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String sql=" from t_Product where 1=1 and ";String ProductName = request.getParameter("ProductName");if (ProductName!=null) sql=sql+"ProductName like '%" + ProductName + "%' and " ;sql=sql.substring(0,sql.length()-4); // È¥µôβ²¿µÄ and ×Ö·û´®sql="select top " + String.valueOf(intPageSize) + " *" +sql+" and id <=(select min(id) from (select top " + String.valueOf(intPage*intPageSize) + " id " + sql + " order by id desc) as T) "; //ͨ¹ý×Ó²éѯ¼Ó¿ìËÙ¶Èsql=sql+" order by id desc ";