http和https连接下载

给一个可以下载的http地址和https地址，分别用不同的方式来下载，https需要SSL证书，
另外呢，http和https如何转换? 不要用https来访问http
解决了蛮久的，最后发现是网络原因，外网连接不上，所以联调的时候，用内网和外网分别请求，先排除网络原因.
(为啥没想到断开网络用外网连接请求呢?感觉思路啊,还是得多训练这种思维和处理问题的方式)/*** 获取网络图片流** @param url* @return*/
public static byte[] getNetWorkStream(String url) {HttpURLConnection connection=null;try {connection = (HttpURLConnection) new URL(url).openConnection();connection.setReadTimeout(5000);connection.setConnectTimeout(5000);connection.setRequestMethod("GET");if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {InputStream inputStream = connection.getInputStream();byte[] bytes= IOUtils.toByteArray(inputStream);inputStream.close();return bytes;}} catch (IOException e) {log.error("获取网络图片出现异常，图片路径为：" ,e);}finally {if(connection!=null){connection.disconnect();}}return null;
}/*** 获取网络图片流头部的文件名后缀* resultMap: key[fileName、bytes]* @param url* @return*/
public static Map<String,Object> getNetWorkStreamAndFileName(String url) {HttpURLConnection connection=null;int responseCode = -100 ;Map resultMap = new HashMap();try {connection = (HttpURLConnection) new URL(url).openConnection();connection.setReadTimeout(5000);connection.setConnectTimeout(5000);connection.setRequestMethod("GET");responseCode = connection.getResponseCode() ;if (responseCode == HttpURLConnection.HTTP_OK) {String  fileName = connection.getHeaderField("Content-Disposition");if(fileName != null){fileName = new String(fileName.getBytes("ISO-8859-1"),"GBK").split("=")[1];}InputStream inputStream = connection.getInputStream();byte[] bytes= IOUtils.toByteArray(inputStream);if(StringUtils.isEmpty(fileName)){fileName=url.substring(url.lastIndexOf("/")+1);}resultMap.put("fileName",fileName);resultMap.put("bytes",bytes);inputStream.close();return resultMap;}} catch (IOException e) {log.error("获取网络文件出现异常，网络路径为：" ,e);}finally {log.info("请求连接的返回的响应码ResponseCode："+responseCode);if(connection!=null){connection.disconnect();}}return null;
}/*** 获取网络图片流** @param url* @return*/
public static byte[] getNetWorkStreamHttps(String url) throws IOException, NoSuchProviderException, NoSuchAlgorithmException {SSLContext sslcontext = SSLContext.getInstance("SSL","SunJSSE");try {sslcontext.init(null, new TrustManager[]{new MyX509TrustManager()}, new java.security.SecureRandom());} catch (KeyManagementException e) {e.printStackTrace();}HostnameVerifier ignoreHostnameVerifier = new HostnameVerifier() {@Overridepublic boolean verify(String s, SSLSession sslsession) {System.out.println("WARNING: Hostname is not matched for cert.");return true;}};URL myURL = new URL(url);// 创建HttpsURLConnection对象，并设置其SSLSocketFactory对象HttpsURLConnection connection = (HttpsURLConnection) myURL.openConnection();connection.setSSLSocketFactory(sslcontext.getSocketFactory());connection.setHostnameVerifier(ignoreHostnameVerifier);try {connection.setReadTimeout(5000);connection.setConnectTimeout(5000);connection.setRequestMethod("GET");if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {InputStream inputStream = connection.getInputStream();byte[] bytes= IOUtils.toByteArray(inputStream);inputStream.close();return bytes;}} catch (IOException e) {log.error("获取网络图片出现异常，图片路径为：" ,e);}finally {if(connection!=null){connection.disconnect();}}return null;
}/*** 获取网络图片流头部的文件名后缀* resultMap: key[fileName、bytes]* @param url* @return*/
public static Map<String,Object> getNetWorkStreamAndUrlFileName(String url) throws IOException, NoSuchProviderException, NoSuchAlgorithmException {SSLContext sslcontext = SSLContext.getInstance("SSL","SunJSSE");try {sslcontext.init(null, new TrustManager[]{new MyX509TrustManager()}, new java.security.SecureRandom());} catch (KeyManagementException e) {e.printStackTrace();}HostnameVerifier ignoreHostnameVerifier = new HostnameVerifier() {@Overridepublic boolean verify(String s, SSLSession sslsession) {System.out.println("WARNING: Hostname is not matched for cert.");return true;}};URL myURL = new URL(url);// 创建HttpsURLConnection对象，并设置其SSLSocketFactory对象HttpsURLConnection connection = (HttpsURLConnection) myURL.openConnection();connection.setSSLSocketFactory(sslcontext.getSocketFactory());connection.setHostnameVerifier(ignoreHostnameVerifier);//之后任何Https协议网站皆能正常访问，同第一种情况//HttpURLConnection connection=null;int responseCode = -100 ;Map resultMap = new HashMap();try {//connection = (HttpURLConnection) new URL(url).openConnection();connection.setReadTimeout(5000);connection.setConnectTimeout(5000);connection.setRequestMethod("GET");responseCode = connection.getResponseCode() ;if (responseCode == HttpURLConnection.HTTP_OK) {String  fileName = connection.getHeaderField("Content-Disposition");if(fileName != null){fileName = new String(fileName.getBytes("ISO-8859-1"),"GBK").split("=")[1];}InputStream inputStream = connection.getInputStream();byte[] bytes= IOUtils.toByteArray(inputStream);if(StringUtils.isEmpty(fileName)){fileName=url.substring(url.lastIndexOf("/")+1);}resultMap.put("fileName",fileName);resultMap.put("bytes",bytes);inputStream.close();return resultMap;}} catch (IOException e) {log.error("获取网络文件出现异常，网络路径为：" ,e);}finally {log.info("请求连接的返回的响应码ResponseCode："+responseCode);if(connection!=null){connection.disconnect();}}return null;
}public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException, IOException {String url = "";byte[] a = CommonUtils.getNetWorkStreamHttps(url);System.out.println(a);
}

public class MyX509TrustManager implements X509TrustManager {@Overridepublic void checkClientTrusted(X509Certificate certificates[],String authType) throws CertificateException {}@Overridepublic void checkServerTrusted(X509Certificate[] ax509certificate,String s) throws CertificateException {}@Overridepublic X509Certificate[] getAcceptedIssuers() {// TODO Auto-generated method stubreturn null;}
}

还是连接超时，最后找到问题根源是因为信息安全做了域名限制策略，只能用域名访问而不能用ip，但是银行方用的是ip访问所以连接不上

这种问题要找到运维和信息安全处理，了解行方访问方式是用ip的，

通过断开网络和连接网络来反复测试，telnet ip 端口不行，telnet 域名端口可以，

ok 解决了~

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