1）Struts2单文件上传
action：类文件
package com.mlq.action;import com.opensymphony.xwork2.ActionSupport;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import java.io.File;import java.io.IOException;/** * Struts2：单文件上传 * * @author asus */public class UploadFileAction extends ActionSupport { ???//临时文件 ???private File upload; ???//文件类型(底层规定属性名称) ???private String uoloadContextType; ???//文件名称(底层规定属性名称) ???private String uploadFileName; ???//文件存放路径 ???private String savePath; ???@Override ???public void validate() { ???????System.out.println("严重方法"); ???} ???//默认访问方法 ???@Override ???public String execute() throws IOException { ???????//文件全路径 ???????File destFile = new ???????????????File(ServletActionContext.getRequest().getRealPath(savePath) + "\\" + getUploadFileName()); ???????String path = destFile.getPath(); ???????System.out.println(path + "------"); ???????FileUtils.copyFile(upload, destFile); ???????return "success"; ???} ???public String getSavePath() { ???????return savePath; ???} ???public void setSavePath(String savePath) { ???????this.savePath = savePath; ???} ???public File getUpload() { ???????return upload; ???} ???public void setUpload(File upload) { ???????this.upload = upload; ???} ???public String getUoloadContextType() { ???????return uoloadContextType; ???} ???public void setUoloadContextType(String uoloadContextType) { ???????this.uoloadContextType = uoloadContextType; ???} ???public String getUploadFileName() { ???????return uploadFileName; ???} ???public void setUploadFileName(String uploadFileName) { ???????this.uploadFileName = uploadFileName; ???}}struts.xml：核心配置文件
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC ?"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" ???????"http://struts.apache.org/dtds/struts-2.0.dtd"><struts> ???<package name="user" namespace="/user" extends="struts-default"> ???????<!--全局配置信息--> ???????<global-results> ???????????<result name="input">/upload.jsp</result> ???????</global-results> ???????<!--文件上传--> ???????<action name="upload" class="com.mlq.action.UploadFileAction"> ???????????<!--内置设定action类中的属性值--> ???????????<param name="savePath">/upload</param> ???????????<result>/upload.jsp</result> ???????????<!--设定文件参数--> ???????????<interceptor-ref name="fileUpload"> ???????????????<param name="maximumSize">512000</param> ???????????????<param name="allowedType">image/jpg</param> ???????????</interceptor-ref> ???????????<!--默认的拦截器--> ???????????<interceptor-ref name="defaultStack"></interceptor-ref> ???????</action> ???</package></struts>
upload.jsp：JSP页面
<%@ taglib prefix="s" uri="/struts-tags" %><%-- ?Created by IntelliJ IDEA. ?User: asus ?Date: 2018/10/4 ?Time: 10:32 ?To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><html><head> ???<title>StrutsTow文件上传</title></head><body><div> ???<fieldset> ???????<legend>Struts2文件上传</legend> ???????<form action="/user/upload" enctype="multipart/form-data" method="post"> ???????????选择文件：<input type="file" name="upload"> ???????????<input type="submit" value="提交"> ???????</form> ???</fieldset> ???<br/><br/> ???<fieldset> ???????<legend>上传的图片回显</legend> ???????<img width="200px" height="300px" src="/upload/<s:property value=‘uploadFileName‘/>"/> ???</fieldset> ???<br/><br/> ???<fieldset> ???????<legend>错误信息</legend> ???????<s:fielderror></s:fielderror> ???</fieldset></div></body></html>
Web.xml：核心配置
???<!--核心控制器--> ???<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>/*</url-pattern> ???</filter-mapping> ???<welcome-file-list> ???????<welcome-file>upload.jsp</welcome-file> ???</welcome-file-list>
2）Struts2多文件上传
action：类文件
package com.mlq.action;import com.opensymphony.xwork2.ActionSupport;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import java.io.File;import java.io.IOException;/** * Struts2：单文件上传 * * @author asus */public class UploadsFileAction extends ActionSupport { ???//临时文件 ???private File[] upload; ???//文件类型 ???private String[] uoloadContextType; ???//文件名称 ???private String[] uploadFileName; ???//文件存放路径 ???private String savePath; ???@Override ???public void validate() { ???????System.out.println("严重方法"); ???} ???//默认访问方法 ???@Override ???public String execute() throws IOException { ???????for (int i = 0; i < upload.length; i++) { ???????????File temp=upload[i]; ???????????//文件全路径 ???????????File destFile = new ???????????????????File(ServletActionContext.getRequest().getRealPath(savePath) + "\\" + uploadFileName[i]); ???????????String path = destFile.getPath(); ???????????System.out.println(path + "------"); ???????????FileUtils.copyFile(temp, destFile); ???????} ???????return "success"; ???} ???public File[] getUpload() { ???????return upload; ???} ???public void setUpload(File[] upload) { ???????this.upload = upload; ???} ???public String[] getUoloadContextType() { ???????return uoloadContextType; ???} ???public void setUoloadContextType(String[] uoloadContextType) { ???????this.uoloadContextType = uoloadContextType; ???} ???public String[] getUploadFileName() { ???????return uploadFileName; ???} ???public void setUploadFileName(String[] uploadFileName) { ???????this.uploadFileName = uploadFileName; ???} ???public String getSavePath() { ???????return savePath; ???} ???public void setSavePath(String savePath) { ???????this.savePath = savePath; ???}}struts.xml：核心配置文件
