//忽略SSL验证

    public static void ignoreSSL() throws NoSuchAlgorithmException, KeyManagementException {

        SSLContext sslContext = SSLContext.getInstance("TLS");

        TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {

            @Override

            public void checkClientTrusted(java.security.cert.X509Certificate[] x509Certificates, String s) {}

 

            @Override

            public void checkServerTrusted(java.security.cert.X509Certificate[] x509Certificates, String s) {}

 

            @Override

            public java.security.cert.X509Certificate[] getAcceptedIssuers() {

                return null;

            }

        }};

        sslContext.init(null, trustManagers, new java.security.SecureRandom());

        HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());

    }

 

    public static void main(String[] args) throws Exception {

        ignoreSSL();

        // 创建URL对象

        URL url = new URL("https://lmg.jj20.com/up/allimg/4k/s/02/2109250006343S5-0-lp.jpg");

 

        // 打开连接

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

 

        // 设置请求头参数

        connection.setRequestMethod("GET");

        connection.setRequestProperty("User-Agent", "Mozilla/5.0");

 

        // 发送请求

        int responseCode = connection.getResponseCode();

 

        // 读取响应

        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

        String line;

        StringBuilder response = new StringBuilder();

        while ((line = reader.readLine()) != null) {

            response.append(line);

        }

        reader.close();

 

        // 输出响应

        System.out.println("Response Code: " + responseCode);

        System.out.println("Response Body: " + response.toString());

 

        // 关闭连接

        connection.disconnect();

    }