Struts2 实现多文件上传

来源：互联网发布：王者荣耀显示网络异常编辑：程序博客网时间：2024/06/06 05:24

前台form 表单：设置method=post,enctype=multipart/form-data。

struts2在原有的上传解析器继承上做了进一步封装，更进一步简化了文件上传。

Action需要使用3个属性来封装该文件域的信息：

（1）类型为File的*属性封装了该文件域对应的文件内容；
（2）类型为String的***FileName属性封装了该文件域对应的文件的文件类型；
（3）类型为String的***ContentType属性封装了该文件域对应的文件的类型。

具体实现：

新建web项目
添加struts2相关包
myeclipse可直接下载，右击项目，如下。

前台

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><html>  <body>    <form action="upload.action" method="post" enctype="multipart/form-data">        <input type="file" name="upload" multiple="multiple"/>        <input type="submit" value="提交"/>    </form>  </body></html>

配置web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">  <display-name>UploadFile</display-name>  <filter>    <filter-name>struts2</filter-name>    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  </filter>  <filter-mapping>    <filter-name>struts2</filter-name>    <url-pattern>*.action</url-pattern>  </filter-mapping></web-app>

配置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>    <constant name="struts.enable.DynamicMethodInvocation" value="false"/>    <constant name="struts.devMode" value="true"/>    <constant name="struts.multipart.saveDir" value="/tmp"/>    <constant name="struts.custom.i18n.resources" value="app"></constant>    <package name="default" namespace="/" extends="struts-default">        <action name="upload" class="com.yf.action.UploadAction">        <result>/index.jsp</result>        <interceptor-ref name="defaultStack"></interceptor-ref>        </action>    </package></struts>

后台代码

public class UploadAction extends ActionSupport{    private List<File> upload;    private List<String> uploadContentType;    private List<String> uploadFileName;    public List<File> getUpload() {        return upload;    }    public void setUpload(List<File> upload) {        this.upload = upload;    }    public List<String> getUploadContentType() {        return uploadContentType;    }    public void setUploadContentType(List<String> uploadContentType) {        this.uploadContentType = uploadContentType;    }    public List<String> getUploadFileName() {        return uploadFileName;    }    public void setUploadFileName(List<String> uploadFileName) {        this.uploadFileName = uploadFileName;    }    @Override    public String execute() throws Exception {        //文件保存路径        String path = ServletActionContext.getServletContext().getRealPath("/images");        File file = new File(path);        //不存在则创建        if(!file.exists()){            file.mkdir();        }        //循环将文件上传到指定路径        for(int i = 0; i< upload.size(); i++){            FileUtils.copyFile(upload.get(i), new File(file,uploadFileName.get(i)));        }        return SUCCESS;    }

结果如下
这里写图片描述

这里写图片描述

阅读全文

2 0