Question

使用Java编写的语句将数组传递给SQL查询时遇到了一些麻烦。我首先尝试了sourceforge驱动程序，但是当我调用setArray方法时，我会得到AbstractMethodError。不知道我交换到Microsoft sqlserver驱动程序的解决方案，但现在我完全得到一个不同的错误，即“java.sql.SQLFeatureNotSupportedException：不支持此操作”。尝试了很多东西来尝试解决这个问题，但似乎没有任何工作可行。

我的Java代码看起来类似于我在这里和互联网上看到的示例，如下所示，

PreparedStatement ps = connection.prepareStatement(query);
String[] suppliers = {"21","2774","120563","3714","59"};
ps.setArray(1, connection.createArrayOf("text", suppliers));
ResultSet rs = ps.executeQuery();

我的SQL查询示例。真正感兴趣的唯一一条就是前一行，我添加了'？'字符，据我所知，它是如何将参数传递给SQL查询。

productsPrices.query = select contract.supplierid as 'hotelid' \
  , round((rate.s1/money.buy)*euro.sell,0) as "single" \
  , round((rate.s2/money.buy)*euro.sell,0) as "double" \
  ,service.Name as 'roomtype' \
  ,stock.alloc - stock.taken as 'stock.available' \
  , contract.notes as 'boardType' \
  , object.name as 'occupancy' \
  ,object.cap as 'capacity' \
  ,object.mincap as 'min capacity' \
  ,stock.date as 'date' \
from stock stock \
  inner join rate rate on stock.rateid = rate.id \
  inner join contract contract on rate.contractid = contract.id \
  inner join service service on contract.serviceid = service.ID \
  inner join object object on service.objectid = object.ID \
  inner join band band on contract.termsid = band.ID \
  inner join Money money on band.moneyid = money.id \
  inner join Money euro on euro.Name  = 'Euros' \
where stock.date > getdate() \
and stock.closed = 0 \
and (stock.alloc - stock.taken) > 0 \
and stock.date > getdate() \
      and contract.supplierid in (?) \
      and contract.Finish > GETDATE()

Answer 1

我通过动态生成带有所需问号数量的字符串来解决同样的问题。这是一个片段： -

String param = "(";
for(int i=0;i<suppliers.length;i++){
param = param+"?,";
}
param = param.substring(0,param.length()-1);
param=param+")";

query = query + param;

PreparedStatement ps = connection.prepareStatement(query);

for(int i=0;i<suppliers.length;i++){
ps.setString(i+1,suppliers[i]);
}

使用Java的PreparedStatement将数组传递给SQL查询

1 个答案: