您可以从ResultSetmetaData获取列号：
Statement st = conn.createStatement();ResultSet rs = st.executeQuery(query);ResultSetmetaData rsmd = rs.getmetaData();int columnsNumber = rsmd.getColumnCount();
您可以从ResultSetmetaData获取列号：
Statement st = conn.createStatement();ResultSet rs = st.executeQuery(query);ResultSetmetaData rsmd = rs.getmetaData();int columnsNumber = rsmd.getColumnCount();
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