strut2 多个文件上传

在单个文件上传的基础上，修改action中的属性类型，多个文件上传其实就是通过数组或者list来接收文件。客户端上传表单代码如下所示：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'employeeAdd.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
  </head>
  
  <body>
    <form action="${pageContext.request.contextPath}/control/employee/list_execute.action" enctype="multipart/form-data" method="post">
        文件1:<input type="file" name="image"><br/>
        文件2:<input type="file" name="image"><br/>
        文件3:<input type="file" name="image"><br/>
        <input type="submit" value="上传"/>
    </form>
  </body>
</html>

2.在action中的代码如下所示：

package cn.itcast.action;

import java.io.File;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;


public class HelloWorldAction {
    private File[] image;
    private String[] imageFileName;

    public File[] getImage() {
        return image;
    }

    public void setImage(File[] image) {
        this.image = image;
    }

    public String[] getImageFileName() {
        return imageFileName;
    }

    public void setImageFileName(String[] imageFileName) {
        this.imageFileName = imageFileName;
    }

    public String addUI(){
        return "success";
    }

    public String execute() throws Exception{
        
        String realpath = ServletActionContext.getServletContext().getRealPath("/images");  //获取服务端的保存文件的文件夹路径（绝对路径）
        System.out.println(realpath);
        if(image!=null){                                                                    //判断上传的文件是否为空
            File savedir = new File(realpath);                                              //创建文件保存的目录，如果目录不存在则创建
            if(!savedir.exists()) savedir.mkdirs();
            for(int i = 0 ; i<image.length ; i++){                
                File savefile = new File(savedir, imageFileName[i]);                        //循环得到每个文件
                FileUtils.copyFile(image[i], savefile);
            }
            ActionContext.getContext().put("message", "上传成功");
        }
        return "success";
    }
}

5.struts.xml文件的配置和单个文件上传没有多大的区别，如下所示：

<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false"/>
    <constant name="struts.action.extension" value="do,action"/>
    <constant name="struts.multipart.maxSize" value="10701096"/>
    
    <package name="employee" namespace="/control/employee" extends="struts-default">
        <action name="list_*" class="cn.itcast.action.HelloWorldAction" method="{1}">
            <result name="success">/WEB-INF/page/message.jsp</result>
        </action>
    </package>
</struts>