Struts 2 Stream result Action

<action name="text-result" class="actions.TextResult">
    <result type="stream">
        <param name="contentType">text/html</param>
        <param name="inputName">inputStream</param>
    </result>
</action>

package actions;

import java.io.InputStream;
import java.io.StringBufferInputStream;
import com.opensymphony.xwork2.ActionSupport;

public class TextResult extends ActionSupport  {
    private InputStream inputStream;
    public InputStream getInputStream() {
        return inputStream;
    }

    public String execute() throws Exception {
        inputStream = new StringBufferInputStream("Hello World! This is a text string response from a Struts 2 Action.");
        return SUCCESS;
    }
}