HttpClient4.1.2 & HtmlUnit2.9 处理文件下载

TestCode

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

public class DownloadHelper {
	public static void HttpClientDownload(String remoteFile) {
		HttpClient client = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(remoteFile);
		try {
			HttpResponse response = client.execute(httpGet);

			InputStream in = response.getEntity().getContent();

			FileOutputStream out = new FileOutputStream(new File("C:\\log\\123.xls"));

			byte[] b = new byte[1024];
			int len = 0;
			while ((len = in.read(b)) != -1) {
				out.write(b, 0, len);
			}
			in.close();
			out.close();

		} catch (IOException e) {
			e.printStackTrace();
		} 
	}
	
	public static void HtmlUnitDownload(String remoteFile) {
		try {
            final WebClient webClient = new WebClient();
            InputStream in  = webClient.getPage(remoteFile).getWebResponse().getContentAsStream();

			FileOutputStream out = new FileOutputStream(new File("C:\\log\\report.xls"));

			byte[] b = new byte[1024];
			int len = 0;
			while ((len = in.read(b)) != -1) {
				out.write(b, 0, len);
			}
			in.close();
			out.close();

		} catch (IOException e) {
			e.printStackTrace();
		} 
	}
}