您需要输出流吗?HttpURLConnection 绝对支持使用 Authenticator 类进行身份验证，请参阅:Http 身份验证.

Do you need output streaming? The HttpURLConnection most definitely supports authentication with the Authenticator class, see: Http Authentication.

更新:如果 Authenticator 不是一个选项，您可以通过向您的 HTTP 请求添加一个额外的标头来手动进行 HTTP 基本身份验证.尝试以下代码(未经测试):

Update: In case the Authenticator is not an option, you can manually do HTTP basic authentication by adding an extra header to your HTTP request. Try the following code (untested):

String userPassword = username + ":" + password;
String encoding = new sun.misc.BASE64Encoder().encode(userPassword.getBytes());
URLConnection uc = url.openConnection();
uc.setRequestProperty("Authorization", "Basic " + encoding);
uc.connect();