜欢的域：
创建三个用户：
service：用于服务；
user01：普通用户；
user02：普通用户；
foxmail配置：
安装：
配置：
user01：
ps：由于是本地所以pop和smtp都配置成localhost
user02：
创建：
结果预览：
2.项目创建：
3.代码编写：
MailUtils.java
package com.yimocha.utils;import java.util.Properties;import javax.mail.Authenticator;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.PasswordAuthentication;import javax.mail.Session;import javax.mail.Transport;import javax.mail.Message.RecipientType;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;/*** 邮件发送工具类* * @author yimocha**/public class MailUtils {/*** 发送邮件的方法* * @param to* :给谁发邮件* @param outMessgae* ：消息内容* @throws MessagingException* @throws Exception*/public static void sendMail(String to, String outMessgae) throws Exception {// 1.创建连接对象，连接到服务器Properties props = new Properties();Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("service@", "123");//邮箱和密码}});// 2.创建邮件对象Message message = new MimeMessage(session);// 2.1 设置发件人：message.setFrom(new InternetAddress("service@"));// 2.2 设置收件人：message.setRecipient(RecipientType.TO, new InternetAddress(to));// 2.3 设置邮件的主题：message.setSubject("来自 service@ 邮件");// 2.4 设置邮件的正文：message.setContent("<h1>尊敬的用户！您的验证是:<a href=''>"+outMessgae+"</a></h1>", "text/html;charset=UTF-8");// 3.发送一份邮件Transport.send(message);}}
LocalHostTest.java
package com.yimocha.test;import com.yimocha.utils.MailUtils;import com.yimocha.utils.VerifyCodeUtils;public class LocalHostTest {public static void main(String[] args) throws Exception {// 生成随机字串String verifyCode = VerifyCodeUtils.generateVerifyCode(4);// 发送邮件MailUtils.sendMail("user02@", verifyCode);}}
VerifyCodeUtils.java
package com.yimocha.utils;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.Arrays;import java.util.Random;import javax.imageio.ImageIO;public class VerifyCodeUtils {// 使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";private static Random random = new Random();/*** 验证码对象* * @author zhou-baicheng**/public static class Verify {private String code;// 如 1 + 2private Integer value;// 如 3public String getCode() {return code;}public void setCode(String code) {this.code = code;}public Integer getValue() {return value;}public void setValue(Integer value) {this.value = value;}}/*** 使用系统默认字符源生成验证码* * @param verifySize* 验证码长度* @return*/public static Verify generateVerify() {int number1 = new Random().nextInt(10) + 1;;int number2 = new Random().nextInt(10) + 1;;Verify entity = new Verify();entity.setCode(number1 + " x " + number2);entity.setValue(number1 + number2);return entity;}/*** 使用系统默认字符源生成验证码* * @param verifySize* 验证码长度* @return*/public static String generateVerifyCode(int verifySize) {return generateVerifyCode(verifySize, VERIFY_CODES);}/*** 使用指定源生成验证码* * @param verifySize* 验证码长度* @param sources* 验证码字符源* @return*/public static String generateVerifyCode(int verifySize, String sources) {if (sources == null || sources.length() == 0) {sources = VERIFY_CODES;}int codesLen = sources.length();Random rand = new Random(System.currentTimeMillis());StringBuilder verifyCode = new StringBuilder(verifySize);for (int i = 0; i < verifySize; i++) {verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));}return verifyCode.toString();}/*** 生成随机验证码文件,并返回验证码值* * @param w* @param h* @param outputFile* @param verifySize* @return* @throws IOException*/public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException {String verifyCode = generateVerifyCode(verifySize);outputImage(w, h, outputFile, verifyCode);return verifyCode;}/*** 输出随机验证码图片流,并返回验证码值* * @param w* @param h* @param os* @param verifySize* @return* @throws IOException*/public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException {String verifyCode = generateVerifyCode(verifySize);outputImage(w, h, os, verifyCode);return verifyCode;}/*** 生成指定验证码图像文件* * @param w* @param h* @param outputFile* @param code* @throws IOException*/public static void outputImage(int w, int h, File outputFile, String code) throws IOException {if (outputFile == null) {return;}File dir = outputFile.getParentFile();if (!dir.exists()) {dir.mkdirs();}try {outputFile.createNewFile();FileOutputStream