java邮箱实现忘记修改密码

一、spring-boot-starter-mail发送邮件(发送邮箱需要开启服务)
1.添加依赖

<!--        邮件--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId></dependency>

2.application.yml中配置

  mail:test-connection: truehost: kkk.comport: 25username: 2222222.compassword: 22222default-encoding: utf-8protocol: smtpemailFrom: 2222222.com

3.自定义配置类

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;@Component
@ConfigurationProperties(prefix = "spring.mail")
public class EmailConfig {private String emailFrom;public String getEmailFrom() {return emailFrom;}public void setEmailFrom(String emailFrom) {this.emailFrom = emailFrom;}}

3.service代码

package com.pcr.user.service;import javafx.util.Pair;import java.io.File;
import java.util.List;/*** @author zyn* @date now*/
public interface EmailService {/*** 发送简单邮件* @param to 收件人地址* @param subject  邮件标题* @param content 邮件内容*/public void sendSimpleMail(String[] to, String subject, String content);/*** 发送简单邮件* @param to 收件人地址* @param subject  邮件标题* @param content 邮件内容* @param attachments<文件名附件> 附件列表*/public void sendAttachmentsMail(String[] to, String subject, String content, List<Pair<String, File>> attachments);/*** 发送html格式邮件* @param subject 主题* @param content 内容*/public void sendHtmlMail(String to , String subject, String content);//    /**
//     * 发送模板邮件
//     * @param to 收件人地址
//     * @param subject  邮件标题
//     * @param content<key内容> 邮件内容
//     * @param attachments<文件名附件> 附件列表
//     */
//    public void sendTemplateMail(String[] to, String subject, Map<String, Object> content, List<Pair<String, File>> attachments);
}

package com.pcr.user.service.impl;import com.pcr.user.config.EmailConfig;
import com.pcr.user.service.EmailService;
import javafx.util.Pair;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.List;/*** @Author zyn* @Version 1.0.0* @Date 2020-02-15 21:31*/
@Service
public class EmailServiceImpl implements EmailService {@Autowiredprivate EmailConfig emailConfig;@Autowiredprivate JavaMailSender mailSender;/*** 用来发送模版邮件*/
//    @Autowired
//    private TemplateEngine templateEngine;@Overridepublic void sendSimpleMail(String[] to, String subject, String  content) {SimpleMailMessage message = new SimpleMailMessage();message.setFrom(emailConfig.getEmailFrom());message.setTo(to);message.setSubject(subject);message.setText(content);mailSender.send(message);}@Overridepublic void sendAttachmentsMail(String[] to, String subject, String content, List<Pair<String, File>> attachments) {MimeMessage message = mailSender.createMimeMessage();MimeMessageHelper helper = null;try {helper = new MimeMessageHelper(message, true);helper.setFrom(emailConfig.getEmailFrom());helper.setTo(to);helper.setSubject(subject);helper.setText(content, true);if(attachments != null){for(Pair<String,File> attachment:attachments){FileSystemResource file = new FileSystemResource(attachment.getValue());helper.addAttachment(attachment.getKey(), file);}}mailSender.send(message);} catch (Exception e) {e.printStackTrace();}}@Overridepublic void sendHtmlMail(String to, String subject, String content) {MimeMessage message = mailSender.createMimeMessage();try {//true表示需要创建一个multipart messageMimeMessageHelper helper = new MimeMessageHelper(message, true);helper.setFrom(emailConfig.getEmailFrom());helper.setTo(to);helper.setSubject(subject);helper.setText(content, true);mailSender.send(message);System.out.println("html格式邮件发送成功");} catch (Exception e) {System.out.println("html格式邮件发送失败");}}//    @Override
//    public void sendTemplateMail(String[] to, String subject, Map<String, Object> content, List<Pair<String, File>> attachments) {
//        Context context = new Context();
//        context.setVariables(content);
//        String emailContent = templateEngine.process("mail", context);
//        sendAttachmentsMail(to,subject,emailContent,attachments);
//    }
}

二、发送修改密码连接
1.连接需要加密和时效验证

http://192.168.9.6:8080/#/modifypwd?key=0e01fe12f88fcb38d97cc4a7e8fa9c921d6bb27b430bceac12579a8dbd6094e4

key中保存的是用户名+当前时间戳用于验证用户和链接有效期时长
我采用的是Des加密解密

String context = "你好:<br/>您收到这封邮件是因为您申请了一个修改密码的请求。<br/>您可以点击如下链接设置您的密码，如果点击无效，请复制到浏览器中:<br/>"+link+"<br/>该链接十分钟内有效<br/>如果您有疑问，请给我们联系";if (StringUtils.isEmpty(user.getEmail())) {throw new Exception("邮箱不能为空");}if (!user1.getEmail().equals(user.getEmail())) {throw new Exception("此邮箱不是该用户的注册邮箱");}emailService.sendHtmlMail(user.getEmail(), "修改密码", context);

