java spring-mvc，sql多表查询,将查询结果放入一个临时定义的class中，怎么执行语句

public class UserTemp {
Long id;
String username;
String enterDate;
String classify;
String email;
int attentionNum;
int gemNum;
int appraisalNum;
int messageNum;
Date loginTimes;
Date lastLogin;
int receiveNum;

String SQL8="SELECT u.id as id, u.enter_date AS enterDate,u.username as username,u.email as email,u.attention_num as attentionNum,u.gem_num as gemNum,u.appraisal_num as appraisalNum,u.login_times as loginTimes,u.last_login as lastLogin,COUNT(m.receive_num) as receiveNum,a.target as target FROM tb_users as u LEFT JOIN tb_massage_relation as m ON u.id = m.to_user_id LEFT JOIN tb_authorizations as a ON u.id=a.bind_user_id WHERE u.activ_email='0'";

if(enterDateStart!=null){
SQL8 += " AND u.enterDate >? ";
params.add(enterDateStart);
}
if(enterDateEnd!=null){
SQL8 += " AND u.enterDate < ? ";
params.add(enterDateEnd);
}

if (StringUtils.isNotBlank(username)) {
SQL8 += " AND u.username = ? ";
params.add(username);
}
if (StringUtils.isNotBlank(email)) {
SQL8 += " AND u.email = ? ";
params.add(email);
}
if (StringUtils.isNotBlank(classify) && !StringUtils.equals("#", classify)) {
SQL8 += " AND a.target = ? ";
params.add(classify);
}
SQL8 += " GROUP BY m.to_user_id ";
System.out.println(SQL8);
return findListBySQL(SQL8, UserTemp.class);

错误：Caused by: org.hibernate.MappingException: Unknown entity: _360gem.admin.entity.user.UserTemp

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