struts2使用fileUpload拦截器实现文件上传

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Struts2为文件上传提供了支持，借助于fileUpload拦截器，很容易实现文件上传。

index.jsp页面需注意enctype

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>  </head>    <body>      <form action="upload" method="post" enctype="multipart/form-data">       Choose your file       <input type="file" name="myFile"/>       <input type="submit" value="submit"/>      </form>  </body></html>

success.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>  </head>    <body>      Upload file <s:property value="myFileFileName"/> succeed!  </body></html>

error.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>  </head>    <body>      Upload file failed!  </body></html>

这都是最简单的写法，只是实现功能而已。
Action类

import java.io.File;import org.apache.commons.io.FileUtils;import com.opensymphony.xwork2.ActionSupport;public class UploadFile extends ActionSupport {/* * 注意命名要与jsp文件中的name对应 * 假设jsp中,name为xx，那么拦截器可使用的三个参数,命名应为xx,xxFileName,xxContentType */private File myFile;private String myFileFileName;private String myFileContentType;@Overridepublic String execute() {// TODO Auto-generated method stubString finalPath = "E:/uploadFile";try {File finalFile = new File(finalPath, myFileFileName);FileUtils.copyFile(myFile, finalFile);} catch (Exception e) {e.printStackTrace();return ERROR;}return SUCCESS;}public File getMyFile() {return myFile;}public void setMyFile(File myFile) {this.myFile = myFile;}public String getMyFileFileName() {return myFileFileName;}public void setMyFileFileName(String myFileFileName) {this.myFileFileName = myFileFileName;}public String getMyFileContentType() {return myFileContentType;}public void setMyFileContentType(String myFileContentType) {this.myFileContentType = myFileContentType;}}

最后是struts.xml

<?xml version="1.0" encoding="UTF-8" ?>  <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.devMode" value="true" /><constant name="struts.ui.theme" value="simple" /><constant name="struts.i18n.encoding" value="UTF-8" />        <package name="test" namespace="/" extends="struts-default"><action name="upload" class="UploadFile">    <!-- 配置fileUpload拦截器 --><interceptor-ref name="fileUpload">    <!-- 文件类型 --><param name="allowedTypes">image/x-png,image/gif,image/pjpeg</param><!-- 文件大小，单位是字节--><param name="maximumSize">1025956</param></interceptor-ref><!-- 必须要有默认拦截器--><interceptor-ref name="defaultStack" /><result name="success">/success.jsp</result><result name="error">/error.jsp</result></action></package></struts>

这样便可实现文件上传。

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