Java + Wildfly 9:使用部署应用程序外部的目录进行上载

Question

我正在开发web应用程序，并需要使上传文件的为用户提供可能。upload文件夹位于web应用程序- in openstack数据文件夹之外(在standalone.xml中设置)-示例：

    <host name="default-host" alias="localhost">
                    <location name="/" handler="welcome-content"/>
                    <location name="/folder" handler="folder"/>
                    <filter-ref name="server-header"/>
                    <filter-ref name="x-powered-by-header"/>
                </host>
...

            <handlers>
                <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/>
                <file name="folder" path="/absolute/path/on/server" directory-listing="true"/>
            </handlers>

如果我需要访问这些文件，就没有问题(我只需输入mydomain.com/文件夹/xyz.jpg)，但是我需要引用代码中的文件夹(获取文件夹的路径，然后通过用户上传文件)。我的用于上传的Java接口如下所示：

public class DictateUploadResource {

    public static final String UPLOADED_FILE_PARAMETER_NAME = "file";
    private final String UPLOAD_DIR = servletContext.getRealPath("/folder");


    @POST
    @Consumes("multipart/form-data")
    public Response uploadFile(MultipartFormDataInput input) {

        String path = servletContext.getRealPath("/folder");
        LOGGER.warn(">>>> sit back - starting file upload..." + path);

        Map<String, List<InputPart>> uploadForm = input.getFormDataMap();
        List<InputPart> inputParts = uploadForm.get(UPLOADED_FILE_PARAMETER_NAME);

        for (InputPart inputPart : inputParts) {
            MultivaluedMap<String, String> headers = inputPart.getHeaders();
            String filename = getFileName(headers);


            try {
                InputStream inputStream = inputPart.getBody(InputStream.class, null);

                byte[] bytes = IOUtils.toByteArray(inputStream);

                LOGGER.info(">>> File '{}' has been read, size: #{} bytes", filename, bytes.length);
                writeFile(bytes, path + "/" + filename);
            } catch (IOException e) {
                return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
            }
        }
        return Response.status(Response.Status.OK).build();
    }

    /**
     * Build filename local to the server.
     *
     * @param filename
     * @return
     */
    private String getServerFilename(String path, String filename) {
        return path + "/" + filename;
    }

    private void writeFile(byte[] content, String filename) throws IOException {
        LOGGER.info(">>> writing #{} bytes to: {}", content.length, filename);
        File file = new File(filename);

        if (!file.exists()) {
            file.createNewFile();
        }

        FileOutputStream fop = new FileOutputStream(file);

        fop.write(content);
        fop.flush();
        fop.close();
        LOGGER.info(">>> writing complete: {}", filename);
    }

    /**
     * Extract filename from HTTP heaeders.
     *
     * @param headers
     * @return
     */
    private String getFileName(MultivaluedMap<String, String> headers) {
        String[] contentDisposition = headers.getFirst("Content-Disposition").split(";");

        for (String filename : contentDisposition) {
            if ((filename.trim().startsWith("filename"))) {

                String[] name = filename.split("=");

                String finalFileName = sanitizeFilename(name[1]);
                return finalFileName;
            }
        }
        return "unknown";
    }

    private String sanitizeFilename(String s) {
        return s.trim().replaceAll("\"", "");
    }

}

提前感谢！

Answer 1

最简单的解决方案是在path属性允许表达式的情况下使用系统属性。然后在您的代码中，只需检索属性。

下面是一个CLI示例：

/system-property=static.content.dir:add(value="/absolute/path/on/server")

然后更改主机：

/subsystem=undertow/configuration=handler/file=folder:write-attribute(name=path, value="${static.content.dir}")

如果系统属性不可接受，则始终可以使用管理客户端来读取管理资源以获取名称。不过，系统属性是最简单的。

Answer 2

步骤1：在web应用程序的src文件夹中创建配置文件

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步骤2：这是我的配置文件

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步骤3：现在我选择事件文件并获取与其相关的配置属性，并从属性文件中读取connectionURL

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  InputStream propertiesInputStream = null;
  Properties properties = new Properties();
  propertiesInputStream = EventService.class.getClassLoader().getResourceAsStream("/config.properties");
  properties.load(propertiesInputStream);
  String connUrl = properties.getProperty("connectionUrl");