使用Java爬取网页的源码

package com;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;

public class Inet {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub

		
		try {
			URL url= new URL("https://www.csdn.net");
			InputStream input= url.openStream();
			FileOutputStream fout= new FileOutputStream(new File(".\\FirstPage.html"));//打开一个文件用来存储爬取的源码
			int a= 0;
			while(a> -1) {
				a= input.read();
				fout.write(a);  //写入文件
			}
			fout.close();
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}