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我正在编写一个 Java 程序，该程序使用此代码连接到 Web 服务器（HTTPS 并且需要用户名/密码），但是当它到达execute调用时它挂起：

KeyStore trustStore  = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream instream = new FileInputStream(new File("D:/jssecacerts"));
try {
    trustStore.load(instream, "certspassword".toCharArray());
} finally {
    try { instream.close(); } catch (Exception ignore) {}
}

SSLSocketFactory socketFactory = new SSLSocketFactory(trustStore);
Scheme sch = new Scheme("https", 443, socketFactory);
httpclient.getConnectionManager().getSchemeRegistry().register(sch);

HttpGet httpget = new HttpGet("https://server/path/default.aspx");

httpclient.getCredentialsProvider().setCredentials(
    new AuthScope("server", 443),
    new UsernamePasswordCredentials("user", "pass"));

System.out.println("executing request" + httpget.getRequestLine());

HttpResponse response = httpclient.execute(httpget);

这是我为隔离问题所做的尝试：

  • 如果我注释掉该setCredentials行，它不会挂起，服务器会立即返回HTTP/1.1 401 Unauthorized响应
  • 我是否提供有效的用户名/密码并不重要
  • 我尝试使用不同的方法指定超时，但超时间隔结束后它仍然挂起
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