英文:
Adding new files to a folder
问题
我已经创建了一个区块链解决方案，原则上运行良好，但我需要每次代码被执行时，都在文件夹中创建一个新文件。目前它只会不断地覆盖该文件。
有人可以帮我解决这个问题吗？
英文:
I have created a blockchain solution and that works fine in principle but I need it so that every time the code gets executed, a new file is created in the folder. Currently it just keeps overwriting the file.
Can anyone help me out on this?
答案1
得分: 1
也许在创建文件时可以获取当前时间戳。时间戳是唯一的，因此不会出现覆盖的问题。
File f = new File("yourFileName" + System.currentTimeMillis());
英文:
Maybe you can get the current timestamp when creating the file. The timestamp is unique, so it will not have the problem of overwriting.
File f = new File("yourFileName"+System.currentTimeMillis());
答案2
得分: 0
下面的代码应该可以完成您的工作。您可以通过使用事务ID作为文件名，将新文件名保持唯一。
String dir = "Some Path";
File test = new File(dir + getFileName());
try {
test.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
您可以使用以下代码获取唯一的文件名：
public String getFileName() {
return UUID.randomUUID().toString();
}
英文:
The below code should do your work. you can keep the new Filename as unique by using transaction id as the fileName.
String dir = "Some Path";
File test = new File(dir + "newFileName");
try {
test.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
You can use the below code to get unique fileName:
public String getFileName() {
return UUID.randomUUID().toString();
}
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