URL,URLConnection,HttpURLConnection的简单应用

package com.cnse.urlDemo;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
/**
* URL,URLConnection,HttpURLConnection的简单
* @author kxw
*/
public class UrlDemo {
public static void main(String[] args) throws IOException {
//简单的url操作获取
URL url=new URL("http://www.sohu.com/");
//获取url的io流操作
InputStream inputStream=url.openStream();
InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
//urlconnection获取输入流
URLConnection urlConnection=url.openConnection();
InputStream inputStream2=urlConnection.getInputStream();
//http通道httpurlconnection
HttpURLConnection httpURLConnection=(HttpURLConnection)urlConnection;
//设置从http读取写入
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
//设置请求方法
httpURLConnection.setRequestMethod("POST");
//http通道连接
httpURLConnection.connect();
InputStream inputStreamReader2=httpURLConnection.getInputStream();
}
}