基于struts2的文件上传示例

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在webroot文件夹下创建fileupload文件夹

单文件上传：

上传页面：

<%@ page language="java" pageEncoding="utf-8" contentType="text/html; charset=utf-8"%><%@ taglib uri="/struts-tags"   prefix="s"%><html>  <head>    <title>My JSP 'index.jsp' starting page</title>    </head>  <body>    <form action="${pageContext.request.contextPath}/upload/uploadAction_saveFile.action"            name="form1"  method="post"  enctype="multipart/form-data" >                          上传文件名称:<input type="file" name="uploadImage">           <input type="submit" value="上传">    </form>  </body></html>

创建对应的uploadAction类

import java.io.File;import java.io.IOException;import javax.servlet.ServletContext;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial")public class UploadAction extends ActionSupport {/* * 上传文件的存储的临时文件： * apache-tomcat-6.0.35\\work\\Catalina\\localhost\\itcast1105_struts\\upload__5fee1dc7_13ad3d1835b__8000_00000000.tmp */private File uploadImage;//上传文件的类型：text/plainprivate String uploadImageContentType;//上传文件的真是名称private String uploadImageFileName;public File getUploadImage() {return uploadImage;}public void setUploadImage(File uploadImage) {this.uploadImage = uploadImage;}public String getUploadImageContentType() {return uploadImageContentType;}public void setUploadImageContentType(String uploadImageContentType) {this.uploadImageContentType = uploadImageContentType;}public String getUploadImageFileName() {return uploadImageFileName;}public void setUploadImageFileName(String uploadImageFileName) {this.uploadImageFileName = uploadImageFileName;}public String saveFile(){ServletContext sc = ServletActionContext.getServletContext();String path = sc.getRealPath("/fileupload");//创建文件用于接收上传上来的林十年文件File file = new File(path, uploadImageFileName);try {FileUtils.copyFile(uploadImage, file);} catch (IOException e) {e.printStackTrace();}//将临时文件清空uploadImage.delete();return "success";}}

在struts.xml文件中配置文件上传的总大小

<constant name="struts.multipart.maxSize" value="2097152000"></constant>

配置相应的拦截器参数

<action name="uploadAction_saveFile" class="UploadAction" method="saveFile"><result name="success">/upload/success.jsp</result><result name="input">/upload/error.jsp</result><!-- 配置拦截器的参数，这里是文件上传拦截器 --><interceptor-ref name="defaultStack">              <!--               配置文件上传拦截器的参数              * 与定义参数的顺序无关              * 允许的类型(allowedTypes)和允许的扩展名(allowedExtensions)必须保持一致               -->              <!--               * 配置上传文件的大小              * struts.xml文件中配置的是上传文件的总大小              * 这里配置的是上传文件的单个大小               -->              <param name="fileUpload.maximumSize">20971520</param>              <!-- 配置上传文件允许的类型，如果配置多个值的话，用","隔开 -->              <param name="fileUpload.allowedTypes">text/plain,application/msword</param>              <!-- 配置上传文件的扩展名，如果配置多个值的话，用","隔开 -->              <param name="fileUpload.allowedExtensions">.txt</param>            </interceptor-ref></action>

多文件上传：

页面：

<%@ page language="java" pageEncoding="utf-8" contentType="text/html; charset=utf-8"%><%@ taglib uri="/struts-tags"   prefix="s"%><html>  <head>    <title>My JSP 'index.jsp' starting page</title>    </head>  <body>    <form action="${pageContext.request.contextPath}/upload/uploadsAction_saveFiles.action"            name="form1"  method="post"  enctype="multipart/form-data" >             上传文件名称:<input type="file" name="uploadImages"><br>             上传文件名称:<input type="file" name="uploadImages"><br>             上传文件名称:<input type="file" name="uploadImages"><br>                            <input type="submit" value="上传">    </form>  </body></html>

action中的处理方法

        private File [] uploadImages;private String [] uploadImagesContentType;private String [] uploadImagesFileName;public String saveFiles(){System.out.println("UploadsAction ******** saveFiles()");ServletContext sc = ServletActionContext.getServletContext();String path = sc.getRealPath("/fileupload");for(int i=0;i<uploadImages.length;i++){File file = new File(path, uploadImagesFileName[i]);try {FileUtils.copyFile(uploadImages[i], file);} catch (IOException e) {e.printStackTrace();}uploadImages[i].delete();}return "success";}

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