Java 如何从 JsonObject 创建 InputStream 对象
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How to Create InputStream Object from JsonObject
提问by This 0ne Pr0grammer
I'm trying to figure out how one goes about retrieving the raw bytes stored in a JsonObject and turns that into an InputStream object?
我想弄清楚如何检索存储在 JsonObject 中的原始字节并将其转换为 InputStream 对象？
I figured it might be something like:
我想它可能是这样的：
InputStream fis = new FileInputStream((File)json.getJsonObject("data"));
Granted I haven't tried that out, but just wanted to know if anyone had any experience with this and knew the preferred way to do it?
当然，我还没有尝试过，但只是想知道是否有人对此有任何经验并知道首选的方法吗？
采纳答案by Chthonic Project
You can convert a JSONObjectinto its Stringrepresentation, and then convert that String into an InputStream.
您可以将 aJSONObject转换为其String表示形式，然后将该字符串转换为InputStream.
The code in the question has a JSONObject being cast into File, but I am not sure if that works as intended. The following, however, is something I have done before (currently reproduced from memory):
问题中的代码有一个 JSONObject 被转换为File，但我不确定这是否按预期工作。然而，以下是我之前做过的事情（目前从记忆中复制）：
String str = json.getJSONObject("data").toString();
InputStream is = new ByteArrayInputStream(str.getBytes());
Note that the toString()method for JSONObjectoverrides the one in java.lang.Objectclass.
请注意，toString()用于JSONObject覆盖java.lang.Object类中的方法。
From the Javadoc:
从Javadoc：
Returns:a printable, displayable, portable, transmittable representation of the object, beginning with { (left brace) and ending with } (right brace).
返回： 对象的可打印、可显示、可移植、可传输表示，以 {（左括号）开头，以 }（右括号）结尾。
回答by Yazan
if you want bytes, use this
如果你想要字节，使用这个
json.toString().getBytes()
or write a File savedFilecontains json.toString, and then
或者写一个savedFile包含json.toString的文件，然后
InputStream fis = new FileInputStream(savedFile);
