shell脚本批量下载网页中图片

#!/bin/bash
#
# Decription:
#    A Shell script used to download the imges from Internet.
# Author:
#    Long Luo
# Date:
#    2014-09-11 00:16:59
#
 
BASE_URL="https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/"
 
# declare STIRNG variable
STRING="Beginning Image download..."
 
#print var on screen
echo $STRING
 
sleep 1
echo "...."
 
BIG_PNG="ds.png"
PNG=".png"
 
echo "url="${BASE_URL}
echo "big png="${BIG_PNG}
 
for ((i=0; i<49;i++)); do
  echo IMG_URL=${BASE_URL}${i}${BIG_PNG}
  echo "final url="${IMG_URL}
 
  curl ${BASE_URL}${i}${BIG_PNG} -o small/${i}${PNG}
  sleep 1
 
done
 

# Method 2
 
URL_ARRAY=(
'https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/0d.png'
'https://s.yimg.com/zz/combo?a/i/us/nws/weather/gr/1d.png'
)
 
NAME_ARRAY=(
'file1.jpg'
'file2.jpg'
)
 
ELEMENTS=${#URL_ARRAY[@]}
 
for (( i=0;i<ELEMENTS;i++)); do
  echo ${URL_ARRAY[${i}]}
  echo "saved as ${NAME_ARRAY[${i}]}"
  curl ${URL_ARRAY[${i}]} -o images/${NAME_ARRAY[${i}]}
  sleep 1
 
done