import java.io.Serializable;  /**  * 郵件實體類  */  public class Mail implements Serializable {   /**   * 序列號   */  private static final long serialVersionUID = -3562218214168975242L;  /**   * 郵件編碼s   */  public static final String ENCODEING = "UTF-8";   /**   * 服務器地址   */  private String host;  /**   * 服務器端口號   */  private String portNumber;   /**   * 發件人的郵箱   */  private String sender;   /**   * 收件人的郵箱   */   private String receiver;   /**   * 發件人昵稱   */   private String name;   /**   * 賬號   */   private String username;   /**   * 密碼   */   private String password;   /**   * 主題   */  private String subject;  /**   * 信息(支持HTML)   */  private String message;     public String getHost() {    return host;   }     public void setHost(String host) {    this.host = host;   }     public String getSender() {    return sender;   }     public String getPortNumber() {   return portNumber;  }   public void setPortNumber(String portNumber) {   this.portNumber = portNumber;  }   public void setSender(String sender) {    this.sender = sender;   }     public String getReceiver() {    return receiver;   }     public void setReceiver(String receiver) {    this.receiver = receiver;   }     public String getName() {    return name;   }     public void setName(String name) {    this.name = name;   }     public String getUsername() {    return username;   }     public void setUsername(String username) {    this.username = username;   }     public String getPassword() {    return password;   }     public void setPassword(String password) {    this.password = password;   }     public String getSubject() {    return subject;   }     public void setSubject(String subject) {    this.subject = subject;   }     public String getMessage() {    return message;   }     public void setMessage(String message) {    this.message = message;   }    } 

import org.apache.commons.mail.EmailException; import org.apache.commons.mail.HtmlEmail;  public class MailUtil {     public boolean send(Mail mail) {    //發送email對象   HtmlEmail email = new HtmlEmail();    try {     //這里是SMTP發送服務器的名字    email.setHostName(mail.getHost());     //端口號不為空時,用戶自定義的端口號為SMTP發送服務器端口號    if (!"".equals(mail.getPortNumber())) {     email.setSSLOnConnect(true);      email.setSslSmtpPort(mail.getPortNumber());    }    //字符編碼集的設置     email.setCharset(Mail.ENCODEING);     //收件人的郵箱     email.addTo(mail.getReceiver());     //發送人的郵箱     email.setFrom(mail.getSender(), mail.getName());     // 如果需要認證信息的話，設置認證：用戶名-密碼。分別為發件人在郵件服務器上的注冊名稱和密碼     email.setAuthentication(mail.getUsername(), mail.getPassword());     // 要發送的郵件主題     email.setSubject(mail.getSubject());     // 要發送的信息，由于使用了HtmlEmail，可以在郵件內容中使用HTML標簽     email.setMsg(mail.getMessage());     // 發送     email.send();     return true;    } catch (EmailException e) {     e.printStackTrace();     return false;    }   }  } 

import java.util.Random;   public class SimpleEmailClient {   public static void main(String[] args) throws InterruptedException {   Mail mail = new Mail();   mail.setHost("smtp.qq.com"); // 設置郵件服務器,如果不用QQ郵箱的,自己找找看相關的   mail.setPortNumber("465"); // 設置郵件服務器端口號,默認25   mail.setSender("xxxx@qq.com"); // 發送人   mail.setName("楊大俠"); // 發送人昵稱   mail.setSubject("好吃美味"); //發送主題   mail.setMessage("好吃美味"); //發送內容   mail.setUsername("xxxx@qq.com"); // 登錄賬號,一般都是和郵箱名一樣   mail.setPassword("********"); // QQ郵箱登錄第三方客戶端時,密碼框請輸入“授權碼”進行驗證。其他的密碼具體查看郵件服務器的說明      for (int i = 0; i < 1000; i++) {        //Thread.sleep(2000);        int max1 = 99999;    int min1 = 10000;    Random random = new Random();    int f = random.nextInt(max1)%(max1-min1+1) + min1;        int max2 = 9999;    int min2 = 1000;    Random random2 = new Random();    int s = random2.nextInt(max2)%(max2-min2+1) + min2;    String account = "" + f + "" + s + "@qq.com";        mail.setReceiver(account); // 接收人    System.out.println(account);    if (new MailUtil().send(mail)) {     System.out.println("發送成功");    } else {     System.out.println("發送失敗");    }   }     } }