Struts2文件上传下载

package com;

import java.io.File;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class DownLoadAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private String savePath = "file//";//文件上传的路径
private String fileFileName;
private File file;
private String fileContentType;

public String getFileName() {
return fileFileName;
}

public void setFileName(String fileName) {
this.fileFileName = fileName;
}

public File getFile() {
return file;
}

public void setFile(File file) {
this.file = file;
}

public String getFileContentType() {
return fileContentType;
}

public void setFileContentType(String fileContentType) {
this.fileContentType = fileContentType;
}

public String getFileFileName() {
return fileFileName;
}

public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}

public String getSavePath() {
return savePath;
}

public void setSavePath(String savePath) {
this.savePath = savePath;
}

@Override
public String execute() throws Exception {
fileFileName = ServletActionContext.getRequest().getParameter(
"fileName");
return SUCCESS;
}

// 从下载文件原始存放路径读取得到文件输出流
public InputStream getDownloadFile() throws UnsupportedEncodingException {
fileFileName = new String(fileFileName.getBytes("ISO8859-1"), "UTF-8");
System.out.println("fileFileName:Down:"+fileFileName);
return ServletActionContext.getServletContext().getResourceAsStream(
savePath + fileFileName);
}

// 如果下载文件名为中文，进行字符编码转换
public String getDownloadChineseFileName() {
String downloadChineseFileName = fileFileName;

try {
downloadChineseFileName = new String(downloadChineseFileName
.getBytes(), "ISO8859-1");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}

return downloadChineseFileName;
}

}

package com;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

private static final long serialVersionUID = 1L;
private File[] uploadFile;//上传的文件名
private String[] contentType;

private String[] caption;
private String[] uploadFilename;

public String[] getCaption() {
return caption;
}

public void setCaption(String[] caption) {
this.caption = caption;
}

public String[] getContentType() {
return contentType;
}

public void setUploadFileContentType(String[] contentType) {
this.contentType = contentType;
}

public File[] getUploadFile() {
return uploadFile;
}

public void setUploadFile(File[] uploadFile) {
this.uploadFile = uploadFile;
}

public String[] getUploadFilename() {
return uploadFilename;
}

public void setUploadFileFileName(String[] uploadFilename) {
this.uploadFilename = uploadFilename;
}

/**
* 拷贝文件到相应的目录下
* @param src
* @param dst
*/
private static void copy(File src, File dst) {
try {
InputStream in = null;
OutputStream out = null;
try {
in = new BufferedInputStream(new FileInputStream(src));
out = new BufferedOutputStream(new FileOutputStream(dst));
byte[] buffer = new byte[16 * 1024];
while (in.read(buffer) > 0) {
out.write(buffer);
}
} finally {
if (null != in) {
in.close();
}
if (null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public String execute() {
for (int i = 0; i < this.getUploadFile().length; i++) {
File imageFile = null;
imageFile = new File(ServletActionContext.getServletContext()
.getRealPath("/")
+ "file/" + new String(uploadFilename[i]));

copy(this.getUploadFile()[i], imageFile);
}

return SUCCESS;
}

}

<?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>
<!-- developer mode convenient for Debug -->

<constant name="struts.i18n.encoding" value="GBK" />
<constant name="struts.ui.theme" value="simple" />
<constant name="struts.ui.templateDir" value="template" />
<constant name="struts.ui.templateSuffix" value="ftl" />
<package name="uploadFile" extends="struts-default">

<action name="myUpload" class="com.UploadAction">
<interceptor-ref name="fileUpload">
<param name="savePath">/file</param>
<param name="maximumSize">1024000</param>
</interceptor-ref>
<interceptor-ref name="defaultStack" />
<result name="input">/index.jsp</result>
<result name="success">/showUpload.jsp</result>
</action>
<action name="download" class="com.DownLoadAction">
<!-- 设置文件名参数，由页面上传入 -->
<param name="fileName"></param>
<result name="success" type="stream">
<!-- 下载文件类型定义 -->
<param name="contentType">
application/octet-stream
</param>
<!-- 下载文件处理方法 -->
<param name="contentDisposition">
attachment;filename="${downloadChineseFileName}"
</param>
<!-- 下载文件输出流定义 -->
<param name="inputName">downloadFile</param>
<param name="bufferSize">4096</param>
</result>
</action>
</package>
</struts>

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter>
<filter-name>struts-cleanup</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ActionContextCleanUp
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts-cleanup</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<!--添加一个监听器，告诉webapp启动时，就初始化化Spring容器，这要才Spring才可以管理Action
这样Struts可以向Spring索要Action的bean
这个ContextLoaderListener类，初始化时就会初始化Spring容器，加载xml的配置文件，并初始化bean
注意ContextLoaderListener默认会加载/WEB-INF/applicationContext-*.xml这个配置文件，如果你的配置文件不在这个位置
那么你需要重新指定Spring的配置。使用全局参数contextConfigLocation来指定配置文件的位置，当然可以指定多个位置的配置路径，格式如下：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:beans.xml</param-value>
</context-param>
-->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext*.xml</param-value>
</context-param>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

<%@ page language="java" contentType="text/html;charset=gb2312"%>
<%@ taglib prefix="s" uri="/struts-tags"%>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>upload file</title>
<mce:script type="text/javascript"><!--

function addMore() {
var td = document.getElementById("more");
var div = document.createElement("div");
var ss = document.createElement("span");
var input = document.createElement("input");
var span = document.createElement("span");
var text = document.createElement("input");
var button = document.createElement("input");
div.style.marginTop = "4";
ss.innerHTML = "选择文件:";
input.type = "file";
input.name = "uploadFile";
span.innerHTML = "文件资源描述:";
text.type = "text";
text.size = 35;
text.name = "caption";
button.type = "button";
button.value = "移 除";
button.onclick = function() {
td.removeChild(div);
div = null;
fileInputNumber--;
}
div.appendChild(ss);
div.appendChild(input);
div.appendChild(span);
div.appendChild(text);
div.appendChild(button);
td.appendChild(div);
fileInputNumber++;
}
// --></mce:script>
</head>

<body>
<s:fielderror />
<s:form method="post" name="uploadForm" action="myUpload.action"
enctype="multipart/form-data" onsubmit="return check();"
theme="simple">
<tr>
<td id="more">选择文件:<input type="file" name="uploadFile" />文件资源描述:<input
type="text" name="caption" size="35" /><input type="button"
value="添 加" onclick="addMore()" /></td>
</tr>

<tr>
<td align="center"><s:submit value="上传" /> <s:reset value="重置" /></td>
</tr>
</s:form>
</body>
</html>

<%@ page language="java" contentType="text/html;charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>查看上传文件</title>
</head>
<body>
<center>
<table border="1">
<s:iterator value="uploadFilename" status="stat">
<tr>
<td>
<s:property value="%{uploadFilename[#stat.index]}" />
<br />
</td>
<a href="download.action?fileName=<s:property value=" mce_href="download.action?fileName=<s:property value="%{uploadFilename[#stat.index]}" ></a>">下载</a>
</tr>
<tr>
<td>
<s:property value="%{caption[#stat.index]}" />
</td>
</tr>
</s:iterator>
</table>
</center>
</body>
</html>