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/plain
private 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";
}
}
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";
}基于struts2的文件上传示例,布布扣,bubuko.com
原文：http://blog.csdn.net/kingherooo/article/details/20218997