如何配置 Java 的代理设置？

发布于 2024-12-05 04:20:24 字数 990 浏览 1 评论 0原文

我正在尝试打开一个 URL 并逐行阅读该网站。我可以在 Eclipse 中很好地完成此操作，因为我猜 Eclipse 会自动为您配置它。当我尝试从命令行运行该程序时，该程序挂起并且从不读取 URL。

经过一番研究，我发现问题与代理设置有关。我遇到的所有文章都说要更改这样的内容：

System.setProperty("java.net.useSystemProxies","true");

或者添加这样的代码行：

System.setProperty("http.proxyHost", "webcache.mydomain.com");
System.setProperty("http.proxyPort", "80");

但我不知道要为我的代理设置添加什么以及这些 System.setProperty 调用的作用。有谁知道如何设置代理设置？我只是想在本地主机上从我的家庭计算机上运行它，而且我什至没有代理或任何东西。

这是我使用的代码，在 Eclipse 中运行良好。

URL link = new URL("http://www.yahoo.com");
            
BufferedReader in = new BufferedReader(new InputStreamReader(link.openStream()));
//InputStream in = link.openStream();
String inputLine = "";
int count = 0;
while ((inputLine = in.readLine()) != null) {
    site = site + "\n" + inputLine;
}
in.close();

原文

I am trying to open a URL and read the website line by line. I can do this fine in Eclipse because I guess Eclipse configures it automatically for you. When I try to run the program from the command line the program hangs and never reads the URL.

After some research the problem has to do with the proxy settings, I figured out. All articles I come across say to change something like this:

System.setProperty("java.net.useSystemProxies","true");

Or to add lines of code like this:

System.setProperty("http.proxyHost", "webcache.mydomain.com");
System.setProperty("http.proxyPort", "80");

But I have no idea what to put for my proxy settings and what any of those System.setProperty calls do. Does anyone know how to set the proxy settings? I am just trying to run this from my home computer on a localhost and I'm not even behind a proxy or anything.

Here is the code I use that works fine in Eclipse.

URL link = new URL("http://www.yahoo.com");
            
BufferedReader in = new BufferedReader(new InputStreamReader(link.openStream()));
//InputStream in = link.openStream();
String inputLine = "";
int count = 0;
while ((inputLine = in.readLine()) != null) {
    site = site + "\n" + inputLine;
}
in.close();

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