直接上代码：

HttpUrlConnection使用代理：

private static HttpURLConnection getConnection(URL url, String method, String ctype)            throws IOException {        HttpURLConnection conn;        if (hasProxy) {            Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));            conn = (HttpURLConnection)url.openConnection(proxy);        } else {            conn = (HttpURLConnection) url.openConnection();        }        conn.setDoInput(true);        conn.setDoOutput(true);        conn.setRequestMethod(method);        conn.setRequestProperty("Content-Type", "application/json");        conn.setRequestProperty("Connection", "Keep-Alive");        return conn;    }

https：

private static HttpsURLConnection getConnectionHttps(URL url, String method, String ctype)            throws IOException {        SSLContext sslContext = null;        try {            sslContext = SSLContext.getInstance("TLS"); // 或SSL            X509TrustManager[] xtmArray = new X509TrustManager[]{
     new myX509TrustManager()};            sslContext.init(null, xtmArray, new java.security.SecureRandom());        } catch (GeneralSecurityException e) {            e.printStackTrace();        }        if (sslContext != null) {            HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());        }        HttpsURLConnection.setDefaultHostnameVerifier(new myHostnameVerifier());        HttpsURLConnection conn;        if (hasProxy) {            Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));            conn = (HttpsURLConnection)url.openConnection(proxy);        } else {            conn = (HttpsURLConnection) url.openConnection();        }        conn.setDoInput(true);        conn.setDoOutput(true);        conn.setRequestMethod(method);        conn.setRequestProperty("Content-Type", ctype);        conn.setRequestProperty("Connection", "Keep-Alive");        return conn;    }

httpClent:

RequestConfig requestConfig = null;            if(StringUtil.isEmpty(proxyHost)){                requestConfig = RequestConfig.custom()                        .setSocketTimeout(connectTimeout)                        .setConnectTimeout(connectTimeout)                        .build();            }else{    //代理                HttpHost proxy = new HttpHost(proxyHost,proxyPort);                requestConfig = RequestConfig.custom()                        .setProxy(proxy)                        .setSocketTimeout(connectTimeout)                        .setConnectTimeout(connectTimeout)                        .build();            }

共同代码：

private static String proxyHost;    private static int proxyPort;    private static boolean hasProxy = false;    public void setProxy(String proxyHost,int proxyPort) {        this.proxyHost = proxyHost;        this.proxyPort = proxyPort;        hasProxy = true;    }