我如何检查“System.setProperty”完成的代理设置？在Java中？

Question

我正在开发一个Java应用程序，该应用程序将用于在专用环境上启动一些测试自动化脚本。 必要时也需要设置代理。 我开发了一个类，该类将用于配置代理设置，一旦从外部读取属性包含flag'enable_proxy'equals'true'。

以下是我的摘要代码：

    package proxy;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Properties;

import org.apache.commons.lang3.exception.ExceptionUtils;

public class ProxyConfiguration {

    private static String proxyHost;
    private static String proxyPort; //80 if it isn't provided
    private static String nonProxyHosts;
    private static String protocolType;
    public static boolean flagProxy;

    //Set method used to read the flag Proxy
    public static boolean isProxyEnabled(Properties myPropertiesFile) {
        flagProxy = Boolean.parseBoolean(myPropertiesFile.getProperty("ENABLE_PROXY").toLowerCase());
        return flagProxy;
    }

    public static String getProxyHost() {
        return proxyHost;
    }

    //Set method used to read the Proxy host from properties
    public static void setProxyHost(Properties myPropertiesFile) {
        ProxyConfiguration.proxyHost = myPropertiesFile.getProperty("PROXY_HOST");
    }

    public static String getProxyPort() {
        return proxyPort;
    }

    //Set method used to read the Proxy port from properties
    public static void setProxyPort(Properties myPropertiesFile) {
        ProxyConfiguration.proxyPort = myPropertiesFile.getProperty("PROXY_PORT");
    }

    public static String getNonProxyHosts() {
        return nonProxyHosts.replace(",", "|");
    }

    //Set method used to read the exception from properties
    public static void setNonProxyHosts(Properties myPropertiesFile) {
        ProxyConfiguration.nonProxyHosts = myPropertiesFile.getProperty("PROXY_EXCEPTION");
    }
    
    public static String getProtocolType() {
        return protocolType;
    }

    //Set method used to read the exception from properties
    public static void setProtocolType(Properties myPropertiesFile) {
        ProxyConfiguration.protocolType = myPropertiesFile.getProperty("PROTOCOL_TYPE");
    }
    
    //Method used to set the Proxy settings on system
    public static void setProxyConfiguration(Properties myPropertiesFile) {

        try {
            ProxyConfiguration.setProtocolType(myPropertiesFile);
            ProxyConfiguration.setProxyHost(myPropertiesFile);
            ProxyConfiguration.setProxyPort(myPropertiesFile);
            ProxyConfiguration.setNonProxyHosts(myPropertiesFile);
            
            System.setProperty("java.net.useSystemProxies", "true");
            System.setProperty(ProxyConfiguration.getProtocolType() +".proxyHost", ProxyConfiguration.getProxyHost());
            System.setProperty(ProxyConfiguration.getProtocolType() +".proxyPort", ProxyConfiguration.getProxyPort());

            boolean exceptions = ProxyConfiguration.getNonProxyHosts().isEmpty();
            if(!exceptions) {
                System.setProperty(ProxyConfiguration.getProtocolType() +".nonProxyHosts", ProxyConfiguration.getNonProxyHosts());
            }
            try {
                URL url = new URL("http://java.sun.com/");
                InputStream in = url.openStream();
                //return true;
            } catch (Exception e) {
                //return false;
            }
        } catch (Exception e) {
            System.err.println("Si è verificato un errore nella setProxyConfiguration: ");
            String exc = ExceptionUtils.getStackTrace(e);
            System.err.println(exc);
            System.exit(-1);
        }
    }
}

如何检查代理设置是否正确设置？

我还尝试使用本地计算机的命令提示符并启动follwing命令：

• netsh winhttp show show proxy，

但我收到：

Current WinHTTP proxy settings:

Direct access (no proxy server).

读取的属性为：

• protocol_type = http
• proxy_host = webcache.mydomain.com（这是一个示例 java网络）
• proxy_port = 8080
• proxy_exception =

感谢您的支持！