java工具类之邮件工具类
import com.sun.mail.util.MailSSLSocketFactory;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
/**
* 需要加依赖
* <dependency>
* <groupId>com.sun.mail</groupId>
* <artifactId>javax.mail</artifactId>
* <version>1.5.4</version>
* </dependency>
*
* 使用方式 先调用 setMailConfig 方法配置发件箱
* 再调用 sendForeach 方法 发送邮件
*/
public class MailUtils {
//发件箱
private static String from;
//秘钥
private static String pass;
//邮件服务器
private static String host;
private static List<Map<String,String>> configList = new ArrayList();
/**
*
* @param _from 发件箱 123456@qq.com
* @param _pass 发件密码 gudsafwupxiibhjd
* @param _host 邮件服务器 smtp.qq.com
*/
public static void setMailConfig(String _from,String _pass,String _host){
//初始化
if(from==null||pass==null||host==null){
from = _from;
pass = _pass;
host = _host;
}
HashMap<String, String> map = new HashMap();
map.put("from",_from);
map.put("pass",_pass);
map.put("host",_host);
configList.add(map);
}
private static int index = 0;
/**
* @param receive 收件人
* @param subject 邮件主题
* @param msg 邮件内容
* @return
*/
public static boolean sendForeach(String receive, String subject, String msg){
return sendForeach(receive,subject,msg,null);
}
/**
*
* @param receive 收件人
* @param subject 邮件主题
* @param msg 邮件内容
* @param filename 附件地址
* @return
*
*/
public static boolean sendForeach(String receive, String subject, String msg, String filename){
return sendForeach(receive, subject, msg, filename);
}
/**
*会使用不同的发件箱发送 直到所有配置的邮箱都试过失败
* @param receive 收件人
* @param subject 邮件主题
* @param msg 邮件内容
* @param filename 附件地址
* @param reName 修改附件名
* @return 成功和失败
*
*/
public static boolean sendForeach(String receive, String subject, String msg, String filename, String reName){
if (isEmpty(receive)) {
return false;
}
boolean reBoo = true;
try {
send(receive,subject,msg,filename,reName);
} catch (Exception e) {
System.out.println(new Date()+"发送邮件失败，当前发件箱为："+from);
index++;
if(index>=configList.size()){
return false;
}
changeConfig();
reBoo = sendForeach(receive,subject,msg,filename,reName);
}
return reBoo;
}
private static boolean isEmpty(String receive) {
return receive==null||"".equals(receive);
}
private static void changeConfig() {
Map<String, String> map = configList.get(index);
from = map.get("from");
pass = map.get("pass");
host = map.get("host");
}
/**
*
* @param receive 收件人
* @param subject 邮件主题
* @param msg 邮件内容
* @param filename 附件地址
* @param reName 修改附件名称
* @return
*
*/
private static boolean send(String receive, String subject, String msg, String filename, String reName)
throws Exception {
if (isEmpty(receive)) {
return false;
}
if(configList.size()==0){
return false;
}
// 获取系统属性
Properties properties = System.getProperties();
// 设置邮件服务器
properties.setProperty("mail.smtp.host", host);
properties.put("mail.smtp.auth", "true");
MailSSLSocketFactory sf = new MailSSLSocketFactory();
sf.setTrustAllHosts(true);
properties.put("mail.smtp.ssl.enable", "true");
properties.put("mail.smtp.ssl.socketFactory", sf);
// 获取默认session对象
Session session = Session.getDefaultInstance(properties, new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() { // qq邮箱服务器账户、第三方登录授权码
return new PasswordAuthentication(from, pass); // 发件人邮件用户名、密码
}
});
// 创建默认的 MimeMessage 对象
MimeMessage message = new MimeMessage(session);
// Set From: 头部头字段
message.setFrom(new InternetAddress(from));
// Set To: 头部头字段
message.addRecipient(Message.RecipientType.TO, new InternetAddress(receive));
// Set Subject: 主题文字
message.setSubject(subject);
// 创建消息部分
BodyPart messageBodyPart = new MimeBodyPart();
// 消息
messageBodyPart.setText(msg);
// 创建多重消息
Multipart multipart = new MimeMultipart();
// 设置文本消息部分
multipart.addBodyPart(messageBodyPart);
if(!isEmpty(filename)){
// 附件部分
messageBodyPart = new MimeBodyPart();
// 设置要发送附件的文件路径
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
// messageBodyPart.setFileName(filename);
// 处理附件名称中文（附带文件路径）乱码问题
String fileName = MimeUtility.encodeText(source.getName());
if(!isEmpty(reName)){
fileName = reName;
}
messageBodyPart.setFileName(fileName);
multipart.addBodyPart(messageBodyPart);
}
// 发送完整消息
message.setContent(multipart);
// 发送消息
Transport.send(message);
return true;
}
//示例代码 你需要去得到 pass
public static void main(String[] args) {
setMailConfig("123456@qq.com","gudsafwupxiibhjd","smtp.qq.com");
setMailConfig("932326@qq.com","gudsafwupxiibhjd","smtp.qq.com");
String receive="123456@qq.com";
String subject ="标题";
String msg ="邮件的正文内容";
String filename ="D:\myHome\2021-08-10.xlsx";
filename = null;
boolean b = sendForeach(receive, subject, msg, filename,"123.xlsx");
System.out.println(b);
}
}