标准addOrder按trim（字段）排序？

问题描述

  public List< Object> listEntry（final int rowNumMin，final int maxResult，
 final String orderField，final int orderSort）{
 
 Criteria requete = getSession（）。createCriteria（
 getPersistentClass（））; 
 if（orderSort = 1）{
 requete.addOrder（Order.asc（orderField））; 
} else {
 requete.addOrder（Order.desc（orderField））; 
} 
 requete.setMaxResults（maxResult）; 
 requete.setFirstResult（rowNumMin）; 
 final List< Object> resultat = requete.list（）; 
返回结果; 
} 
  

这就好像

  SELECT * FROM myTable ORDER BY orderField LIMIT rowNumMin，maxResult; 
  

但我想获得

  SELECT * FROM myTable ORDER BY TRIM（orderField）LIMIT rowNumMin，maxResult; 
  

我该怎么做？

解决方案

您必须创建 org.hibernate.criterion.Order 的自定义子类，并覆盖 toSqlString 方法通过子句生成SQL 命令。

然后使用
$ b

criteria.addOrder（new TrimOrder（orderField，true））。

All is in this question, here is my method.

public List<Object> listEntry(final int rowNumMin, final int maxResult,
    final String orderField, final int orderSort) {

    final Criteria requete = getSession().createCriteria(
            getPersistentClass());
    if(orderSort=1){
        requete.addOrder(Order.asc(orderField));
    } else {
        requete.addOrder(Order.desc(orderField));
    }
    requete.setMaxResults(maxResult);
    requete.setFirstResult(rowNumMin);
    final List<Object> resultat = requete.list();
    return resultat;
}

This is like

SELECT * FROM myTable ORDER BY orderField LIMIT rowNumMin, maxResult;

but I would like to obtain

SELECT * FROM myTable ORDER BY TRIM(orderField) LIMIT rowNumMin, maxResult;

How can I do this ?

解决方案

You'll have to create a custom subclass of org.hibernate.criterion.Order, and override the toSqlString method to generate the SQL order by clause you want.

And then use criteria.addOrder(new TrimOrder("orderField", true)).

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