fos = new FileOutputStream(outputFile);outputImage(w, h, fos, code);fos.close();} catch (IOException e) {throw e;}}/*** 输出指定验证码图片流* * @param w* @param h* @param os* @param code* @throws IOException*/public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {int verifySize = code.length();BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);Random rand = new Random();Graphics2D g2 = image.createGraphics();g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);Color[] colors = new Color[5];Color[] colorSpaces = new Color[] {Color.WHITE, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA,Color.ORANGE, Color.PINK, Color.YELLOW };float[] fractions = new float[colors.length];for (int i = 0; i < colors.length; i++) {colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];fractions[i] = rand.nextFloat();}Arrays.sort(fractions);g2.setColor(Color.GRAY);// 设置边框色g2.fillRect(0, 0, w, h);Color c = getRandColor(200, 250);g2.setColor(c);// 设置背景色g2.fillRect(0, 2, w, h - 4);// 绘制干扰线Random random = new Random();g2.setColor(getRandColor(160, 200));// 设置线条的颜色for (int i = 0; i < 20; i++) {int x = random.nextInt(w - 1);int y = random.nextInt(h - 1);int xl = random.nextInt(6) + 1;int yl = random.nextInt(12) + 1;g2.drawLine(x, y, x + xl + 40, y + yl + 20);}// 添加噪点float yawpRate = 0.05f;// 噪声率int area = (int) (yawpRate * w * h);for (int i = 0; i < area; i++) {int x = random.nextInt(w);int y = random.nextInt(h);int rgb = getRandomIntColor();image.setRGB(x, y, rgb);}shear(g2, w, h, c);// 使图片扭曲g2.setColor(getRandColor(100, 160));int fontSize = h - 4;Font font = new Font("Algerian", Font.ITALIC, fontSize);g2.setFont(font);char[] chars = code.toCharArray();for (int i = 0; i < verifySize; i++) {AffineTransform affine = new AffineTransform();affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1),(w / verifySize) * i + fontSize / 2, h / 2);g2.setTransform(affine);g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + fontSize / 2 - 10);}g2.dispose();ImageIO.write(image, "jpg", os);}private static Color getRandColor(int fc, int bc) {if (fc > 255)fc = 255;if (bc > 255)bc = 255;int r = fc + random.nextInt(bc - fc);int g = fc + random.nextInt(bc - fc);int b = fc + random.nextInt(bc - fc);return new Color(r, g, b);}private static int getRandomIntColor() {int[] rgb = getRandomRgb();int color = 0;for (int c : rgb) {color = color << 8;color = color | c;}return color;}private static int[] getRandomRgb() {int[] rgb = new int[3];for (int i = 0; i < 3; i++) {rgb[i] = random.nextInt(255);}return rgb;}private static void shear(Graphics g, int w1, int h1, Color color) {shearX(g, w1, h1, color);shearY(g, w1, h1, color);}private static void shearX(Graphics g, int w1, int h1, Color color) {int period = random.nextInt(2);boolean borderGap = true;int frames = 1;int phase = random.nextInt(2);for (int i = 0; i < h1; i++) {double d = (double) (period >> 1)* Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);g.copyArea(0, i, w1, 1, (int) d, 0);if (borderGap) {g.setColor(color);g.drawLine((int) d, i, 0, i);g.drawLine((int) d + w1, i, w1, i);}}}private static void shearY(Graphics g, int w1, int h1, Color color) {int period = random.nextInt(40) + 10; // 50;boolean borderGap = true;int frames = 20;int phase = 7;for (int i = 0; i < w1; i++) {double d = (double) (period >> 1)* Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);g.copyArea(i, 0, 1, h1, 0, (int) d);if (borderGap) {g.setColor(color);g.drawLine(i, (int) d, i, 0);g.drawLine(i, (int) d + h1, i, h1);}}}public static void main(String[] args) throws IOException {File dir = new File("F:/verifies");int w = 200, h = 80;for (int i = 0; i < 50; i++) {String verifyCode = generateVerifyCode(4);File file = new File(dir, verifyCode + ".jpg");outputImage(w, h, file, verifyCode);}}}
4.运行效果：
qq邮箱服务器：
1.环境搭建：
上面环境已经搭建好了
现在来开启QQ的smtp
往下拉
3.代码编写：
MailUtils
