Struts中的文件下载

Posted 2022-09-28 xiaowenwen

Struts下载中struts.xml配置信息

<action name="download" class="com.lzw.web.action.DownloadAction" method="download">
            <!-- 以流的形式把文件反应给客服端 -->
            <result type="stream">
                  <!-- 输入流名称 -->
                  <param name="inputName">input</param>
                  <param name="contentDisposition">attachment;filename=$fileName</param>
                 <param name="contentType">application/octet-stream</param>
           </result>
</action>

动作类

package com.lzw.web.action;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import com.opensymphony.xwork2.ActionSupport;
/**
* 在Action中写一个输入流属性
* 提供get方法
* 写一个download方法，给input赋值
* 写struts.xml文件添加action
* @author HP
*
*/
public class DownloadAction extends ActionSupport

private InputStream input;
private String fileName;

public String getFileName()
return fileName;

public InputStream getInput()
return input;

public String download() throws FileNotFoundException, UnsupportedEncodingException
fileName = "a.jpg";
String path = "D:\\" + fileName;
input = new FileInputStream(path);

//中文显示
// fileName = "照片.jpg";
// fileName = URLEncoder.encode(fileName, "UTF-8");
return SUCCESS;