如何在 Struts 2 中将 QRCode 图像从动作类发送和显示到 JSP

I am submitting a JSP form with a string and on submit I am calling a Struts 2 action. In that action I am creating a QRCode image using QRGen library as below

File QRImg=QRCode.from("submitted String").to(ImageType.PNG).withSize(100, 100).file();

我的 JSP 表单:

<form action="createQR">
Enter Your Name<input type="text" name="userName"/><br/>
<input type="submit" value="Create QRCode"/>
</form>

我的动作映射struts.xml:

<action name="createQR" class="CreateQRAction">
 <result name="success">displayQR.jsp</result>
</action>

我的动作类:

import java.io.File;
import net.glxn.qrgen.QRCode;
import net.glxn.qrgen.image.ImageType;  
import com.opensymphony.xwork2.ActionSupport;
public class CreateQRAction extends ActionSupport{
 private File QRImg;
 Private String userName;

 public String execute() {
   QRImg=QRCode.from(userName).to(ImageType.PNG).withSize(100, 100).file();
return SUCCESS;
}

public String getUserName() {
    return userName;
}

public void setUserName(String userName) {
    this.userName = userName;
}
public File getQRImg() {
    return QRImg;
}

public void setQRImg(File QRImg) {
    this.QRImg = QRImg;
}
}

现在如果结果是成功的，我想在我的 JSP 上显示这个图像.

<s:property value="QRImg"/>

@Action(value = "image",  interceptorRefs = @InterceptorRef("basicStack"))
public class ImageAction extends ActionSupport {

public String execute() {

File file = session.get("file");

FileInputStream fis = new FileInputStream(file);
byte[] data = new byte[fis.available()];
fis.read(data);
fis.close();

response.setContentType("image/png");

BufferedImage bi;
OutputStream os = response.getOutputStream();
bi = ImageIO.read(new ByteArrayInputStream(data));
ImageIO.write(bi, "PNG", os);
os.flush();

return NONE;
}