问题描述
我正在使用Twitter API，但下面的字符串困扰着我 Proyecto de ingeniera comercial，实际是Profesora dematemáticas\u0000\u0000\u0000\u0000\u0000 Chileu0000\u0000\u0000\u0000\u0000Enseña智利
我想将其存储在PostgreSql中，但 \u0000 不被接受，所以我想替换它。
我尝试使用 string = string.replaceAll（ \\u0000，）; ，但是它不起作用。我只得到以下内容
I'm using the Twitter API and I have the following string that is bugging me Proyecto de ingeniera comercial, actual Profesora de matemáticas \u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000Enseña Chile
I want to store that in PostgreSql, but \u0000 is not accepted, so I want to replace it.
I try to use string= string.replaceAll("\\u0000", ""); but it doesn't work. I just get the following
String json = TwitterObjectFactory.getRawJSON(user);
System.out.println(json);
json = json.replaceAll("\\u0000", "");
System.out.println(json);
输出（仅重要的部分）
Proyecto de ingeniera comercial, actual Profesora de matemáticas \u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000Enseña Chile
Proyecto de ingeniera comercial, actual Profesora de matemáticas \u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000Enseña Chile
如果我将这一部分放在Java的String中，则替换有效，但如果我将其放在文本文件中，或者直接在Twitter上读取它不起作用
所以我的问题是，如何从字符串中替换\u0000？
顺便说一下，完整的字符串是这个
If I put that part in an String in java the replacement works, but if I put it in an text file or I read it directly for Twitter it doesnt work
So my question is, How do I replace \u0000 from an string?
By the way, the full string is this
{"utc_offset":null,"friends_count":83,"profile_image_url_https":"https://pbs.twimg.com/profile_images/2636139584/3a8455cd94045fa6980402add14796a9_normal.jpeg","listed_count":1,"profile_background_image_url":"http://abs.twimg.com/images/themes/theme1/bg.png","default_profile_image":false,"favourites_count":0,"description":"Proyecto de ingeniera comercial, actual Profesora de matemáticas \u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000Enseña Chile","created_at":"Sat May 28 14:24:06 +0000 2011","is_translator":false,"profile_background_image_url_https":"https://abs.twimg.com/images/themes/theme1/bg.png","protected":false,"screen_name":"Fsquadritto","id_str":"306825274","profile_link_color":"0084B4","is_translation_enabled":false,"id":306825274,"geo_enabled":false,"profile_background_color":"C0DEED","lang":"es","profile_sidebar_border_color":"C0DEED","profile_location":null,"profile_text_color":"333333","verified":false,"profile_image_url":"http://pbs.twimg.com/profile_images/2636139584/3a8455cd94045fa6980402add14796a9_normal.jpeg","time_zone":null,"url":null,"contributors_enabled":false,"profile_background_tile":false,"entities":{"description":{"urls":[]}},"statuses_count":2,"follow_request_sent":false,"followers_count":36,"profile_use_background_image":true,"default_profile":true,"following":false,"name":"Fiorella Squadritto","location":"","profile_sidebar_fill_color":"DDEEF6","notifications":false,"status":{"in_reply_to_status_id_str":null,"in_reply_to_status_id":null,"possibly_sensitive":false,"coordinates":null,"created_at":"Fri Oct 12 17:40:35 +0000 2012","truncated":false,"in_reply_to_user_id_str":null,"source":"<a href=\"http://instagram.com\" rel=\"nofollow\">Instagram<\/a>","retweet_count":1,"retweeted":false,"geo":null,"in_reply_to_screen_name":null,"entities":{"urls":[{"display_url":"instagr.am/p/QsOQxTNfvQ/","indices":[49,69],"expanded_url":"http://instagr.am/p/QsOQxTNfvQ/","url":"http://t.co/GKziME7N"}],"hashtags":[{"indices":[24,34],"text":"eduinnova"}],"user_mentions":[{"indices":[35,47],"screen_name":"ensenachile","id_str":"57099132","name":"Enseña Chile","id":57099132}],"symbols":[]},"id_str":"256811615171792896","in_reply_to_user_id":null,"favorite_count":1,"id":256811615171792896,"text":"Amando las matemáticas! #eduinnova @ensenachile http://t.co/GKziME7N","place":null,"contributors":null,"lang":"es","favorited":false}}
推荐答案
string = string.replace("\u0000", ""); // removes NUL chars
string = string.replace("\\u0000", ""); // removes backslash+u0000
带有转义符的字符是在Java源代码级别完成的。例如， class是：
The character with u-escaping is done on java source level. For instance "class" is:
public \u0063lass C {
也可以不需要正则表达式。
Also you do not need regex.
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