preparedStatement.executeUpdate语句不能执行

Question

public boolean updateStaff(Staff staff) {
try {
if (connection == null) {
connection = ConnectionFactory.getConnection();
}
String sql = "update staff set staff_name=?,staff_auth=? where staff_id=?";
PreparedStatement preparedStatement = connection
.prepareStatement(sql);

        preparedStatement.setString(1, staff.getStaffName());
        preparedStatement.setString(2, staff.getStaffAuth());
        preparedStatement.setInt(3, staff.getStaffId());
        int row = preparedStatement.executeUpdate();
        if (row >= 1) {
            return true;
        } else {
            return false;
        }

    } catch (Exception e) {
        e.printStackTrace();
        return false;
    } finally {
        ConnectionFactory.closeConnection(connection);
    }
}

调用：
Staff staff = new Staff();
staff.setStaffId(123);
staff.setStaffName("2");
staff.setStaffAuth("gh");
StaffDaoImpl staffDaoImpl = new StaffDaoImpl();
boolean i = staffDaoImpl.updateStaff(staff);
System.out.println(i);

不报错，参数都能正常传送，执行了preparedStatement.executeUpdate();返回0，不知道哪里有问题，各位大神帮帮忙啊

Answer 1

preparedstatement.executeUpdate()不需要返回值