带有 UnsupportedOperationException 的 InternalHttpClient.getParams()

Question

我写了一个JAVA爬虫并尝试使用proxy并忽略任何https certification。

但它不适用于

java.lang.UnsupportedOperationException （在 org.apache.http.impl.client.InternalHttpClient.getParams）

我搜索的解决方案大多说我的HttpClient的版本是旧的，但是我从apache网站更新到最新版本，这个异常仍然发生。

以下代码是我的爬虫代码：

public static void main(String[] args) {
    try{
        TrustManager[] trustAllCerts = new TrustManager[] {
            new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() {
                        return null;
                    }
                public void checkClientTrusted(X509Certificate[] certs, String authType) {}
                public void checkServerTrusted(X509Certificate[] certs, String authType) {}
                }
        };
        SSLContext ctx = SSLContext.getInstance("TLS");
        ctx.init(null, trustAllCerts, null);
        LayeredConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(ctx);
        CloseableHttpClient client = HttpClients.custom().setSSLSocketFactory(sslSocketFactory).build();            
        HttpHost proxy = new HttpHost("127.0.0.1", 8888,"http");
        client.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,proxy);
        HttpGet request = new HttpGet("https://www.javaworld.com.tw/jute/post/view?bid=29&id=312144");
        CloseableHttpResponse response = client.execute(request);
        String entity = EntityUtils.toString(response.getEntity(), "utf-8");
        System.out.println(entity);
    }catch (Exception e) {
        e.printStackTrace();
    }
}

非常感谢任何解决方案。

Answer 1

我遇到了同样的问题，这是因为该方法已被弃用并且在最新版本中不可用。

我尝试了下面的代码，它对我有用

        public static HttpClient createClient() {
        try {
            SSLContextBuilder builder = new SSLContextBuilder();
            builder.useProtocol("TLSv1.2");
            builder.loadTrustMaterial(null, new TrustStrategy() {
                @Override
                public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                    return true;
                }
            });
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                    builder.build());

            HttpClientBuilder hcBuilder = HttpClients.custom();
            HttpHost httpProxy = new HttpHost(bundle.getString("PROXY_HOST"), Integer.parseInt(bundle.getString("PROXY_PORT")));
            DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(httpProxy);
            hcBuilder.setRoutePlanner(routePlanner);

            CloseableHttpClient httpclient = hcBuilder
                    .setSSLSocketFactory(sslsf).build();

            return httpclient;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }