多文件上传和下载

shangchuang.jsp(上传页面)

  <form action="${pageContext.request.contextPath}/Shang.action" method="post"  enctype="multipart/form-data">
        <input type="file" name="myphoto">
        <input type="file" name="myphoto">
        <input type="submit" value="上传">
    
    </form>

chenggong.jsp(下载页面)

    <c:forEach items="${myphotoFileName }" var="i">
     <img src="/ShangXia/photo/${i}">
    <a href="${pageContext.request.contextPath}/Xia.action?fileName=${i}">下载</a>
    </c:forEach>

CopyOfCopyOfShangAction.java(Action);（上传action）

package com.file;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class CopyOfCopyOfShangAction extends ActionSupport {
    /**
     * 
     */
    private static final long serialVersionUID = 2001688979646522319L;
    private List<File> myphoto;
    private List<String> myphotoFileName;
    private String url;

    public List<File> getMyphoto() {
        return myphoto;
    }

    public void setMyphoto(List<File> myphoto) {
        this.myphoto = myphoto;
    }

    public List<String> getMyphotoFileName() {
        return myphotoFileName;
    }

    public void setMyphotoFileName(List<String> myphotoFileName) {
        this.myphotoFileName = myphotoFileName;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String execute() throws Exception {
        for (int i = 0; i < myphoto.size(); i++) {
            FileOutputStream fos = null;
            FileInputStream fis = null;
            try {
                // 得到当前项目文件夹路径
                url = ServletActionContext.getServletContext().getRealPath(
                        "/photo");
                // 建立文件输出流

                fos = new FileOutputStream(url + "\" + myphotoFileName.get(i));
                // 建立文件上传流
                fis = new FileInputStream(myphoto.get(i));
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len = fis.read(buffer)) > 0) {
                    fos.write(buffer, 0, len);
                }
            } catch (Exception e) {
                System.out.println("文件上传失败");
                e.printStackTrace();
            } finally {
                if (fis != null) {
                    try {
                        fis.close();
                    } catch (Exception e) {
                        System.out.println("FileInputStream关闭失败");
                        e.printStackTrace();
                    }
                }
                if (fos != null) {
                    try {
                        fos.close();
                    } catch (Exception e) {
                        System.out.println("FileOutputStream关闭失败");
                        e.printStackTrace();
                    }
                }

            }
        }
        return SUCCESS;
    }

}

package com.file;

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

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class XiazaiAction extends ActionSupport {
    /**
     * 
     */
    private static final long serialVersionUID = 5981560620962755597L;
    private String fileName;

    public String getFileName() {
        return fileName;
    }
        public void setFileName(String fileName) {
        this.fileName = fileName;
    }
    public InputStream getInputStream() throws FileNotFoundException {
        String path=ServletActionContext.getServletContext().getRealPath("/photo");
        String url=ServletActionContext.getServletContext().getRealPath("/photo")+"\"+fileName;

        System.out.println(path);
        System.out.println(url);
        return new FileInputStream(url);
    }
    public String getXiazaiAction() throws UnsupportedEncodingException{
        System.out.println(fileName);
        fileName=new String(fileName.getBytes("ISO-8859-1"),"UTF-8");
        return fileName;
        

    }
}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
    <!--国际化信息内码-->
    <constant name="struts.i18n.encoding" value="UTF-8"></constant>
    
    <package name="shang" namespace="/" extends="struts-default">
        <action name="Shang" class="com.file.CopyOfCopyOfShangAction">
            <result name="success">/WEB-INFchenggong.jsp</result>
        </action>
        
        <action name="Xia" class="com.file.XiazaiAction">
            <result type="stream">
                <param name="contentDisposition">attachment;filename=${XiazaiAction}</param>
            </result>
            
        </action>
        
        
        </package></struts>