Java实现抓取网页图片

场景如下：

业务需要，有一批返回图片列表，存放在文本文档中，分行URL

通过Java程序将数据读取到本地磁盘（更进一步可以考虑不抛出异常，而是判断返回码）

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

public class ReadFileFromTxt {

    public void readFile(String filePath) {
        try {
            BufferedReader in = new BufferedReader(new FileReader(filePath));
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void readFile2(String filePath) {

        BufferedReader br;
        String read = "";
        try {
            File file = new File(filePath);
            FileReader fileread = new FileReader(file);
            br = new BufferedReader(fileread);
            while ((read = br.readLine()) != null) {
                read = read.substring(1);
                String[] reads = read.split("    ");
                read = reads[0].trim();
                read = read + "0";
                makeImg(read);
                System.out.print(read + "\t\n");
            }
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }

    public static void makeImg(String url) {
        try {
            BufferedInputStream in = new BufferedInputStream(
                    new URL(url).openStream());
            int index = url.lastIndexOf("/");
            String sName = url.substring(index, url.length())
                    + url.substring(50, 65);
            System.out.println("sName = " + sName);
            File img = new File("E:\\pic\\" + sName + ".jpg");
            BufferedOutputStream out = new BufferedOutputStream(
                    new FileOutputStream(img));
            byte[] buf = new byte[2048];
            int length = in.read(buf);
            while (length != -1) {
                out.write(buf, 0, length);
                length = in.read(buf);
            }
            in.close();
            out.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String filePath = "E:\\picurl2.txt";
        // new ReadFileFromTxt().readFile(filePath);
        new ReadFileFromTxt().readFile2(filePath);
    }
}