struts2学习(14)struts2文件上传和下载（4）多个文件上传和下载

四、多个文件上传：

五、struts2文件下载：

多个文件上传action

com.cy.action.FilesUploadAction.java:

package com.cy.action;

import java.io.File;

import org.apache.commons.io.FileUtils;

import com.opensymphony.xwork2.ActionSupport;

public class FilesUploadAction extends ActionSupport{

    private static final long serialVersionUID = 1L;

    private File[] struts;                    //文件，对应fileupload.jsp中input type=file的name

    private String[] strutsFileName;        //文件名

    private String[] strutsContentType;        //文件类型

    public File[] getStruts() {

        return struts;

    }

    public void setStruts(File[] struts) {

        this.struts = struts;

    }

    public String[] getStrutsFileName() {

        return strutsFileName;

    }

    public void setStrutsFileName(String[] strutsFileName) {

        this.strutsFileName = strutsFileName;

    }

    public String[] getStrutsContentType() {

        return strutsContentType;

    }

    public void setStrutsContentType(String[] strutsContentType) {

        this.strutsContentType = strutsContentType;

    }

    @Override

    public String execute() throws Exception {

        for(int i=0; i<struts.length; i++){

            System.out.println("文件名：" + strutsFileName[i]);

            System.out.println("文件类型：" + strutsContentType[i]);

            String filePath = "E:/" + strutsFileName[i];

            File savefile = new File(filePath);

            FileUtils.copyFile(struts[i], savefile);

        }

        return SUCCESS;

    }

}

文件下载action

FileDownloadAction.java:

package com.cy.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import com.opensymphony.xwork2.ActionSupport;

public class FileDownloadAction extends ActionSupport{

    private static final long serialVersionUID = 1L;

    private String fileName;        //下载的文件名

    public String getFileName() throws Exception {

        fileName=new String(fileName.getBytes(),"ISO8859-1");    //对文件中文名进行重编码

        return fileName;

    }

    public void setFileName(String fileName){

        this.fileName = fileName;

    }

    /**

     * 返回的是文件流

     * @return

     * @throws Exception

     */

    public InputStream getInputStream() throws Exception{

        File file = new File("E:/1.jpg");    //将E盘下的1.png下载下来

        this.fileName = "美女哇哇.png";        //重新定义文件名

        return new FileInputStream(file);    //返回inputStream

    }

}

struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <!-- 配置允许上传文件最大为20000000Byte,约20Mb -->

    <constant name="struts.multipart.maxSize" value="20000000"></constant>

    <package name="manage" extends="struts-default">

        <action name="upload" class="com.cy.action.FileUploadAction">

            <result name="input">fileupload.jsp</result>

            <result name="success">success.jsp</result>

            <!-- 配置允许上传的文件类型

                  配置允许上传的文件大小，最大81101byte，= 79.2KB

             -->

            <interceptor-ref name="fileUpload">

                <param name="allowedTypes">image/bmp,image/x-png,image/gif,image/jpg,image/jpeg</param>

                <param name="maximumSize">81101</param>

            </interceptor-ref>

            <interceptor-ref name="defaultStack"></interceptor-ref>

        </action>

        <action name="uploads" class="com.cy.action.FilesUploadAction">

            <result name="input">filesupload.jsp</result>

            <result name="success">success.jsp</result>

        </action>

        <action name="download" class="com.cy.action.FileDownloadAction">

            <result type="stream">

                <param name="contentDisposition">attachment;filename=${fileName}</param>

            </result>

        </action>

    </package>

</struts>

多个文件上传filesupload.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <form action="uploads" method="post" enctype="multipart/form-data">

        选择文件1：<input type="file" name="struts" /><br/>

        选择文件2：<input type="file" name="struts" /><br/>

        选择文件3：<input type="file" name="struts" /><br/>

        <input type="submit" value="提交" />

    </form>

</body>

</html>

文件上传成功success.jsp:

<body>

文件上传成功！

</body>

文件下载filedownload.jsp:

<body>

    <a href="download">文件下载</a>

</body>

测试结果：

1.多个文件上传：

选择文件上传，成功后console打印：

2.文件下载，将E盘下的1.jpg下载下来：

巴特西

struts2学习(14)struts2文件上传和下载（4）多个文件上传和下载

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