FileInputStream和FileNotFound异常 [英] FileInputStream and FileNotFound Exception

问题描述

我正在尝试使用以下java代码检索相对路径中的jrxml文件：

I am trying to retrieve a jrxml file in a relative path using the following java code:

 String jasperFileName = "/web/WEB-INF/reports/MemberOrderListReport.jrxml";
 File report = new File(jasperFileName);
 FileInputStream fis = new FileInputStream(report);

但是，很可能我没有成功定义相对路径并获得java.io. FileNotFoundException：执行期间出错。

However, most probably I didn't succeed in defining the relative path and get an java.io.FileNotFoundException: error during the execution.

由于我在Java I / O操作方面不是很有经验，所以我没有解决我的问题。欢迎任何帮助或想法。

Since I am not so experienced in Java I/O operations, I didn't solve my problem. Any helps or ideas are welcomed.

推荐答案

您正在尝试处理 jrxml 文件作为文件系统上的对象，但这不适用于Web应用程序。

You're trying to treat the jrxml file as an object on the file-system, but that's not applicable inside a web application.

您不知道应用程序的部署方式和位置，所以你不能在它上面指一个文件。

You don't know how or where your application will be deployed, so you can't point a File at it.

而你想要使用 getResourceAsStream 来自 ServletContext 。类似于：

Instead you want to use getResourceAsStream from the ServletContext. Something like:

String resourceName = "/WEB-INF/reports/MemberOrderListReport.jrxml"
InputStream is = getServletContext().getResourceAsStream(resourceName);

就是你所追求的。

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