Shell-Script
更改 awk 命令中的日期格式
我有一個帶有以下範例記錄的文件 mdn.txt。
mdn.txt:
123456,2711448,1,20150214092425,20150714092425,120,20150814163821,,123,,,123,20150214092425,,123,,,123,20150214092425,,123,Y
現在我想處理我的文件的每條記錄,
awk
並希望更改日期欄位的格式,如下所示:123456,2711448,1,14-02-2015 09:24:25,14-07-2015 09:24:25,120,14-08-2015 16:38:21,,123,,,123,14-02-2015 09:24:25,,123,,,123,14-02-2015 09:24:25,,123,Y
此處輸入的日期是帶有(Year, M onth , Day, Hour , M inute , S econd)的數字
YYYYMMDDHHMMSS
輸出應該是:
DD-MM-YYYY HH:MM:SS
awk 'BEGIN{ FS=OFS="," n=split("4,5,7,13,19", f) # array of input field numbers } { for(i=1; i<=n; i++) if($f[i]) $f[i] = dconv($f[i]); print } function dconv(x) { YY=substr(x, 1, 4) mm=substr(x, 5, 2) dd=substr(x, 7, 2) hh=substr(x, 9, 2) nn=substr(x,11, 2) ss=substr(x,13, 2) return dd"-"mm"-"YY" "hh":"nn":"ss }' file
下面,(基本上)是相同的腳本,還有一個數組(並且沒有函式)
awk 'BEGIN{ FS=OFS="," nf=split("4,5,7,13,19", f) # array of input field numbers nd=split(",7,2,-,5,2,-,1,4, ,9,2,:,11,2,:,13,2", d) # array of date subfield info (in output order): prefix(out),pos(in),len(in) } { for(i=1; i<=nf; i++){ if($f[i]) { fmod="" for(j=1; j<=nd; j+=3) fmod=fmod sprintf("%s", d[j] substr($f[i], d[j+1], d[j+2])) $f[i] = fmod } } print }' file