Cannot map the timestamp type --mybatis generator - generator

Question

When I use the mybatis generator,I get a trouble:
in the database ,I have two columns which their type is timestamp(mysql) like the following.
enter image description here
but at the end it generate a date type for me in the source code.how can I map them to a timestamp type?
the xml config:
`<table schema="system-account" tableName="person" domainObjectName="Person"
mapperName="PersonDao">
<generatedKey column="person_id" sqlStatement="JDBC"/>
<columnOverride column ="name" javaType="java.lang.String"/>
<columnOverride column ="create_time" javaType="java.sql.Timestamp"/>
<columnOverride column ="used" javaType="java.lang.Boolean"/>
<columnOverride column ="update_time" javaType="java.sql.Timestamp"/>
</table>`
the source code:
public class Person {
/**
* This field was generated by MyBatis Generator. This field corresponds to
the database column person.person_id
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
private Long personId;
/**
* This field was generated by MyBatis Generator. This field corresponds to
the database column person.name
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
private String name;
/**
* This field was generated by MyBatis Generator. This field corresponds to
the database column person.createtime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
private Date createtime;
/**
* This field was generated by MyBatis Generator. This field corresponds to
the database column person.used
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
private Boolean used;
/**
* This field was generated by MyBatis Generator. This field corresponds to
the database column person.updatetime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
private Date updatetime;
/**
* This method was generated by MyBatis Generator. This method returns the
value of the database column person.person_id
* #return the value of person.person_id
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public Long getPersonId() {
return personId;
}
/**
* This method was generated by MyBatis Generator. This method sets the
value of the database column person.person_id
* #param personId the value for person.person_id
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public void setPersonId(Long personId) {
this.personId = personId;
}
/**
* This method was generated by MyBatis Generator. This method returns the
value of the database column person.name
* #return the value of person.name
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public String getName() {
return name;
}
/**
* This method was generated by MyBatis Generator. This method sets the
value of the database column person.name
* #param name the value for person.name
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public void setName(String name) {
this.name = name;
}
/**
* This method was generated by MyBatis Generator. This method returns the
value of the database column person.createtime
* #return the value of person.createtime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public Date getCreatetime() {
return createtime;
}
/**
* This method was generated by MyBatis Generator. This method sets the
value of the database column person.createtime
* #param createtime the value for person.createtime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
/**
* This method was generated by MyBatis Generator. This method returns the
value of the database column person.used
* #return the value of person.used
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public Boolean getUsed() {
return used;
}
/**
* This method was generated by MyBatis Generator. This method sets the
value of the database column person.used
* #param used the value for person.used
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public void setUsed(Boolean used) {
this.used = used;
}
/**
* This method was generated by MyBatis Generator. This method returns the
value of the database column person.updatetime
* #return the value of person.updatetime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public Date getUpdatetime() {
return updatetime;
}
/**
* This method was generated by MyBatis Generator. This method sets the
value of the database column person.updatetime
* #param updatetime the value for person.updatetime
* #mbg.generated Tue Sep 11 09:09:49 GMT+08:00 2018
*/
public void setUpdatetime(Date updatetime) {
this.updatetime = updatetime;
}
}