用HtppClient下载一个网页的完整代码，htppclient代码, import java

用HtppClient下载一个网页的完整代码，htppclient代码, import java

 import java.io.IOException;  import java.io.InputStream;  import java.io.PrintWriter;  import java.io.Writer;  import java.util.Scanner;  import org.apache.http.HttpEntity;  import org.apache.http.HttpStatus;  import org.apache.http.client.ClientProtocolException;  import org.apache.http.client.methods.CloseableHttpResponse;  import org.apache.http.client.methods.HttpGet;  import org.apache.http.impl.client.CloseableHttpClient;  import org.apache.http.impl.client.HttpClients;  public class DownloadWebPage{      public static void downloadPagebyGetMethod() throws IOException {          // 1、通过HttpGet获取到response对象          CloseableHttpClient httpClient = HttpClients.createDefault();          HttpGet httpGet = new HttpGet("http://www.baidu.com/");          CloseableHttpResponse response = httpClient.execute(httpGet);          InputStream is = null;          Scanner sc = null;          Writer os = null;          if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {              try {                  // 2、获取response的entity。                  HttpEntity entity = response.getEntity();                  // 3、获取到InputStream对象，并对内容进行处理                  is = entity.getContent();                  sc = new Scanner(is);                  // String filename = path.substring(path.lastIndexOf('/')+1);                  String filename = "2.txt";                  os = new PrintWriter(filename);                  while (sc.hasNext()) {                      os.write(sc.nextLine());                  }              } catch (ClientProtocolException e) {                  e.printStackTrace();              } finally {                  if (sc != null) {                      sc.close();                  }                  if (is != null) {                      is.close();                  }                  if (os != null) {                      os.close();                  }                  if (response != null) {                      response.close();                  }              }          }      }      public static void main(String[] args) {          try {              downloadPagebyGetMethod();          } catch (IOException e) {              e.printStackTrace();          }      }  }