Example of Struts2 downloading function in JSP development, jspstruts2

Example of Struts2 downloading function in JSP development, jspstruts2

Example of Struts2 downloading in JSP development

1. Action class

Package com. favccxx. strutsdemo; import java. io. file; import java. io. fileInputStream; import java. io. inputStream; import com. opensymphony. xwork2.ActionSupport; public class DownloadAction extends ActionSupport {private static final long serialVersionUID =-7758584364932001138L; private InputStream inputStream; @ Override public String execute () throws Exception {inputStream = new FileInputStream (new File ("D :\\ mango bean .jpg"); return SUCCESS;} public InputStream getInputStream () {return inputStream ;} public void setInputStream (InputStream inputStream) {this. inputStream = inputStream ;}}

2. struts. xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC   "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"   "http://struts.apache.org/dtds/struts-2.3.dtd">  <struts>    <constant name="struts.enable.DynamicMethodInvocation" value="false" />   <constant name="struts.devMode" value="true" />    <package name="default" namespace="/" extends="struts-default">      <default-action-ref name="index" />      <global-results>       <result name="error">/error.jsp</result>     </global-results>      <global-exception-mappings>       <exception-mapping exception="java.lang.Exception" result="error"/>     </global-exception-mappings>      <action name="index">       <result type="redirectAction">         <param name="actionName">HelloWorld</param>         <param name="namespace">/example</param>       </result>     </action>          <action name="download" class="com.favccxx.strutsdemo.DownloadAction">       <result name="success" type="stream">         <param name="contentType">application/octet-stream</param>         <param name="inputName">inputStream</param>         <param name="contentDisposition">attachment;filename="mongo.jpg"</param>         <param name="bufferSize">1024</param>       </result>     </action>   </package>  </struts> 

3. web. xml

<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>Struts Blank</display-name>    <filter>     <filter-name>struts2</filter-name>     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>   </filter>    <filter-mapping>     <filter-name>struts2</filter-name>     <url-pattern>/*</url-pattern>   </filter-mapping>    <welcome-file-list>     <welcome-file>index.html</welcome-file>   </welcome-file-list>  </web-app> 

4. JSP

<A href = "/download" rel = "external nofollow"> download without annotations </a>

The above is the sample code for JSP download. If you have any questions, please leave a message or go to the community on this site for discussion. Thank you for reading this article and hope to help you. Thank you for your support for this site!