如何知道Hibernate中本机SQL查询结果的类型？

Question

I have a native SQL query in Hibernate. I get the query result by : List l = query.list() .

I know that each element of the list corresponds to a line of the result table. But what are the types of those elements ?

Java tells me they are of type : Object. Ok but I want more. Because I want to print the results in the Eclipse console. But for that, I have to know the types, I have to know what this list exactly contains.

Here is the result table of my query I get in SL Developer :

And know, I want to print all that data in Eclipse console

In Eclipse, I use Query query = session.createSQlQuery("my query"); List l = query.list();`

For information, here is the SQL query code :

Answer 1

The Object in the list is an array of Object s (one per column).

You have to iterate (that's for each row) then use the array of columns:

final List<Object> l = query.list();
for (final Object row : l) {
    final Object[] columns = (Object[]) row;
    // use columns[0],  columns[1] etc
    System.out.println(columns[0]);
}

Answer 2

If I've got your issue correct, try getClass().getName() methods, which'll give you runtime class of your object. More info here