如何用网络获取Html代码？网络获取Html代码原理

如何用网络获取Html代码？下面小编带来一篇网络获取Html代码原理，仅供参考作用

package cn.captain.html;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class htmlRequest {
/**
 * @param args
 * @throws MalformedURLException 
 */
public static void main(String[] args) throws Exception
{
URL url = new URL("http://www.baidu.com/"); 
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5 * 1000);
InputStream inStream =  conn.getInputStream();//通过输入流获取html数据
byte[] data = readInputStream(inStream);//得到html的二进制数据
String html = new String(data);
System.out.println(html);
}
   public static byte[] readInputStream(InputStream instream) throws Exception
    {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[]  buffer = new byte[1204];
int len = 0;
while ((len = instream.read(buffer)) != -1)
{
outStream.write(buffer,0,len);
}
instream.close();
return outStream.toByteArray();     
}
}

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