1、獲取表中最后一條數據

public static String demo() throws SQLException { String sql = 'select * FROM baoxiu ORDER BY id DESC LIMIT 0,1;'; PreparedStatement ptmt = conn.prepareStatement(sql); ResultSet rs = ptmt.executeQuery(); String str=null; if(rs.next()) { str= rs.getString('bt'); } return str; }

2、使用模糊查詢，獲取符合條件的所有數據

public static List<DuibiModel> getBaoX(String bt) throws SQLException { String sql = 'select bt,`user`.cardid,phone FROM baoxiu,`user` WHERE baoxiu.cardid=`user`.cardid AND bt LIKE ’%'+bt+'%’'; PreparedStatement ptmt = conn.prepareStatement(sql); ResultSet rs = ptmt.executeQuery(); List<DuibiModel> list = new ArrayList<>() ; while(rs.next()) { DuibiModel duibi=new DuibiModel(); duibi.setBt(rs.getString('bt')); duibi.setCardid(rs.getString('cardid')); duibi.setPhone(rs.getString('phone')); list.add(duibi); } return list; }

3、Java 發送郵件

import javax.mail.Authenticator;import javax.mail.PasswordAuthentication; public class Auth extends Authenticator { private String username = ''; private String password = ''; public Auth(String username, String password) { this.username = username; this.password = password; } public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(username, password); } }import java.util.Properties;import javax.mail.Message;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;public class SendMail { private Properties props; //系統屬性 private Session mailSession; //郵件會話對象 private MimeMessage mimeMsg; //MIME郵件對象 public SendMail(String SMTPHost, String Port, String MailUsername, String MailPassword) { Auth au = new Auth(MailUsername, MailPassword); //設置系統屬性 props=java.lang.System.getProperties(); //獲得系統屬性對象 props.put('mail.smtp.host', SMTPHost); //設置SMTP主機 props.put('mail.smtp.port', Port); //設置服務端口號 props.put('mail.smtp.auth', 'true'); //同時通過驗證 //獲得郵件會話對象 mailSession = Session.getInstance(props, au); } public boolean sendingMimeMail(String MailFrom, String MailTo, String MailCopyTo, String MailBCopyTo, String MailSubject, String MailBody) { try { //創建MIME郵件對象 mimeMsg=new MimeMessage(mailSession); //設置發信人 mimeMsg.setFrom(new InternetAddress(MailFrom)); //設置收信人 if(MailTo!=null){ mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(MailTo)); } //設置抄送人 if(MailCopyTo!=null){ mimeMsg.setRecipients(javax.mail.Message.RecipientType.CC,InternetAddress.parse(MailCopyTo)); } //設置暗送人 if(MailBCopyTo!=null){ mimeMsg.setRecipients(javax.mail.Message.RecipientType.BCC,InternetAddress.parse(MailBCopyTo)); } //設置郵件主題 mimeMsg.setSubject(MailSubject,'utf-8'); //設置郵件內容，將郵件body部分轉化為HTML格式 mimeMsg.setContent(MailBody,'text/html;charset=utf-8'); //發送郵件 Transport.send(mimeMsg); return true; } catch (Exception e) { e.printStackTrace(); return false; } }}public static boolean email(String email,String str) { String SMTPHost='smtp.qq.com'; String Port='25'; String MailUsername='gkh35@foxmail.com'; //直接用我的郵件進行發送測試 String MailPassword='wggddlvcrqfubhde'; //密碼請勿修改 SendMail sendMail=new SendMail(SMTPHost,Port,MailUsername,MailPassword); String MailFrom='gkh35@foxmail.com'; //發件人 String MailTo=email; //收件人 String MailCopyTo=null; //抄送人 String MailBCopyTo=null; //暗送人 String MailSubject='發現類似商品'; //郵件主題 String MailBody=str; //郵件內容 //發送郵件 boolean isSend=sendMail.sendingMimeMail(MailFrom, MailTo, MailCopyTo, MailBCopyTo, MailSubject, MailBody); return isSend;}

4、main方法

public static void main(String[] args) throws SQLException { boolean flag = false; String str=demo(); for(DuibiModel duibiModel : getBaoX(str)) { System.out.println('名稱為:'+duibiModel.getBt()+','+'身份證號：'+duibiModel.getCardid()+','+'電話號碼為：'+duibiModel.getPhone()); flag=email('gkh8299@gmail.com', duibiModel.getBt()); } if(flag) { System.out.println('郵件發送成功'); }else { System.out.println('郵件發送失敗'); }}

總結

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