如何清除文本文件而不使用groovy删除它

Question

I've a text file which I'll be using it to write content.. But every time before I write something to the file, I wish to clear the content without deleting the file..

How would I achieve the above? Any suggestions?

Answer 1

使用文本文件，您只需将其设置为空字符串即可。

file.text = ''

Answer 2

I would use the setBytes method on java.io.File and provide it with an empty byte array:

file.bytes = new byte[0]

Passing an empty list also works, impressively.

file.bytes = []

Answer 3

Presumably, you want simply to overwrite the file with new content. To do that:

def content = ...

new File("test.txt").withWriter { writer ->
    writer.write(content)
}

Note that File.withWriter will do all the usual housekeeping re: open/close file.