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请参阅：java : pdfbox 读取 PDF文件内书签 或者 python：从PDF中提取目录

请注意：书的目录.txt 编码：UTF-8，推荐用 Notepad++ 转换编码。

xml 是 python 标准库，在 D:\Python39\Lib\xml\etree

python 用 xml.etree.ElementTree 生成思维导图 Freemind（.mm）文件

编辑 txt_xml_etree_mm.py  如下

# -*- coding: utf-8 -*-
""" 读目录.txt文件，使用 xml.etree 生成思维导图 Freemind（.mm）文件"""
import os
import sys
import codecs
import xml.etree.ElementTree as etif len(sys.argv) ==2:f1 = sys.argv[1]
else:print('usage: txt_xml_etree_mm.py  file1.txt')sys.exit(1)if not os.path.exists(f1):print(f"ERROR: {f1} not found.")sys.exit(1)fn,ext = os.path.splitext(f1)
if ext.lower() != '.txt':print('ext is not .txt')sys.exit(2)# 创建根节点
map1 = et.Element("map")
map1.set('version', '1.0.1')fp = codecs.open(f1, mode="r", encoding="utf-8")
# 读取第一行：书名
title = fp.readline()
# 创建主题节点
root = et.SubElement(map1, "node")
root.set('ID', '1')
root.set('STYLE', 'bubble') # 泡框
root.set('TEXT', title.strip())# 定义连线的颜色：红色
edge = et.SubElement(root, "edge")
edge.set('COLOR', "#ff0000")# 用缩排表现层级关系，假设最多5个层级
indent1 = ' '*2
indent2 = ' '*4
indent3 = ' '*6
indent4 = ' '*8n = 2
for line in fp:txt = line.strip()if len(txt) ==0:continuetxt = txt[0:-3] # 去掉行尾的页数if len(txt) >0 and line[0] !=' ':# 创建主题的子节点（1级节点）node1 = et.SubElement(root, "node")node1.set('ID', str(n))node1.set('POSITION', "right")node1.set('TEXT', txt)p_node = node1 # 寄存父节点elif line.startswith(indent1) and line[2] !=' ':# 创建node1的子节点（2级节点）try: type(node1)except NameError: node2 = et.SubElement(root, "node")else: node2 = et.SubElement(node1, "node")node2.set('ID', str(n))node2.set('TEXT', txt)p_node = node2elif line.startswith(indent2) and line[4] !=' ':# 创建node2的子节点（3级节点）try: type(node2)except NameError: node3 = et.SubElement(node1, "node")else: node3 = et.SubElement(node2, "node")node3.set('FLODED', "true")node3.set('ID', str(n))node3.set('TEXT', txt)p_node = node3elif line.startswith(indent3) and line[6] !=' ':# 创建node3的子节点（4级节点）try: type(node3)except NameError: node4 = et.SubElement(node2, "node")else: node4 = et.SubElement(node3, "node")node4.set('ID', str(n))node4.set('TEXT', txt)p_node = node4elif line.startswith(indent4) and line[8] !=' ':# 创建node4的子节点（5级节点）try: type(node4)except NameError: node5 = et.SubElement(p_node, "node")else: node5 = et.SubElement(node4, "node")node5.set('ID', str(n))node5.set('TEXT', txt)else:print(txt)n += 1
fp.close()# 转换成 str，方便导出
map_bytes = et.tostring(map1, encoding="utf-8")# 导出到 .mm 格式的文件中
f2 = fn +'.mm'
with open(f2, 'w+b') as fp:fp.write(map_bytes)print(f"line number: {n}")

运行 python txt_xml_etree_mm.py  your_pdf_dir.txt

生成 your_pdf_dir.mm