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JSP開(kāi)發(fā)之Struts2實(shí)現(xiàn)下載功能的實(shí)例

1、Action 類

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:\\芒果豆.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" >無(wú)注解下載/a>

以上就是JSP實(shí)現(xiàn)下載功能的實(shí)例代碼，如有疑問(wèn)請(qǐng)留言或者到本站社區(qū)交流討論，感謝閱讀，希望能幫助到大家，謝謝大家對(duì)本站的支持！

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