java - 给定的 URL 有 fileNotFoundException

Question

我有以下代码，它在我的本地开发服务器上运行得很好，但是当我上传到部署服务器时，我总是遇到文件未找到异常

String urlStr = "http://" + getContext().getRequest().getServerName() +
getContext().getServletContext().getContextPath() + "test.action";
URL url = new URL(urlStr);
InputStream input = url.openStream(); //Error always occurs here, it gives me the correct URL but it says file not found.

谁能帮我解决这个问题吗？

Answer 1

因为它是 HTTP URL，所以正确的方法如下。

String urlStr = "http://" + getContext().getRequest().getServerName() +
        getContext().getServletContext().getContextPath() + "test.action";
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if (conn.getResponseCode() == HttpURLConnection.HTTP_ACCEPTED) { 
    InputStream input = conn.getInputStream();
}