PreparedStatement IN clause alternatives?

Question

What are the best workarounds for using a SQL IN clause with instances of java.sql.PreparedStatement, which is not supported for multiple values du

Answer 1

My example for SQLite and Oracle databases.

The first For loop is for Creating a PreparedStatement Objects.

The second For loop is for Supplying Values for PreparedStatement Parameters.

List roles = Arrays.asList("role1","role2","role3");
Map menu = getMenu(conn, roles);

public static Map getMenu(Connection conn, List roles ) {
    Map menu = new LinkedHashMap();

    PreparedStatement stmt;
    ResultSet rset;
    String sql;
    try {
        if (roles == null) {
            throw new Exception();
        }
        int size = roles.size();
        if (size == 0) {
            throw new Exception("empty list");
        }
        StringBuilder sb = new StringBuilder();
        sb.append("select page_controller, page_name from pages "
                + " where page_controller in (");
        for (int i = 0; i < size; i++) {
            sb.append("?,");
        }
        sb.setLength(sb.length() - 1);
        sb.append(") order by page_id");
        sql = sb.toString();
        stmt = conn.prepareStatement(sql);
        for (int i = 0; i < size; i++) {
            stmt.setString(i + 1, roles.get(i));
        }
        rset = stmt.executeQuery();
        while (rset.next()) {
            menu.put(rset.getString(1), rset.getString(2));
        }

        conn.close();
    } catch (Exception ex) {
        logger.info(ex.toString());
        try {
            conn.close();
        } catch (SQLException e) {
        }
        return menu;
    }
    return menu;
}