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public class User implements Serializable{
private static final long serialVersionUID = 1L;


private Integer id;

transient private String username;

private transient String password;
// getter & setter
}
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package com.eastpro.batch.biz;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.security.spec.X509EncodedKeySpec;
public class SendMail {
  private MimeMessage mimeMsg; //MIME mail object
  private Session session;
  ......

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