java 在java中获取url的绝对路径
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Get Absolute path of a url in java
提问by Ria
Is there a way to retrieve the absolute path of url (http://localhost:8080/myApp) in java. The scenario is, i need to connect to csv file located in tomcat server. The statement works well if I enter the absolute path, but is there a solution to retrieve url's path using getAbsolutePath().Sorry if I'm wrong.
有没有办法在java中检索url的绝对路径（http://localhost:8080/myApp）。场景是，我需要连接到位于 tomcat 服务器中的 csv 文件。如果我输入绝对路径，则该语句运行良好，但是否有使用 getAbsolutePath() 检索 url 路径的解决方案。对不起，如果我错了。
Connection conn = DriverManager(getConnection("jdbc:relique:csv:/home/apache-tomcat-6.0.26/webapps/myApp/"))
Thanks in advance.
提前致谢。
回答by Joachim Sauer
You can use ServletContext.getRealPath(), which does exactly what you want.
您可以使用ServletContext.getRealPath()，这正是您想要的。
Note that it does notnecessarily work in all situations. For example, if your Tomcat is configured to deploy the .war file without unpacking it, then this will return null.
注意，它并没有一定适用于所有情况。例如，如果您的 Tomcat 配置为部署 .war 文件而不解压它，那么这将返回 .war 文件null。
回答by Mayank
I don't know much about JAVA.
我对JAVA知之甚少。
May be getServletContext().getContextPath() is something you are looking for
May be getServletContext().getContextPath() is something you are looking for
EDIT:Or may be getRealPath()
编辑：Or may be getRealPath()
回答by Andreas Dolk
Tomcat is not a http server. All tomcat urlsreference services, not files.
Tomcat 不是 http 服务器。所有tomcat url参考服务，而不是文件。
You'll have to implement another service that sends the csv file on request, if you want to get it through any http URL. URL's like http://localhost/myapp/input.csvrequire a http server like apache httpd.
如果您想通过任何 http URL 获取 csv 文件，则必须实施另一项根据请求发送 csv 文件的服务。URL 之类的http://localhost/myapp/input.csv需要像 apache httpd这样的 http 服务器。
(Hope I got your question correct...)
（希望我答对了你的问题...）
