struts2初学之form上传
以前struts1使用的FormFile我不是很喜欢，这下好了，struts2现在直接拿到File了，OK，上代码！
需要上传的话要用到2个jar包：commons-io-x.jar和commons-fileupload-x.jar导入到lib后即可。
PS：我的工程名字叫TestStruts
1.写action:(BaseAction.java见第一章节)
FormFileStruts2.java:
package com.xuyi.action;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class FormFileStruts2 extends BaseAction {public static final String ROOT = "upload\";private String username;//可以拿到file的流,使用tmp文件private File image;//固定格式取file的真实文件名private String imageFileName;//固定格式private String imageContentType;private String msg;@Overridepublic String execute() throws Exception {//配置src下面的struts.properties中加入struts.multipart.saveDir = /tmp//否则在上传文件时会出现Unable to find 'struts.multipart.saveDir' property setting的错误String rootPath = getSession().getServletContext().getRealPath("/");rootPath += ROOT;mkDirectory(rootPath);System.out.println(rootPath);try {upload(imageFileName, rootPath, image);} catch (RuntimeException e) {e.printStackTrace();}msg = imageFileName;return SUCCESS;}/** * 根据路径创建一系列的目录 * * @param path */boolean mkDirectory(String path) {File file = null;try {file = new File(path);if (!file.exists()) {return file.mkdirs();}} catch (RuntimeException e) {e.printStackTrace();} finally {file = null;}return false;}/** * 上传文件 * * @param savePath * 文件的保存路径 * @param uploadFile * 被上传的文件 * @return uploadFileName */String upload(String uploadFileName, String savePath, File uploadFile) {FileOutputStream fos = null;FileInputStream fis = null;try {fos = new FileOutputStream(savePath + uploadFileName);fis = new FileInputStream(uploadFile);byte[] buffer = new byte[1024];int len = 0;while ((len = fis.read(buffer)) > 0) {fos.write(buffer, 0, len);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {fos.close();fis.close();} catch (IOException e) {e.printStackTrace();}}return uploadFileName;}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;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getMsg() {return msg;}}?src下面新建一个struts.properties文件:
struts.multipart.saveDir = /tmp
?
2.配置struts.xml
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN""http://struts.apache.org/dtds/struts-2.0.dtd"><struts><!--package: name可以随便指定 namespace指定页面的目录（/为根目录） extends指定为 struts-default.xml文件（此文件包含默认的设置和定义） --><package name="struts" namespace="/" extends="struts-default"><!--action:name是访问action的名称 class是action的类 method是访问的action里的方法等同于struts1的method result是返回url--><!-- struts2 file_upload begin --><action name="formFileStruts2" name="code"><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><title>Struts2-form上传示例-提交页</title></head><body><form action="../formFileStruts2.action" method="post" enctype="multipart/form-data">用户名：<input type="text" name="username"><br/><br/>图片：<input type="file" name="image"><br/><br/><input type="submit" value="提交"></form></body></html>
?struts2_form_file_result.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><title>Struts2-form上传示例-结果页</title></head><body>${username}上传图片${msg}成功!</body></html>?4.访问：http://localhost:8080/TestStruts/pages/struts2_form_file_submit.jsp即可操作