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package chapter15;

import java.io.*;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import static java.lang.System.out;

/**

* 过滤得到img

*/

public class FilterImg {

public static void main(String[] args) throws IOException {

String fileName = ".../coffee.html";

InputStreamReader reader = new InputStreamReader(new FileInputStream(fileName), "UTF-8");

StringBuilder buffer = new StringBuilder();

while (reader.ready()) {

buffer.append((char)reader.read());

}

reader.close();

String htmlStr = buffer.toString();

String regex = "<a[^>].*?>(<img[^>].*?>)<\\/a>";

Pattern pattern = Pattern.compile(regex);

Matcher matcher = pattern.matcher(htmlStr);

while (matcher.find()) {

out.printf(" \"%s\"\n", matcher.group(1));

}

}

}