shell脚本实现字符串的动态替换方法

var=${var//小草/真是让人印象深刻}
var=${var//小狗/可爱的}
var=${var//你听清楚了吗/我说明白了吗}
var=${var//我不会/我可以学}
var=${var//打麻将/修长城}
var=${var//打游戏/计算机实践练习}

#!/bin/bash
# ------------------------------------------
# Filename    : ReplaceStr.sh
# Version     : 1.1
# Date        : 2022-10-23 16:04:25
# Author      : 农民工老王@CSDN
# Email       : scwja@qq.com
# Website     : https://blog.csdn.net/monarch91
# Description : 用于追踪文件变化的脚本
# ------------------------------------------

needReplaceStr="$1"
listPath="$2"
if [ ! -f "${listPath}" ]; then
  echo "错误：脚本文件缺失！"
else
  IfsTemp=$IFS
  IFS=$';'
  fileList=$(cat "${listPath}"|xargs)
  fileArray=(${fileList})
  for item in "${fileArray[@]}"
  do
    itemLengthStr=$(echo ${item}|wc -L)
    itemLength=$((${itemLengthStr}))
    if [ ${itemLength} -gt 3  ] && [ "${item:0:1}" != "#" ]; then
      v=(${item//:/;})
      srcStr="${v[0]:1}"
      tarStr="${v[1]}"
      needReplaceStr=${needReplaceStr//${srcStr}/${tarStr}}
      needReplaceStr=${needReplaceStr//${srcStr^^}/${tarStr^^}}
      needReplaceStr=${needReplaceStr//${srcStr,,}/${tarStr,,}}
    fi
  done
  IFS=$IfsTemp
fi

echo "$needReplaceStr"

#/bin/sh
http=$1
test_conf=/SE/test.conf
Line=`cat test_conf | grep -wn "#__TEST__" | awk -F: '{print $1}'`
sed -i ''$Line'd' $test_conf
sed -i ''$Line'i '$1';#__TEST__' $test_conf