package com.ljq.action;import java.io.File;import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial") public class UploadAction extends ActionSupport{private File image; //上传的文件 private String imageFileName; //文件名称 private String imageContentType; //文件类型 public String execute() throws Exception {String realpath = ServletActionContext.getServletContext().getRealPath("/images");//D:\apache-tomcat-6.0.18\webapps\struts2_upload\images System.out.println("realpath: "+realpath);if (image != null) {File savefile = new File(new File(realpath), imageFileName);if (!savefile.getParentFile().exists())savefile.getParentFile().mkdirs();FileUtils.copyFile(image, savefile);ActionContext.getContext().put("message", "文件上传成功");}return "success";}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 getImageContentType() {return imageContentType;}public void setImageContentType(String imageContentType) {this.imageContentType = imageContentType;}}

package com.ljq.action;import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial") public class UploadAction2 extends ActionSupport {// 封装上传文件域的属性 private File image;// 封装上传文件类型的属性 private String imageContentType;// 封装上传文件名的属性 private String imageFileName;// 接受依赖注入的属性 private String savePath;@Overridepublic String execute() {FileOutputStream fos = null;FileInputStream fis = null;try {// 建立文件输出流 System.out.println(getSavePath());fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName());// 建立文件上传流 fis = new FileInputStream(getImage());byte[] buffer = new byte[1024];int len = 0;while ((len = fis.read(buffer)) > 0) {fos.write(buffer, 0, len);}} catch (Exception e) {System.out.println("文件上传失败");e.printStackTrace();} finally {close(fos, fis);}return SUCCESS;}/*** 返回上传文件的保存位置* * @return*/public String getSavePath() throws Exception{return ServletActionContext.getServletContext().getRealPath(savePath); }public void setSavePath(String savePath) {this.savePath = savePath;}public File getImage() {return image;}public void setImage(File image) {this.image = image;}public String getImageContentType() {return imageContentType;}public void setImageContentType(String imageContentType) {this.imageContentType = imageContentType;}public String getImageFileName() {return imageFileName;}public void setImageFileName(String imageFileName) {this.imageFileName = imageFileName;}private void close(FileOutputStream fos, FileInputStream fis) {if (fis != null) {try {fis.close();} catch (IOException e) {System.out.println("FileInputStream关闭失败");e.printStackTrace();}}if (fos != null) {try {fos.close();} catch (IOException e) {System.out.println("FileOutputStream关闭失败");e.printStackTrace();}}}}

<?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><!-- 该属性指定需要Struts2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 --><constant name="struts.action.extension" value="do" /><!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 --><constant name="struts.serve.static.browserCache" value="false" /><!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 --><constant name="struts.configuration.xml.reload" value="true" /><!-- 开发模式下使用,这样可以打印出更详细的错误信息 --><constant name="struts.devMode" value="true" /><!-- 默认的视图主题 --><constant name="struts.ui.theme" value="simple" /><!--<constant name="struts.objectFactory" value="spring" />--><!--解决乱码 --><constant name="struts.i18n.encoding" value="UTF-8" /><!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) --><constant name="struts.multipart.maxSize" value="10701096"/><!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir --><constant name="struts.multipart.saveDir " value="d:/tmp" /><package name="upload" namespace="/upload" extends="struts-default"><action name="*_upload" class="com.ljq.action.UploadAction" method="{1}"><result name="success">/WEB-INF/page/message.jsp</result></action></package><package name="upload2" extends="struts-default"><action name="upload2" class="com.ljq.action.UploadAction2" method="execute"><!-- 动态设置savePath的属性值 --><param name="savePath">/images</param><result name="success">/WEB-INF/page/message.jsp</result><result name="input">/upload/upload.jsp</result><interceptor-ref name="fileUpload"><!-- 文件过滤 --><param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg</param><!-- 文件大小, 以字节为单位 --><param name="maximumSize">1025956</param></interceptor-ref><!-- 默认拦截器必须放在fileUpload之后，否则无效 --><interceptor-ref name="defaultStack" /></action></package> </struts>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib uri="/struts-tags" prefix="s" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><title>文件上传</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"></head><body><!-- ${pageContext.request.contextPath}/upload/execute_upload.do --><!-- ${pageContext.request.contextPath}/upload2/upload2.do --><form action="${pageContext.request.contextPath}/upload2/upload2.do" enctype="multipart/form-data" method="post">文件:<input type="file" name="image"><input type="submit" value="上传" /></form><br/><s:fielderror /></body> </html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="/struts-tags" prefix="s"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><title>上传成功</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> </head><body>上传成功！<br/><br/><!-- ${pageContext.request.contextPath} tomcat部署路径，如：D:\apache-tomcat-6.0.18\webapps\struts2_upload\ --><img src="${pageContext.request.contextPath}/<s:property value="'images/'+imageFileName"/>"><s:debug></s:debug></body> </html>