90 lines
2.6 KiB
Java
90 lines
2.6 KiB
Java
package samples.test;
|
|
|
|
import com.jacob.com.*;
|
|
import com.jacob.activeX.*;
|
|
|
|
class Access
|
|
{
|
|
public static void main(String[] args) throws Exception
|
|
{
|
|
ComThread.InitSTA();
|
|
ActiveXComponent ax = new ActiveXComponent("DAO.PrivateDBEngine");
|
|
// this only works for access files pre-access-2000
|
|
Dispatch db = open(ax, ".\\sample2.mdb");
|
|
String sql = "select * from MainTable";
|
|
// make a temporary querydef
|
|
Dispatch qd = Dispatch.call(db, "CreateQueryDef","").toDispatch();
|
|
// set the SQL string on it
|
|
Dispatch.put(qd, "SQL", sql);
|
|
Variant result = getByQueryDef(qd);
|
|
// the 2-d safearray is transposed from what you might expect
|
|
System.out.println(result.toSafeArray());
|
|
close(db);
|
|
ComThread.Release();
|
|
}
|
|
|
|
/**
|
|
* Open a database
|
|
*/
|
|
public static Dispatch open(ActiveXComponent ax, String fileName)
|
|
{
|
|
Variant f = new Variant(false);
|
|
// open the file in read-only mode
|
|
Variant[] args = new Variant[] {new Variant(fileName), f, f};
|
|
Dispatch openDB = ax.invoke("OpenDatabase", args).toDispatch();
|
|
return openDB;
|
|
}
|
|
|
|
/**
|
|
* Close a database
|
|
*/
|
|
public static void close(Dispatch openDB)
|
|
{
|
|
Dispatch.call(openDB, "Close");
|
|
}
|
|
|
|
/**
|
|
* Extract the values from the recordset
|
|
*/
|
|
public static Variant getValues(Dispatch recset)
|
|
{
|
|
Dispatch.callSub(recset,"moveFirst");
|
|
Variant vi = new Variant(4096);
|
|
Variant v = Dispatch.call(recset,"GetRows", vi);
|
|
return v;
|
|
}
|
|
|
|
public static Variant getByQueryDef(Dispatch qd)
|
|
{
|
|
// get a reference to the recordset
|
|
Dispatch recset = Dispatch.call(qd, "OpenRecordset").toDispatch();
|
|
// get the values as a safe array
|
|
String[] cols = getColumns(recset);
|
|
for(int i=0;i<cols.length;i++)
|
|
{
|
|
System.out.print(cols[i]+" ");
|
|
}
|
|
System.out.println("");
|
|
Variant vals = getValues(recset);
|
|
return vals;
|
|
}
|
|
|
|
public static String[] getColumns(Dispatch recset)
|
|
{
|
|
Dispatch flds = Dispatch.get(recset, "Fields").toDispatch();
|
|
int n_flds = Dispatch.get(flds, "Count").toInt();
|
|
String[] s = new String[n_flds];
|
|
Variant vi = new Variant();
|
|
for (int i=0;i<n_flds;i++) {
|
|
vi.putInt(i);
|
|
// must use the invoke method because this is a method call
|
|
// that wants to have a Dispatch.Get flag...
|
|
Dispatch fld = Dispatch.invoke(recset, "Fields",
|
|
Dispatch.Get, new Object[] {vi}, new int[1]).toDispatch();
|
|
Variant name = Dispatch.get(fld, "Name");
|
|
s[i] = name.toString();
|
|
}
|
|
return s;
|
|
}
|
|
}
|