Java中ResultSet轉爲List

1. 藉助bean的辦法

List<Person> list = new ArrayList<Person>();
        Connection conn = getConn();
        String sql = "select * from student_info";
        PreparedStatement pst;
        try {
            pst = (PreparedStatement) conn.prepareStatement(sql);
            ResultSet rs = pst.executeQuery();
            while(rs.next()){
                Person person = new Person();
                person.setName(rs.getString(2));
                person.setSex(rs.getString(3));
                person.setAge(rs.getString(4));
                list.add(person);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

即可將查出來的ResultSet轉爲List。
2. 藉助ResultSetMetaData 和Map

private static List convertList(ResultSet rs) throws SQLException {

        List list = new ArrayList();

        ResultSetMetaData md = rs.getMetaData();

        int columnCount = md.getColumnCount();

        while (rs.next()) {

            Map rowData = new HashMap();

            for (int i = 1; i <= columnCount; i++) {

                rowData.put(md.getColumnName(i), rs.getObject(i));

            }

            list.add(rowData);

        }

        return list;

}