如何在OpenStack中通过Neutron-API精确插入网络ACL规则

教程大全 2026-02-25 19:28:59 浏览次

在OpenStack环境中,网络ACL（Access Control List）是一种用于控制网络流量的重要工具，通过使用Neutron API，我们可以轻松地插入网络ACL规则，从而为虚拟私有云（VPC）提供更加精细的网络访问控制，以下是如何使用Neutron API添加网络ACL规则的详细步骤和相关信息。

HttpClient和HttpURLConnection的区别

ttpClient是个开源框架，封装了访问http的请求头，参数，内容体，响应等等， HttpURLConnection是java的标准类，什么都没封装，用起来太原始，不方便HttpClient实际上是对Java提供方法的一些封装，在HttpURLConnection中的输入输出流操作，在这个接口中被统一封装成了HttpPost(HttpGet)和HttpResponse，这样，就减少了操作的繁琐性。性能方面这里做一个测试：HttpURLConnection VS HttpClient性能测试版本： HttpURLConnectionjdk1.6；HttpClient 3.0.1在项目中有一个特别小的相关应用，在选择时做了一下测试，之前先对两个类进行下说明：HttpURLConnectionjava的标准类()HttpClient Jakarta Commons HttpClient，提供对HTTP协议访问的封装，包括http的请求头，参数，内容体，响应等及多线程的应用。测试代码如下：import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;public class HttpClientTest {private static String link =static void main(String[] args) {long a = ();useHttpURlConnection();long b = ();(use httpurlconnection: +(b-a));long c = ();useHttpClient();long d = ();(use httpclient: +(d-c));}public static void useHttpURlConnection(){HttpURLConnection conn = null;URL url = null;String result = ;try {url = new (link);conn = (HttpURLConnection) ();();();InputStream urlStream = ();BufferedReader reader = new BufferedReader(new InputStreamReader(urlStream));String s = ;while ((s = ()) != null) {result += s;}(result);();();();} catch (MalformedURLException e) {();} catch (IOException e) {();} catch(Exception e){();}}public static void useHttpClient(){HttpClient client = new HttpClient();GetMethod method = new GetMethod(link);()(_HANDLER,new DefaultHttpMethodRetryHandler(3, false));try {int statuscode = (method);if (statusCode != _OK) {(Method failed: + ());}byte[] responseBody = ();(new String(responseBody));} catch (HttpException e) {(Fatal protocol violation: + ());();} catch (IOException e) {(Fatal transport error: + ());();} finally {();}}}

求助，Java中如何根据一个http接口

public void test(Long clusterId,boolean monitorSendAllFlag) {boolean result=false;try {String url =json= (url);(json);} catch (Exception e) {();}}public static String getHttpResponse(String allConfigUrl) {BufferedReader in = null;StringBuffer result = null;try {URI uri = new URI(allConfigUrl);URL url = ();URLConnection connection = ();(Content-Type, application/x-www-form-urlencoded);(Charset, utf-8);();result = new StringBuffer();//读取URL的响应in = new BufferedReader(new InputStreamReader(()));String line;while ((line = ()) != null) {(line);}return ();} catch (Exception e) {();}finally {try {if (in != null) {();}} catch (Exception e2) {();}}return null;}

从API接口获取的json数据怎么存到对象的List集合中

1. 简单的手动放置键值对到JSONObject，然后在put到JSONArray对象里List

al = (f);(());HttpServletResponse hsr = ();if(null == al){return ;}for(Article a : al){(()+()+());}JSONArray json = new JSONArray();for(Article a : al){JSONObject jo = new JSONObject();(id, ());(title, ());(desc, ());(jo);}try {(());(UTF-8);()(());} catch (IOException e) {();}复制代码上述代码JSONArray是引入的包而用包下JSONArray的静态方法：FROMObject(list) 这是网上大多是都是直接用此方法快捷转换JSON，但是对于Hibernate级联操作关联的对象，这个方法就会报错，如果将映射文件中的级联配置去掉就行了。另外对于list的要求就是其中的元素是字符串或对象，否则JSON不知道你想要的是什么数据。但是级联操作毕竟还是得存在，否则以后数据冗余、多余。解决方法就是：JSONArray subMsgs = (object, config);JsonConfig config = new JsonConfig();(new PropertyFilter() {public boolean apply(Object arg0, String arg1, Object arg2) { if ((article) ||(fans)) {return true;} else {return false;}}});复制代码说明：提供了一个过滤作用，如果遇到关联的对象时他会自动过滤掉，不去执行关联关联所关联的对象。这里我贴出我hibernate中的配置关系映射的代码帮助理解：

总结：1. JSONArray subMsgs = (subMessages, config);其中config是可选的，当出现上面的情况是可以配置config参数，如果没有上面的那种需求就可以直接使用fromObject(obj)方法，它转换出来的就是标准的json对象格式的数据，如下：{[attr, content, ...}, ...]}2. JSONObject jTmsg = (themeMessage, config);这是专门用来解析标准的pojo，或者map对象的，pojo对象的格式就不用说了，map的形式是这样的{str, str}。 Package ;import ;public class Person implements Serializable{private static final long serialVersionUID = 1L;private String name;private int age;private String address;public String getName() {return name;}public void setName(String name) { = name;}public int getAge() {return age;}public void setAge(int age) { = age;}public String getAddress() {return address;}public void setAddress(String address) { = address;}}package ;import ;import ;import ;import ;import ;import ;import ;import ;public class JSONSerializer {private static final String DEFAULT_CHARSET_NAME = UTF-8;public static String serialize(T object) {return (object);}public static T deserialize(String string, Class clz) {return (string, clz);}public static T load(Path path, Class clz) throws IOException {return deserialize(new String((path), DEFAULT_CHARSET_NAME), clz);}public static void save(Path path, T object) throws IOException {if ((())) {(());}(path,serialize(object)(DEFAULT_CHARSET_NAME),,,_EXISTING);}public static void main(String[] args) {Person person1 = new Person();(address);(11);(amao);Person person2 = new Person();(address);(11);(amao);List lp = new ArrayList();(person1);(person2);(serialize(lp));}}输出：[{address:address,age:11,name:amao},{address:address,age:11,name:amao}]