如何在java中替换json文件的值
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/19704996/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to replace a value of a json file in java
提问by user2826304
Hello members of stackoverflow,
你好，stackoverflow 的成员，
I need some help with replacing a line in a json file. I have attempted using the same method i use to replace a line in a text file with no success.
我需要一些帮助来替换 json 文件中的一行。我曾尝试使用与替换文本文件中的一行相同的方法，但没有成功。
Basically the json file contains the following string:
基本上 json 文件包含以下字符串：
"id": "TEXT",
And i want to replace the "TEXT" with "HELLO"
我想用“你好”替换“文本”
How would i do this, also i have the 'json_simple' library imported if that is of any use for this.
我将如何执行此操作，如果对此有任何用处，我还导入了“json_simple”库。
Any help with this would be greatly appreciated.
对此的任何帮助将不胜感激。
Thanks.
谢谢。
采纳答案by aleroot
Without using a JSON parser as someone suggested, you can do it simply with a regex :
不使用某人建议的 JSON 解析器，您只需使用正则表达式即可：
str = str.replaceAll("(\s*?\"id\"\s*?:\s*?)\"TEXT\",", "\"HELLO\"");
If the "TEXT" string is an unique placeholder for your replacement, you could simply use String replacemethod, in this way :
如果“TEXT”字符串是您替换的唯一占位符，您可以简单地使用字符串替换方法，如下所示：
str.replace("\"TEXT\"", "\"HELLO\"");
回答by SudoRahul
You cannot replace a value as such. Therefore, you need to remove it from the json and add it back.
您不能替换这样的值。因此，您需要将其从 json 中删除并重新添加。
JSONObject js = new JSONObject(); // Your jsonobject here, this is just a sample
js.remove("id"); // Since you want to replace the value associated with id, remove it
js.put("id", "HELLO"); // add the new value for id
回答by LC1NS4N3
try this
尝试这个
> "id": {
> "type": "String",
> "value": "TEXT" ...
>
> JSONObject modifiedjson=new JSONObject();
> modifiedjson.put("type",childobject.get("type"));
> modifiedjson.put("id","HELLO");