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC ?"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" ???????"http://struts.apache.org/dtds/struts-2.0.dtd"><struts> ???<!--全局总文件大小设置--> ???<constant name="struts.multipart.maxSize" value="5097152"/> ???<package name="user" namespace="/user" extends="struts-default"> ???????<!--全局配置信息--> ???????<global-results> ???????????<result name="input">/upload.jsp</result> ???????</global-results> ???????<!--文件上传--> ???????<action name="upload" class="com.mlq.action.UploadsFileAction"> ???????????<!--内置设定action类中的属性值--> ???????????<param name="savePath">/upload</param> ???????????<result>/upload.jsp</result> ???????????<!--设定文件参数--> ???????????<interceptor-ref name="fileUpload"> ???????????????<param name="maximumSize">512000</param> ???????????????<param name="allowedType">image/jpg</param> ???????????</interceptor-ref> ???????????<!--默认的拦截器--> ???????????<interceptor-ref name="defaultStack"></interceptor-ref> ???????</action> ???</package></struts>
upload.jsp：JSP页面
<%@ taglib prefix="s" uri="/struts-tags" %><%-- ?Created by IntelliJ IDEA. ?User: asus ?Date: 2018/10/4 ?Time: 10:32 ?To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><html><head> ???<title>StrutsTow文件上传</title></head><body><div> ???<fieldset> ???????<legend>Struts2文件上传</legend> ???????<form action="/user/upload" enctype="multipart/form-data" method="post"> ???????????选择文件：<input type="file" name="upload"> ???????????<br/> ???????????选择文件：<input type="file" name="upload"> ???????????<br/> ???????????选择文件：<input type="file" name="upload"> ???????????<input type="submit" value="提交"> ???????</form> ???</fieldset> ???<br/><br/> ???<fieldset> ???????<legend>上传的图片回显</legend> ???????<s:iterator value="uploadFileName"> ???????????<img width="200px" height="300px" src="/upload/<s:property/>"/> ???????</s:iterator> ???</fieldset> ???<br/><br/> ???<fieldset> ???????<legend>错误信息</legend> ???????<s:fielderror></s:fielderror> ???</fieldset></div></body></html>
web.xml：核心配置
<!--核心控制器--> ?<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>/*</url-pattern> ?</filter-mapping> ?<welcome-file-list> ???<welcome-file>upload.jsp</welcome-file> ?</welcome-file-list>
3）Struts2文件下载
action：类文件
package com.mlq.action;import com.opensymphony.xwork2.ActionSupport;import org.apache.struts2.ServletActionContext;import java.io.BufferedInputStream;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;/** * Struts2：文件下载 * * @author asus */public class FileDownAction extends ActionSupport { ???/*** ????* 读取下载文件的目录 ????*/ ???private String inputPath; ???/*** ????* 下载文件的文件名 ????*/ ???private String fileName; ???/*** ????* 读取下载文件的输入流 ????*/ ???private InputStream inputStream; ???public String getInputPath() { ???????return inputPath; ???} ???public void setInputPath(String inputPath) { ???????this.inputPath = inputPath; ???} ???public String getFileName() { ???????return fileName; ???} ???public void setFileName(String fileName) { ???????this.fileName = fileName; ???} ???public InputStream getInputStream() throws FileNotFoundException { ???????String realPath = ???????????????ServletActionContext.getServletContext().getRealPath(inputPath); ???????System.out.println(realPath+"\\"+fileName); ???????return new BufferedInputStream(new FileInputStream(realPath+"\\"+fileName)); ???} ???public void setInputStream(InputStream inputStream) { ???????this.inputStream = inputStream; ???}}struts.xml：核心配置文件
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC ?"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" ???????"http://struts.apache.org/dtds/struts-2.0.dtd"><struts> ???<package name="user" namespace="/user" extends="struts-default"> ???????<!--文件上传--> ???????<action name="downLoad" class="com.mlq.action.FileDownAction"> ???????????<!--指定文件下载目录地址--> ???????????<param name="inputPath">/upload</param> ???????????<!--设置下载类型--> ???????????<result name="success" type="stream"> ???????????????<!--设置发送到浏览器的MIMe类型--> ???????????????<param name="contentType">application/octet-stream</param> ???????????????<!--设置输入流的名称--> ???????????????<param name="inputStream">inputStream</param> ???????????????<!--提示用户打开还是下载--> ???????????????<param name="contentDisposition">attachment;filename="${fileName}"</param> ???????????????<!--缓冲区的大小：没有严格要求可随意设置--> ???????????????<param name="bufferSize">4096</param> ???????????</result> ???????</action> ???</package></struts>index.jsp
<%@ taglib prefix="s" uri="/struts-tags" %><%-- ?Created by IntelliJ IDEA. ?User: asus ?Date: 2018/10/4 ?Time: 10:32 ?To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><html><head> ???<title>StrutsTow文件下载</title></head><body><div> ???<fieldset> ???????<legend>Struts2文件下载</legend> ???????<a href="/user/downLoad?fileName=t01a4036c8714c169fd.jpg">文件下载</a> ???</fieldset></div></body></html>
web.xml核心配置
<!--核心控制器--> ?<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>/*</url-pattern> ?</filter-mapping>
分享知识-快乐自己：Struts2文件上传及文件下载
原文地址：https://www.cnblogs.com/mlq2017/p/9790232.html