How to parse a date with milliseconds?

问题

I have a date in the following format: "2014-03-10 11:20:34.3454". How can I parse this date?

The chrono doc mentions parsing year, month, ..., minutes and seconds. No milliseconds. Also when I look at rust-datetime again - no milliseconds.

On the other hand, I can create a DateTime like this UTC.ymd(2014, 11, 28).and_hms_milli(7, 8, 9, 10). So Rust knows milliseconds...

回答1:

extern crate time;

fn main() {
    match time::strptime("2014-03-10 11:20:34.3454",
                         "%Y-%m-%d %H:%M:%S.%f")
    {
        Ok(v) => println!("{}", time::strftime("%Y/%m/%d %H:%M:%S.%f",
                                               &v).unwrap()),
        Err(e) => println!("Error: {}", e),
    };
}

Output:

2014/03/10 11:20:34.345400000

strptime() and strftime() are quite helpful when using time values. Plus, they tend to work in most languages so learning it once pays well over time.

来源：https://stackoverflow.com/questions/31126366/how-to-parse-a-date-with-milliseconds