假设您实际上在谈论HttpClient，这是一个SSCCE：
package com.stackoverflow.q2633002;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;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 Test { public static void main(String... args) throws IOException { System.out.println("Connecting..."); HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet("http://apache.cyberuse.com/httpcomponents/httpclient/binary/httpcomponents-client-4.0.1-bin.zip"); HttpResponse response = client.execute(get); InputStream input = null; OutputStream output = null; byte[] buffer = new byte[1024]; try { System.out.println("Downloading file..."); input = response.getEntity().getContent(); output = new FileOutputStream("/tmp/httpcomponents-client-4.0.1-bin.zip"); for (int length; (length = input.read(buffer)) > 0;) { output.write(buffer, 0, length); } System.out.println("File successfully downloaded!"); } finally { if (output != null) try { output.close(); } catch (IOException logOrIgnore) {} if (input != null) try { input.close(); } catch (IOException logOrIgnore) {} } }}在这里工作正常。您的问题出在其他地方。
