java - 使用 httpclient 有没有办法通过 HEAD 请求获取页面的字符集？

Question

我正在使用 httpclient 库执行基本的 HEAD 请求。我很好奇如何获得 apache 返回的字符集，例如:utf-8、iso-8859-1 等...谢谢!

  HttpParams httpParams = new BasicHttpParams();
  HttpConnectionParams.setConnectionTimeout(httpParams, 2000);
  HttpConnectionParams.setSoTimeout(httpParams, 2000);

  DefaultHttpClient httpclient = new DefaultHttpClient(httpParams);
  httpclient.getParams().setParameter("http.useragent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");

  HttpContext localContext = new BasicHttpContext();
  httpget = new HttpHead(url); 

  HttpResponse response = httpclient.execute(httpget, localContext);

  this.sparrowResult.statusCode = response.getStatusLine().getStatusCode();

工作结果已更新

Header contentType = response.getFirstHeader("Content-Type");
String charset= contentType.getValue();

Answer 1

如果使用 HttpClient 4.2

import java.nio.charset.Charset;
import org.apache.http.entity.ContentType;

ContentType contentType = ContentType.getOrDefault(entity);
Charset charSet = contentType.getCharset();