Bash Shell 字符串切割

2015-04-03  ·  1 分钟阅读  ·  Shell

基础示例

AAA="hello First-of All"
echo ${AAA#*-}     # 输出: of All

AAA=111-222
echo ${AAA%-*}     # 输出: 111
echo ${AAA#*-}     # 输出: 222

变量匹配切割

AA="a bc d ef"
BB="d"
echo ${AA%%$BB*}   # 输出: a bc
echo ${AA#*$BB}    # 输出: ef

子串截取

AAA=abcdef
echo ${AAA:2}      # 输出: cdef
echo ${AAA: -2}    # 输出: ef
echo ${AAA::2}     # 输出: ab

实际应用

value="L(50000:10000)"
FORM_LONG_LEFT_TIME_TALK=$value
FORM_LONG_TIME_TALK=${FORM_LONG_LEFT_TIME_TALK%:*}
FORM_LONG_TIME_TALK=${FORM_LONG_TIME_TALK#*(}
FORM_LONG_TIME_TALK=`expr ${FORM_LONG_TIME_TALK} / 1000`
FORM_LEFT_TIME_TALK=${FORM_LONG_LEFT_TIME_TALK#*:}
FORM_LEFT_TIME_TALK=${FORM_LEFT_TIME_TALK%)*}
FORM_LEFT_TIME_TALK=`expr ${FORM_LEFT_TIME_TALK} / 1000`

#shell-scripting