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Struts2实现多文件上传功能

作者：Giving_bestself　　发布时间：2021-11-01 13:50:25　

标签：Struts2,上传

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

来源：http://blog.csdn.net/giving_bestself/article/details/77513177

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Struts2实现多文件上传功能

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