@Override
public double getcosttotal() {
// TODO Auto-generated method stub
try {
mysqlimp = new MySqlImp();
String getsum = "SELECT SUM(支出) FROM 利润表";
ResultSet rs = mysqlimp.query(getsum);
rs.next();
double result = rs.getDouble(1);
rs.close();
return result;
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return 0;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return 0;
}
}