不每次都传递上下文很难做到这一点，但是你可以使用请求拦截器来做到这一点。这是我们使用的一些代码（从JIRA iirc中找到）：
// Pre-emptive authentication to speed things upBasicHttpContext localContext = new BasicHttpContext();BasicScheme basicAuth = new BasicScheme();localContext.setAttribute("preemptive-auth", basicAuth);httpClient.addRequestInterceptor(new PreemptiveAuthInterceptor(), 0);(...)static class PreemptiveAuthInterceptor implements HttpRequestInterceptor { public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException { AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE); // If no auth scheme avaialble yet, try to initialize it // preemptively if (authState.getAuthScheme() == null) { AuthScheme authScheme = (AuthScheme) context.getAttribute("preemptive-auth"); CredentialsProvider credsProvider = (CredentialsProvider) context.getAttribute(ClientContext.CREDS_PROVIDER); HttpHost targetHost = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST); if (authScheme != null) { Credentials creds = credsProvider.getCredentials(new AuthScope(targetHost.getHostName(), targetHost.getPort())); if (creds == null) { throw new HttpException("No credentials for preemptive authentication"); } authState.setAuthScheme(authScheme); authState.setCredentials(creds); } } }}
