1.特徵:就是普通的sql語句
QueryResult<Object[]> q = devicecalibratecurveManager.getScrollDateByNativeSQL(startIndex, maxIndex, fieldSQL, tableSQL, whereSB.toString(), params.toArray(), orderby);
2.實現類
/*
* 原生SQL分頁查詢或實體SQL分頁查詢
*
* @param startIndex 分頁的起始位置
*
* @param maxResult 每頁顯示的記錄數
*
* @param searchField 所查詢的字段
*
* @param fromSQL 查詢的表
*
* @param whereSQL 查詢條件
*
* @param params 參數值
*
* @param orderby 排序字段
*
* @return QueryResult
*/
@SuppressWarnings("unchecked")
// @Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true)
public QueryResult<Object[]> getScrollDateByNativeSQL(int startIndex,
int maxResult, String searchField, String fromSQL, String whereSQL,
Object[] params, LinkedHashMap<String, String> orderby)
throws Exception {
QueryResult<Object[]> qr = new QueryResult<Object[]>();
SQLQuery query = null;
String where = (whereSQL != null && !"".equals(whereSQL.trim())) ? " where "
+ whereSQL
: "";
String nativeSQl = "select " + searchField + " from " + fromSQL + where
+ buildSqlOrderBy(orderby);
query = createSQLQuery(nativeSQl, params);
if (startIndex != -1 && maxResult != -1)
query.setFirstResult(startIndex).setMaxResults(maxResult);
qr.setResultlist(query.list());
String countString = "";
if (searchField.indexOf("distinct") != -1) {
countString = "select " + searchField + " from " + fromSQL + where
+ " ";
query = createSQLQuery(countString, params);
qr.setTotalrecord(query.list().size());
} else {
countString = "select count(*) from " + fromSQL + where;
query = createSQLQuery(countString, params);
qr.setTotalrecord(new Long(query.uniqueResult().toString()));
}
return qr;
}
/**
* 生成排序SQL(原生)
*
* @param orderby
* 排序屬性
*/
private static String buildSqlOrderBy(LinkedHashMap<String, String> orderby) {
StringBuilder sb = new StringBuilder();
if (orderby != null && orderby.size() > 0) {
sb.append(" order by ");
for (String key : orderby.keySet()) {
sb.append(key).append(" ").append(orderby.get(key)).append(",");
}
sb.deleteCharAt(sb.length() - 1);
}
return sb.toString();
}
/**
* SQL方式查詢
*
* @param sql
* 符合SQL語法的查詢語句
* @param values
* 數量可變的條件值,按順序綁定
*/
public SQLQuery createSQLQuery(final String sql, final Object... values) {
SQLQuery query = getSession().createSQLQuery(sql);
if (values != null) {
for (int i = 0; i < values.length; i++) {
query.setParameter(i, values[i]);
}
}
return query;
}
Hibernate中用普通的sql語句實現分頁查詢
發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章
Hibernate中多個對象的分頁查詢
CLA1989
2018-08-23 13:18:51
Hibernate查詢某個對象的某些屬性
CLA1989
2018-08-23 13:18:51
Hibernate實現xml的分頁查詢
CLA1989
2018-08-23 13:18:51
Hibernate單個實體的分頁查詢
CLA1989
2018-08-23 12:53:49