JSON : 从 python 到 Java 的序列化

Question

我有一个获取 json 数据的 python 爬虫和使用此数据的 java 程序。我的方法是将 json 数据序列化到一个文件中。它在 python 中表示为字典，我做了：

mails_file.write(str(email)+'\n')

这将产生如下结果：

{u'from': u'Brian Yablonski <brian@jeb.org>', u'dateCentral': u'1999-01-05T07:33:06-06:00', u'to': u'"\'jeb@jeb.org\'" <jeb@jeb.org>', u'date': u'Tue, 5 Jan 1999 08:33:06 -0500', u'message': u"Missed the deadline, but I would have said the speech is a first step \ntoward restoring the rightful place of communities and families as the \nfirst source of ideas and solutions to our society's problems and to show \nthat government can work not as a master of, but a partner with, these \ninstitutions.\n\n-----Original Message-----\nFrom:\tJeb Bush [SMTP:jeb@jeb.org]\nSent:\tMonday, January 04, 1999 3:44 PM\nTo:\tYablonski Brian\nSubject:\tFW: Speech\n\nHow would you describe the speech for Mark?\n\n-----Original Message-----\nFrom:\tMark Silva [mailto:bureau@tdo.infi.net]\nSent:\tMonday, January 04, 1999 3:14 PM\nTo:\tJeb@jeb.org\nSubject:\tSpeech\n\nHave a quick thematic description for me about what you hope to accomplish\nwith tomorrow's inaugural address? (If you see this note before 6:30). If\nnot, thanks anyway and I wish you well Tuesday.", u'id': u'19990105-01BE3886.0851BC20.brian@jeb.org', u'subject': u'RE: Speech'}

然后我想做一些python-java格式调整，例如：

line = line.replace('u"', '"')
line = line.replace("u'", '"')
line = line.replace("'", '"')

最后使用 java 加载 JSON 个对象：

JSONObject lineJson = new JSONObject(line);

由于 python 可互换使用 " 和 ' 字符，此方法在我 95% 的对象上都失败了。我怎样才能克服这个问题并编写一个真正有效的格式转换函数？

Answer 1

您需要使用 json 模块或等效模块：

import json
# ...
json.dump(email, mails_file)

来自关于 json.dump 的文档：

Serialize obj as a JSON formatted stream to fp (a .write()-supporting file-like object) using this conversion table.

JSON : 从 python 到 Java 的序列化

JSON : serialization from python to Java

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