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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.util;
import java
.text.ParseException;
import java
.text.SimpleDateFormat;
import java
.util.Date;
import java
.util.Calendar;
import java
.util.GregorianCalendar;
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