Struts2文件上传并保存

Question

I have successfully uploaded a file in Struts2 with the following code:

String filePath = servletRequest.getSession().getServletContext().getRealPath("/") + "WEB-INF\\files\\";
            fileToCreate = new File(filePath, getUserDocFileName());

            FileUtils.copyFile(this.userDoc, fileToCreate);

The problem is that the file gets copied to the \\build\\web\\WEB-INF\\files folder. Now, when I try to retrieve the file using result type stream:

String filePath = servletRequest.getSession().getServletContext().getRealPath("/") + "WEB-INF\\files\\";
File file = new File(filePath + getFileName());
            try {
                inputStream = new DataInputStream(new FileInputStream(file));
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }



<action name="loadFile" class="com.app.Controller" method="loadFile">
            <result name="success" type="stream">
                <param name="contentType">${fileType}</param>
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">inline;filename="${fileName}"</param>
                <param name="bufferSize">1024</param>
            </result>
            <interceptor-ref name="defaultStack"/>
        </action>

I get the following exception:

java.lang.IllegalArgumentException: Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the <param name="inputName"> tag specified for this action.

Any help regarding this problem?

Is FileUtils.copyFile approach same as setting struts.multipart.saveDir property?

How can I place the file in the WEB-INF folder but not in the build folder?

The files should not get deleted whenever I build my project again. I want to deploy it to OpenShift later on.

Answer 1

尝试从servlet上下文中获取它

InputStream is = ServletActionContext.getServletContext().getResourceAsStream("/WEB-INF/files/" + fileName);