shell编程高级3

二、case结构条件句
1、语法格式
case “字符串变量” in

值1) 指令1…

;;

值2|值3|值4) 指令2…

;;

*) 指令…

esac

2、示例
（1）示例1：根据用户的选择输入，判断是哪种水果并加上不同颜色
a、给字符串加颜色

vi /services/scripts/echo-color01.sh

echo -e “\033[30m BlackFont : this is blackfont \033[0m”

echo -e “\033[31m RedFont : this is redfont \033[0m”

echo -e “\033[32m GreenFont : this is greenfont \033[0m”

echo -e “\033[33m YellowFont : this is yellowfont \033[0m”

echo -e “\033[34m BlueFont : this is bluefont \033[0m”

echo -e “\033[35m PurpleFont : this is purplefont \033[0m”

echo -e “\033[36m SkyBlueFont: this is skybluefont\033[0m”

echo -e “\033[37m WhiteFont : this is whitefont \033[0m”

vi /services/scripts/echo-color02.sh

#!/bin/sh

RED_COLOR=’\E[1;31m’

GREEN_COLOR=’\E[1;32m’

YELLOW_COLOR=’\E[1;33m’

BLUE_COLOR=’\E[1;34m’

PINK_COLOR=’\E[1;35m’

RES=’\E[0m’

echo -e “ ${RED_COLOR}========red color=========${RES}”

echo -e “ ${YELLOW_COLOR}======yellow color=========${RES}”

echo -e “ ${BLUE_COLOR}========blue color=========${RES}”

echo -e “ ${GREEN_COLOR}=======green color=========${RES}”

echo -e “ ${PINK_COLOR}========pink color=========${RES}”

b、完整脚本

vi /services/scripts/fruitmenu.sh

#!/bin/sh

RED_COLOR=’\E[1;31m’

GREEN_COLOR=’\E[1;32m’

YELLOW_COLOR=’\E[1;33m’

BLUE_COLOR=’\E[1;34m’

RES=’\E[0m’

menu(){

cat <<END

==========================

1  apple

2  pear

3 banana

4 exit

=============================

END

}

while true

do

menu

read -p "please ipunt your choice: " -t 10 fruit

case “$fruit” in

1)

  echo -e"${RED_COLOR} apple ${RES}"

  ;;

2)

  echo -e"${GREEN_COLOR} pear ${RES}"

  ;;

3)

  echo -e"${YELLOW_COLOR} banana ${RES}"

  ;;

4)

  exit 0

  ;;



*)

  echo "no fruit youchoose"

  ;;

esac