HtmlSaveUtil.java

import java.io.*;
import java.net.URL;

public class HtmlSaveUtil {

    public static void saveHtml(String filepath, String str) throws IOException {
        //字节输出流
        FileOutputStream fos = new FileOutputStream(new File(filepath));
        //接收字节输入流
        InputStream is =  new URL(str).openStream();
        //为字节输入流加缓冲
        BufferedInputStream bis = new BufferedInputStream(is);
        //为字节输出流加缓冲
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        int length;
        byte[] bytes = new byte[1024*20];
        while((length = bis.read(bytes, 0, bytes.length)) != -1){
            fos.write(bytes, 0, length);
        }
        bos.close();
        fos.close();
        bis.close();
        is.close();
    }

    public static void main(String[] args) throws IOException {
        String url="https://blog.csdn.net/qq_35387940/article/details/129611551";
        HtmlSaveUtil.saveHtml("D:\\blog\\129611551.html",url);

    }

}

运行main方法， 效果：

 看一眼，可以看到整个网页的代码：

好了，就到这。