dbutils - Apache DBUtils 关闭连接

Question

我正在阅读 DBUtils 的更新方法。据我了解，sql查询运行后应该关闭dataSource的连接。但是我发现了几个 update 方法的实现，它们将 false 作为 closeConn 参数传递。谁能告诉我这是为什么？

    public int update(Connection conn, String sql, Object... params) throws SQLException {
        return update(conn, false, sql, params);
    }


    public int update(String sql) throws SQLException {
        Connection conn = this.prepareConnection();

        return this.update(conn, true, sql, (Object[]) null);
    }

    private int update(Connection conn, boolean closeConn, String sql, Object... params) throws SQLException {
        if (conn == null) {
            throw new SQLException("Null connection");
        }

        if (sql == null) {
            if (closeConn) {
                close(conn);
            }
            throw new SQLException("Null SQL statement");
        }

        PreparedStatement stmt = null;
        int rows = 0;

        try {
            stmt = this.prepareStatement(conn, sql);
            this.fillStatement(stmt, params);
            rows = stmt.executeUpdate();

        } catch (SQLException e) {
            this.rethrow(e, sql, params);

        } finally {
            close(stmt);
            if (closeConn) {
                close(conn);
            }
        }

        return rows;
    }