question

I am uploading images to jboss server by getting the absolute path using the following code

getServletContext().getRealPath("");

The uploaded image is moved to the absolute path and I can access the image usinghttp://test.com:8080/image.jpg

My problem is the image is being uploaded to the tmp directory of jboss server, so i am losing the uploaded images in the next deployment. I tried uploading the image to various paths to make it work \jboss-5.0.1.GA\server\default\deploy and here \jboss-5.0.1.GA\server\default\work\jboss.web\localhost as well But fails, I cannot access the image using http://test.com:8080/image.jpg

Answer

You can add a new context to specify a path to access an external folder.

Steps for Jboss 4 and older versions:

1. Open your file /YOURINSTANCE_JBOSS/deploy/jboss-web.deployer/server.xml.

2. Define a new Context in the tag <Host name=”localhost” ...>

   Example:

   <Host name=”localhost” ...><Context path=”/myfolder” docBase=”/home/username/my_images” reloadable=”true”></Context>

   Where /myfolder will be the path that you are going to use to access your files, and/home/username/my_images the folder where you are going to upload your pictures.

3. Restart JBoss

Now you will be able to access your files with the next path:

http://yourserver:yourport/myfolder/filename

Steps for Jboss 5:

1. Create a new file named context.xml into your WEB-INF folder with the next content:

   <?xml version="1.0" encoding="UTF-8"?><Context allowLinking="true" cookies="true" crossContext="true" override="true">    <Resources allowLinking="true" className="YOUR_PACKAGE.MyResources" homeDir="/home/username/my_images" /></Context>

   Where className is the java class that will access the resources and homeDir your external directory.

2. According to this link create a new class to access your resources defined in the file context.xml

   Example:

   public class MyResources extends FileDirContext {}

Now you will be able to access your files with the next function:

request.getServletContext().getResourceAsStream(uri);

Steps for Jboss 5 and older versions:

1. Create a new file named context.xml into your WEB-INF folder with the next content:

   <?xml version="1.0" encoding="UTF-8"?><Context allowLinking="true" cookies="true" crossContext="true" override="true">      <Resources allowLinking="true" homeDir="/home/username/my_images" />  </Context>

   Where homeDir is your external directory.

2. Create a symbolic link: YourDeployedProject.war/myfolder linked to /home/username/my_images

   Windows:

   mklink /D C:\YOUR_JBOSS_SERVER\server\default\deploy\YourDeployedProject.war\myfolder C:\users\YOURUSER\my_images

   Linux:

   YourDeployedProject.war# ln -s /home/username/my_images myfolder

Now you will be able to access your files with the next path:

http://localhost:8080/DeployedProject/myfolder/filename

Steps for Jboss 7:

JBoss 7 doesn‘t allow any of the methods for the previous JBoss versions, so the easiest solution is to implement a Servlet to access your files like in the next link.

来源：http://stackoverflow.com/questions/17359038/jboss-image-upload-and-http-access-to-show-image

 /*** Servlet to serve files from a static directory*/public class FileServingServlet extends DefaultServlet{     public void init() throws ServletException {         super.init();              final Hashtable<String, Object> env = new Hashtable<String, Object>();        env.put(ProxyDirContext.HOST, resources.getHostName());        env.put(ProxyDirContext.CONTEXT, resources.getContextName());              final String docBaseProperty = getServletConfig().getInitParameter("docBaseProperty");        if (docBaseProperty == null || docBaseProperty.trim().equals("")) {                 throw new RuntimeException("docBaseProperty parameter must not be blank");       }             final String docBase = System.getProperty(docBaseProperty);       if (docBase == null || docBase.trim().equals("")) {                 throw new RuntimeException("docBase property " + docBaseProperty + " must be set");       }             final FileDirContext context = new FileDirContext(env);       context.setDocBase(docBase);             // Load the proxy dir context.       resources = new ProxyDirContext(env, context);         if (super.debug > 0) {          log("FileServingServlet:  docBase=" + docBase);      }         }   }   Which I use like this in the web.xml    <servlet>        <servlet-name>fileServing</servlet-name>        <servlet-class>xxxx.FileServingServlet</servlet-class>        <init-param>            <param-name>debug</param-name>            <param-value>0</param-value>        </init-param>        <init-param>            <param-name>listings</param-name>            <param-value>false</param-value>        </init-param>        <init-param>            <param-name>docBaseProperty</param-name>            <!-- Name of the system property containg the base dir -->            <param-value>my.basedir.directory</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>      <servlet-mapping>        <servlet-name>fileServing</servlet-name>        <url-pattern>/directory/*</url-pattern>    </servlet-mapping>  It maps to /directory the content of the local directory specified in the System property my.basedir.directory. I use such a property because I did not want to hard code the local directory in the web.xml as it can be different in various deployement context.

来源：https://community.jboss.org/thread/169647#639271