import javax.mail.*;public class mailauthenticator extends authenticator...{string authenname; //用户名 string authenpass; //密码 public mailauthenticator(string authenname,string authenpass) ...{super();this.authenname=authenname;this.authenpass=authenpass;}public passwordauthentication getpasswordauthentication()...{    //若服务器需要身份认证，session会自动调用这个方法 return new passwordauthentication(authenname,authenpass);}}