package com.yimocha.utils;import java.util.Properties;import javax.mail.Authenticator;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.PasswordAuthentication;import javax.mail.Session;import javax.mail.Transport;import javax.mail.Message.RecipientType;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;/*** 邮件发送工具类* * @author yimocha**/public class MailUtils {/*** 发送邮件的方法* * @param to* :给谁发邮件* @param outMessgae* ：消息内容* @throws MessagingException* @throws Exception*/public static void sendMail(String to, String outMessgae) throws Exception {// 1.创建连接对象，连接到服务器Properties props = new Properties();props.put("mail.smtp.host", ""); // qq//props.setProperty("mail.transport.protocol", "smtp"); // props.setProperty("mail.smtp.auth", "true");//props.put("mail.smtp.port", "25");props.setProperty("mail.debug", "true");Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("XXX@", "bkajmaytlrdhdhdc");}});// 2.创建邮件对象Message message = new MimeMessage(session);// 2.1 设置发件人：message.setFrom(new InternetAddress("XXX@"));// 2.2 设置收件人：message.setRecipient(RecipientType.TO, new InternetAddress(to));// 2.3 设置邮件的主题：message.setSubject("来自 XXX@ 的邮件");// 2.4 设置邮件的正文：message.setContent("<h1>尊敬的用户！您的验证是:<a href=''>" + outMessgae + "</a></h1>", "text/html;charset=UTF-8");// 3.发送一份邮件Transport.send(message);}}
LocalHostTest.java
4.运行效果：
网易邮箱服务器：
1.环境搭建：
首先启用网易邮箱的pops / smtp
按照网易的提示，进行激活，我的已经激活了。
3.代码编写：
MailUtils.java
package com.yimocha.utils;import java.util.Properties;import javax.mail.Authenticator;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.PasswordAuthentication;import javax.mail.Session;import javax.mail.Transport;import javax.mail.Message.RecipientType;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;/*** 邮件发送工具类* * @author yimocha**/public class MailUtils {/*** 发送邮件的方法* * @param to* :给谁发邮件* @param outMessgae* ：消息内容* @throws MessagingException* @throws Exception*/public static void sendMail(String to, String outMessgae) throws Exception {// 1.创建连接对象，连接到服务器Properties props = new Properties();props.setProperty("mail.debug", "true");// 开启debug调试props.setProperty("mail.smtp.auth", "true");// 发送服务器需要身份验证props.setProperty("mail.host", "");// 设置邮件服务器主机名props.setProperty("mail.transport.protocol", "smtp");// 发送邮件协议名称Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("yimatcha@", "你的授权密码");}});// 2.创建邮件对象Message message = new MimeMessage(session);// 2.1 设置发件人：message.setFrom(new InternetAddress("yimatcha@"));// 2.2 设置收件人：message.setRecipient(RecipientType.TO, new InternetAddress(to));// 2.3 设置邮件的主题：message.setSubject("来自 yimatcha@ 的邮件");// 2.4 设置邮件的正文：message.setContent("<h1>尊敬的用户！您的验证是:<a href=''>" + outMessgae + "</a></h1>", "text/html;charset=UTF-8");// 3.发送一份邮件Transport.send(message);}}
4.运行效果：
阿里云企业邮箱服务器：
1.环境搭建：
首先您需要有阿里云企业账号：
注册邮箱，购买主机送免费的企业邮箱
mail.host：表示的是企业邮箱 如 ：smtp.zhshx.top--解释-- smtp.企业邮箱
阿里云企业邮箱默认用户是
购买的主机，需要激活；
详情可参考这篇Lovnx的博客
3.代码编写：
MailUtils.java
package com.yimocha.utils;import java.util.Properties;import javax.mail.Authenticator;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.PasswordAuthentication;import javax.mail.Session;import javax.mail.Transport;import javax.mail.Message.RecipientType;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;/*** 邮件发送工具类* * @author yimocha**/public class MailUtils {/*** 发送邮件的方法* * @param to* :给谁发邮件* @param outMessgae* ：消息内容* @throws MessagingException* @throws Exception*/public static void sendMail(String to, String outMessgae) throws Exception {// 1.创建连接对象，连接到服务器Properties props = new Properties();props.setProperty("mail.debug", "true");// 开启debug调试props.setProperty("mail.smtp.auth", "true");// 发送服务器需要身份验证props.setProperty("mail.host", "smtp.zhshx.top");// 设置邮件服务器主机名props.setProperty("mail.transport.protocol", "smtp");// 发送邮件协议名称Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("service@zhshx.top", "您的企业邮箱密码");}});// 2.创建邮件对象Message message = new MimeMessage(session);// 2.1 设置发件人：message.setFrom(new InternetAddress("service@zhshx.top"));// 2.2 设置收件人：message.setRecipient(RecipientType.TO, new InternetAddress(to));// 2.3 设置邮件的主题：message.setSubject("来自 service@zhshx.top 的邮件");// 2.4 设置邮件的正文：message.setContent("<h1>尊敬的用户！您的验证是:<a href=''>" + outMessgae + "</a></h1>", "text/html;charset=UTF-8");// 3.发送一份邮件Transport.send(message);}}