DES加密工具类

package com.pcr.commom.util;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.SecureRandom;
import java.util.Date;public class DESUtil {private final static String HEX = "0123456789abcdef";private static void appendHex(StringBuffer sb, byte b) {sb.append(HEX.charAt((b >> 4) & 0x0f)).append(HEX.charAt(b & 0x0f));}/*** 解密** @param raw       key* @param encrypted 加密后的字节* @return 返回解密后的字节* @throws Exception*/private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {SecretKeySpec skeySpec = new SecretKeySpec(raw, "DES");Cipher cipher = Cipher.getInstance("DES");cipher.init(Cipher.DECRYPT_MODE, skeySpec);byte[] decrypted = cipher.doFinal(encrypted);return decrypted;}/*** 解密** @param seed      key* @param encrypted 加密的字符* @return 返回解密的字符* @throws Exception*/public static String decrypt(String seed, String encrypted) throws Exception {byte[] rawKey = getRawKey(seed.getBytes());byte[] enc = toByte(encrypted);byte[] result = decrypt(rawKey, enc);return new String(result);}/*** 加密** @param raw   key* @param clear* @return* @throws Exception*/private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {SecretKeySpec skeySpec = new SecretKeySpec(raw, "DES");Cipher cipher = Cipher.getInstance("DES");cipher.init(Cipher.ENCRYPT_MODE, skeySpec);byte[] encrypted = cipher.doFinal(clear);return encrypted;}/*** 加密** @param seed      key* @param cleartext 需要加密的字符串* @return 返回加密的字符* @throws Exception*/public static String encrypt(String seed, String cleartext) throws Exception {byte[] rawKey = getRawKey(seed.getBytes());byte[] result = encrypt(rawKey, cleartext.getBytes());return toHex(result);}public static String fromHex(String hex) {return new String(toByte(hex));}/*** key 加密** @param seed* @return* @throws Exception*/private static byte[] getRawKey(byte[] seed) throws Exception {KeyGenerator kgen = KeyGenerator.getInstance("DES");SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");sr.setSeed(seed);kgen.init(56, sr); // des 的密钥为56位SecretKey skey = kgen.generateKey();byte[] raw = skey.getEncoded();return raw;}/*** to byte** @param hexString* @return*/public static byte[] toByte(String hexString) {int len = hexString.length() / 2;byte[] result = new byte[len];for (int i = 0; i < len; i++)result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();return result;}/*** 转为为16进制** @param buf 需要转化的byte* @return 返回转化后的字符串*/public static String toHex(byte[] buf) {if (buf == null)return "";StringBuffer result = new StringBuffer(2 * buf.length);for (int i = 0; i < buf.length; i++) {appendHex(result, buf[i]);}return result.toString();}/*** 转为为16进制** @param buf 需要转化的byte* @return 返回转化后的字符串*/public static String toHex(String txt) {return toHex(txt.getBytes());}public static void main(String[] args) throws Exception {String seed = "LOVEMOIVE"; // des加密时使用的keyDate date = new Date(); // 获取当前时间long time = date.getTime();String plainText = "" + time + "@" + "1432531621@qq.com"; // 组装时间和用户邮箱String c = DESUtil.encrypt(seed, plainText); // 加密参数String link = "http://localhost:8080/LoveMovie/forgetPassword/resetPassword?key=" + c;System.out.println("-----------解密后的链接为---------------------");System.out.println(link);//----------在用户登录邮箱访问重置密码链接后对链接的参数进行解密------String p = DESUtil.decrypt(seed, c);System.out.println("-----------解密后的key参数---------------------");System.out.println(p);}/*output:-----------解密后的链接为---------------------http://localhost:8080/LoveMovie/forgetPassword/resetPassword?key=86bfd878ab98b8dcc16f07f29b212a6bf5221568a680766ac900978672e6fdfc-----------解密后的key参数---------------------1561115711489@1432531621@qq.com*/}

2.解密验证

String p = DESUtil.decrypt(key, userVo.getKey());int i = p.indexOf("@");String timestamp = p.substring(0, i);String username = p.substring(i + 1);if (!StringUtils.isNotBlank(timestamp)) {throw new Exception("解密失败");}if (!StringUtils.isNotBlank(username)) {throw new Exception("解密失败");}long time = Long.parseLong(timestamp);long  difference = (System.currentTimeMillis()-time)/1000/60;long min = 10L;if (difference > min) {throw new Exception("链接超过十分钟已失效");}if (!userVo.getUserName().equals(username)) {throw new Exception("请填写正确的用户");}

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