- 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>