正则表达式匹配多次出现的内容，并且提取

Question

我想提取html中的img的src中的内容，匹配是否有img，如果有全部的src都提取出来，请大神赐教。(用java处理)

这个是测试图片1<img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_hahaha.png" alt="">
这个是测试图片2<img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_lalala.png" alt="">

Answer 1

正则表达式来实现，当然我使用php语言实现

$body = '<img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_hahaha.png" alt=""><img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_lalala.png" alt="">';
$imgreg = "/<img src=\"(.*?)\"/";
if(preg_match_all($imgreg, $body, $matches)){
    var_dump($matches[1]);
}

Answer 2

把楼上代码转换成js

var body = '<img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_hahaha.png" alt=""><img src="file:///storage/emulated/0/DCIM/Screenshots/Screenshot_lalala.png" alt="">'

var sources = []
var imgReg = /<img src=\"(.*?)\"/g
var match
while((match = imgReg.exec(body))){
    sources.push(match[1])
}
console.log(sources)

Answer 3

import re
f = open('a.txt').read()
print(re.findall('(?<=img src=")([^"]+)',f))

rt
用python写一遍