本篇文章主要介绍了struts2实现多文件上传的示例代码，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
开发环境JDK1.8 eclipse struts2-2.3.31
1.创建web项目
2.导入struts2核心jar包
3.更改web.xml配置文件（只要配置好struts2的Filter就好）
4.创建src/struts.xml文件
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<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
<
struts
>
<!-- 该属性指定需要Struts2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。
如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 -->
<
constant
name
=
"struts.action.extension"
value
=
"do"
/>
<!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->
<
constant
name
=
"struts.serve.static.browserCache"
value
=
"false"
/>
<!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->
<
constant
name
=
"struts.configuration.xml.reload"
value
=
"true"
/>
<!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->
<
constant
name
=
"struts.devMode"
value
=
"true"
/>
<!-- 默认的视图主题 -->
<
constant
name
=
"struts.ui.theme"
value
=
"simple"
/>
<!--<constant name="struts.objectFactory" value="spring" />-->
<!--解决乱码 -->
<
constant
name
=
"struts.i18n.encoding"
value
=
"UTF-8"
/>
<!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) -->
<
constant
name
=
"struts.multipart.maxSize"
value
=
"10701096"
/>
<!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir -->
<
constant
name
=
"struts.multipart.saveDir "
value
=
"d:/tmp"
/>
<
package
name
=
"upload"
extends
=
"struts-default"
>
<
action
name
=
"fileUpload"
class
=
"com.ifan.action.FileUpload"
>
<!-- 动态设置savePath的属性值 -->
<
param
name
=
"savePath"
>WEB-INF/images</
param
>
<
result
name
=
"success"
>/success.jsp</
result
>
<
result
name
=
"input"
>/error.jsp</
result
>
<
interceptor-ref
name
=
"fileUpload"
>
<!-- 文件过滤 -->
<
param
name
=
"allowedTypes"
>image/bmp,image/png,image/gif,image/jpeg</
param
>
<!-- 文件大小, 以字节为单位 -->
<
param
name
=
"maximumSize"
>1025956</
param
>
</
interceptor-ref
>
<!-- 默认拦截器必须放在fileUpload之后，否则无效 -->
<
interceptor-ref
name
=
"defaultStack"
/>
</
action
>
</
package
>
</
struts
>
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5.创建src/com.ifan.action.FileUpload.Java
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package
com.ifan.action;
import
java.io.File;
import
org.apache.commons.io.FileUtils;
import
org.apache.struts2.ServletActionContext;
import
com.opensymphony.xwork2.ActionContext;
import
com.opensymphony.xwork2.ActionSupport;
public
class
FileUpload
extends
ActionSupport{
private
File[] image;
//上传的文件
private
String[] imageFileName;
//文件名称
private
String[] imageContentType;
//文件类型
public
String execute()
throws
Exception {
ServletActionContext.getRequest().setCharacterEncoding(
"UTF-8"
);
String realpath = ServletActionContext.getServletContext().getRealPath(
"/images"
);
System.out.println(realpath);
if
(image !=
null
) {
File savedir=
new
File(realpath);
if
(!savedir.getParentFile().exists())
savedir.getParentFile().mkdirs();
for
(
int
i=
0
;i<image.length;i++){
File savefile =
new
File(savedir, imageFileName[i]);
FileUtils.copyFile(image[i], savefile);
}
ActionContext.getContext().put(
"message"
,
"文件上传成功"
);
}
return
"success"
;
}
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;
}
}
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6.创建WebContent/index.jsp ，作为上传文件的页面
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<%@ page language=
"java"
import
=
"java.util.*"
pageEncoding=
"UTF-8"
%>
<%@ taglib prefix=
"s"
uri=
"/struts-tags"
%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() +
"://"
+ request.getServerName() +
":"
+ request.getServerPort()
+ path +
"/"
;
%>
<!DOCTYPE HTML PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN"
>
<html>
<head>
<base href=
"<%=basePath%>"
rel=
"external nofollow"
>
<title>My JSP
'hello.jsp'
starting page</title>
<meta http-equiv=
"pragma"
content=
"no-cache"
>
<meta http-equiv=
"cache-control"
content=
"no-cache"
>
<meta http-equiv=
"expires"
content=
"0"
>
<meta http-equiv=
"keywords"
content=
"keyword1,keyword2,keyword3"
>
<meta http-equiv=
"description"
content=
"This is my page"
>
<!--
<link rel=
"stylesheet"
type=
"text/css"
href=
"styles.css"
rel=
"external nofollow"
>
-->
</head>
<body>
<!-- Struts2的文件上传标签 -->
<s:form action=
"fileUpload"
namespace=
"/"
method=
"POST"
enctype=
"multipart/form-data"
>
<!-- 该name需要和后台的File类型的名字对应起来，否则将得不到该文件 size 上传文件的大小 -->
<s:file name=
"image"
label=
"Select a File to upload"
size=
"40"
/>
<s:file name=
"image"
label=
"Select a File to upload"
size=
"40"
/>
<s:submit value=
"submit"
name=
"submit"
/>
</s:form>
</body>
</html>
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7.创建WebContent/success.jsp 作为文件上传成功跳转的页面，创建WebContent/error.jsp 作为文件上传失败的页面 ， 创建WebContent/images文件夹，作为上传文件的存储位置
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。