代码如下

package com.ming;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import org.apache.commons.fileupload.FileUpload;import org.apache.commons.io.FileUtils;import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import org.apache.struts2.ServletActionContext;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.Date;import java.util.Map;public class uploadFile extends ActionSupport { ???private File myFile; ???private String myFileContentType; ???private String myFileFileName; ???private String destPath; ???@Override ???public String execute() ???{ ???????Logger logger = LogManager.getLogger(); ???????// 获取到Action执行的上下文 ???????destPath = ServletActionContext.getServletContext().getRealPath("/"); ???????// 拼接目录 ???????destPath = destPath + "upload/"; ???????// 新建文件 ???????File tmpFile = new File(destPath, new Date().toString() + this.myFileFileName); ???????try{ ???????????FileUtils.copyFile(myFile, tmpFile); ???????}catch (Exception e){ ???????????logger.info(e); ???????} ???????logger.info(myFileContentType); ???????return SUCCESS; ???} ???public File getMyFile() { ???????return myFile; ???} ???public void setMyFile(File myFile) { ???????this.myFile = myFile; ???} ???public String getMyFileContentType() { ???????return myFileContentType; ???} ???public void setMyFileContentType(String myFileContentType) { ???????this.myFileContentType = myFileContentType; ???} ???public String getMyFileFileName() { ???????return myFileFileName; ???} ???public void setMyFileFileName(String myFileFileName) { ???????this.myFileFileName = myFileFileName; ???}}

核心思路 是 获取到当前action上下文件,接着获取容器上下文,在进行绝对路径拼接,拼接完成以后,新建file文件,然后,文件内容写入即可.

配置文件

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC ???????"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" ???????"http://struts.apache.org/dtds/struts-2.5.dtd"><struts> ???<!-- 定义调试 --> ???<constant name="struts.devMode" value="true" /> ???<constant name="struts.multipart.maxSize" value="1000000" /> ???<package name="helloworld" extends="struts-default"> ???????<action name="upload" class="com.ming.uploadFile"> ???????????<interceptor-ref name="defaultStack"/> ???????????<interceptor-ref name="fileUpload"> ???????????????<param name="allowedTypes">image/jpeg,image/gif</param> ???????????</interceptor-ref> ???????????<result name="success">/success.jsp</result> ???????????<result name="error">/error.jsp</result> ???????</action> ???</package></struts>

文件上传

原文地址：https://www.cnblogs.com/melovemingming/p/10597466.html