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Save the text string as an InputStream property

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;

Specify a Stream Result type

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