使用Bash读取和处理CSV文件的方法

 #!/bin/bash

while read line
do
  # 保存 $line 行中读入的CSV文件的一行文本，通过cut命令分列保存在变量中。
  col1=$(echo ${line} | cut -d , -f 1)
  col2=$(echo ${line} | cut -d , -f 2)
  col3=$(echo ${line} | cut -d , -f 3)

  # 处理内容描述在这里

  # $colX 参考读入的 CSV 文件的文本
  echo "col1:$col1 col2:$col2 col3:$col3"
done < $1

$ cat hoge.csv 
a1,a2,a3
b1,b2,b3
c1,c2,c3
$ 

$ ./hoge.sh hoge.csv 
col1:a1 col2:a2 col3:a3
col1:b1 col2:b2 col3:b3
col1:c1 col2:c2 col3:c3
$ 

 #!/bin/bash

 # 将读取的CSV文件的一行文本分列存储在多个变量中
while IFS=, read col1 col2 col3
do
  # 处理内容描述在这里

  # $colX 参考读入的 CSV 文件的文本
  echo "col1:$col1 col2:$col2 col3:$col3"
done < $1

 #!/bin/bash

while IFS=, read -a col
do
  echo "col1:${col[0]} col2:${col[1]} col3:${col[2]}"
done < $1

#!/bin/bash
while IFS=, read -a col
do
  for c in ${col[@]}
  do
    echo "loop:$c"
  done

  unset col[2]
  col+=(lastcol)

  echo "${col[@]}"
  echo "${col[@]:1}"
  echo "${col[@]/#/col:}"
done < $1

$ ./hoge.sh hoge.csv 
loop:a1
loop:a2
loop:a3
a1 a2 lastcol
a2 lastcol
col:a1 col:a2 col:lastcol
loop:b1
loop:b2
loop:b3
b1 b2 lastcol
b2 lastcol
col:b1 col:b2 col:lastcol
loop:c1
loop:c2
loop:c3
c1 c2 lastcol
c2 lastcol
col:c1 col:c2 col:lastcol
$ 

 #!/bin/bash

while read -a col
do
  echo "col1:${col[0]} col2:${col[1]} col3:${col[2]}"
done < $1

$ cat hoge.ssv
a1 a2 a3
b1  b3
  c3
$ 

$ ./hoge.sh hoge.ssv
col1:a1 col2:a2 col3:a3
col1:b1 col2:b3 col3:
col1:c3 col2: col3:
$ 

 #!/bin/bash

IFS=,
while read line
do
  col=(${line// /,})
  echo "col1:${col[0]} col2:${col[1]} col3:${col[2]}"
done < $1

#!/bin/bash

IFS=,
while read line
do
  col=(${line//$'\t'/,})
  echo "col1:${col[0]} col2:${col[1]} col3:${col[2]}"
done < $1

 #!/bin/bash

while IFS=, read -a col
do
  echo "col1:${col[0]} col2:${col[1]} col3:${col[2]}"
done < <(tac $1)

$ cat hoge.csv 
a1,a2,a3
b1,b2,b3
c1,c2,c3
$ 

$ ./hoge.sh hoge.csv 
col1:c1 col2:c2 col3:c3
col1:b1 col2:b2 col3:b3
col1:a1 col2:a2 col3:a3
$ 

$ awk -F, '{print "col1:"$1,"col2:"$2,"col3:"$3}' hoge.csv
col1:a1 col2:a2 col3:a3
col1:b1 col2:b2 col3:b3
col1:c1 col2:c2 col3:c3
$ 

{
  print "col1:"$1,"col2:"$2,"col3:"$3
}

$ awk -F, -f hoge.awk hoge.csv 
col1:a1 col2:a2 col3:a3
col1:b1 col2:b2 col3:b3
col1:c1 col2:c2 col3:c3
$ 

$ awk -F'[. ]' '{print "col1:"$1,"col2:"$2,"col3:"$3}' hoge.ssv
col1:a1 col2:a2 col3:a3
col1:b1 col2: col3:b3
col1: col2: col3:c3
$ 

$ awk -F'[.\t]' '{print "col1:"$1,"col2:"$2,"col3:"$3}' hoge.tsv 
col1:a1 col2:a2 col3:a3
col1:b1 col2: col3:b3
col1: col2: col3:c3
$