try {
            fout = new FileOutputStream("d://temp//1.html");
            URL conn= new URL("http://www.sina.com/");
            InputStream in=conn.openStream();
            int n=in.available();
            byte[] buf=new byte[1024];
            while((n=in.read(buf)) >=0){
                System.out.write(buf,0,n);
                fout.write(buf);
            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(fout != null) {
                try {
                    fout.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        }

------解决方案--------------------
package demo;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.URL;

public class IoTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		InputStream is = null;
		String str = new String();
		FileWriter fw = null;
		BufferedWriter bw = null;
		InputStreamReader isr = null;
		BufferedReader br = null;
		try {
			URL url = new URL("http://www.sina.com/");
			is = url.openStream();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}catch(IOException e1){
			e1.printStackTrace();
		}
		isr = new InputStreamReader(is);
		br = new BufferedReader(isr);
		try {
			fw = new FileWriter("D:\\test\\1.html");
			bw = new BufferedWriter(fw);
			while((str = br.readLine())!=null){
				System.out.println(str);
				bw.write(str);
				bw.newLine();
				bw.flush();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				bw.close();
				fw.close();
				br.close();
				isr.close();
				is.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}