URL简单例子
代码例子：

package com.test;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.net.URL;public class URLConnectionTest{public static void main(String[] args) throws Exception{URL url = new URL("http://www.infoq.com");InputStream in = url.openStream();OutputStream os = new FileOutputStream("C:/3.txt");byte[] buffer = new byte[2048];int length = 0;while (-1 != (length = in.read(buffer, 0, buffer.length))){//String str = new String(buffer,0,length);//System.out.println(str);os.write(buffer,0,length);}os.close();in.close();}}