struts2之多个文件上传

通过3种方式模拟多个文件上传，效果如下所示

目录结构

新建Action

第一种方式

package
com.ljq.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;

@SuppressWarnings(
“
serial
“
)

public

class
UploadAction
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;
}

}

第二种方式

package
com.ljq.action;

import
java.io.File;

import
java.io.FileInputStream;

import
java.io.FileOutputStream;

import
org.apache.struts2.ServletActionContext;

import
com.opensymphony.xwork2.ActionSupport;

/**

* 使用数组上传多个文件
*
*
@author
ljq
*

*/

@SuppressWarnings(
“
serial
“
)

public

class
UploadAction2
extends
ActionSupport{

private
File[] image;
//
上传的文件

private
String[] imageFileName;
//
文件名称

private
String[] imageContentType;
//
文件类型

private
String savePath;

@Override

public
String execute()
throws
Exception {

ServletActionContext.getRequest().setCharacterEncoding(
“
UTF-8
“
);

//
取得需要上传的文件数组

File[] files
=
getImage();

if
(files
!=
null

&&
files.length
>

0
) {

for
(
int
i
=

0
; i
<
files.length; i
++
) {

//
建立上传文件的输出流, getImageFileName()[i]

System.out.println(getSavePath()
+

“
\\
“

+
getImageFileName()[i]);
FileOutputStream fos
=

new
FileOutputStream(getSavePath()
+

“
\\
“

+
getImageFileName()[i]);

//
建立上传文件的输入流

FileInputStream fis
=

new
FileInputStream(files[i]);

byte
[] buffer
=

new

byte
[
1024
];

int
len
=

0
;

while
((len
=
fis.read(buffer))
>
0
) {

fos.write(buffer,
0
, len);
}
fos.close();
fis.close();
}
}

return
SUCCESS;
}

public
File[] getImage() {

return
image;
}

public

void
setImage(File[] image) {

this
.image
=
image;
}

public
String[] getImageFileName() {

return
imageFileName;
}

public

void
setImageFileName(String[] imageFileName) {

this
.imageFileName
=
imageFileName;
}

public
String[] getImageContentType() {

return
imageContentType;
}

public

void
setImageContentType(String[] imageContentType) {

this
.imageContentType
=
imageContentType;
}

/**

* 返回上传文件保存的位置
*
*
@return

*
@throws
Exception

*/

public
String getSavePath()
throws
Exception {

return
ServletActionContext.getServletContext().getRealPath(savePath);
}

public

void
setSavePath(String savePath) {

this
.savePath
=
savePath;
}

}

第三种方式

package
com.ljq.action;

import
java.io.File;

import
java.io.FileInputStream;

import
java.io.FileOutputStream;

import
java.util.List;

import
org.apache.struts2.ServletActionContext;

import
com.opensymphony.xwork2.ActionSupport;

/**

* 使用List上传多个文件
*
*
@author
ljq
*

*/

@SuppressWarnings(
“
serial
“
)

public

class
UploadAction3
extends
ActionSupport {

private
List
<
File
>
image;
//
上传的文件

private
List
<
String
>
imageFileName;
//
文件名称

private
List
<
String
>
imageContentType;
//
文件类型

private
String savePath;

@Override

public
String execute()
throws
Exception {

ServletActionContext.getRequest().setCharacterEncoding(
“
UTF-8
“
);

//
取得需要上传的文件数组

List
<
File
>
files
=
getImage();

if
(files
!=

null

&&
files.size()
>

0
) {

for
(
int
i
=

0
; i
<
files.size(); i
++
) {

FileOutputStream fos
=

new
FileOutputStream(getSavePath()
+

“
\\
“

+
getImageFileName().get(i));
FileInputStream fis
=

new
FileInputStream(files.get(i));

byte
[] buffer
=

new

byte
[
1024
];

int
len
=

0
;

while
((len
=
fis.read(buffer))
>

0
) {

fos.write(buffer,
0
, len);
}
fis.close();
fos.close();
}
}

return
SUCCESS;
}

public
List
<
File
>
getImage() {

return
image;
}

public

void
setImage(List
<
File
>
image) {

this
.image
=
image;
}

public
List
<
String
>
getImageFileName() {

return
imageFileName;
}

public

void
setImageFileName(List
<
String
>
imageFileName) {

this
.imageFileName
=
imageFileName;
}

public
List
<
String
>
getImageContentType() {

return
imageContentType;
}

public

void
setImageContentType(List
<
String
>
imageContentType) {

this
.imageContentType
=
imageContentType;
}

/**

* 返回上传文件保存的位置
*
*
@return

*
@throws
Exception

*/

public
String getSavePath()
throws
Exception {

return
ServletActionContext.getServletContext().getRealPath(savePath);
}

public

void
setSavePath(String savePath) {

this
.savePath
=
savePath;
}

}

struts.xml配置文件

<?
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
>

<!–
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
“

/>

<
constant name
=
“
struts.multipart.maxSize
“
value
=
“
10701096
“
/>

<
package
name
=
“
upload
“
namespace
=
“
/upload
“

extends
=
“
struts-default
“
>

<
action name
=
“
*_upload
“

class
=
“
com.ljq.action.UploadAction
“
method
=
“
{1}
“
>

<
result name
=
“
success
“
>/
WEB
–
INF
/
page
/
message.jsp
</
result
>

</
action
>

</
package
>

<
package
name
=
“
upload1
“
namespace
=
“
/upload1
“

extends
=
“
struts-default
“
>

<
action name
=
“
upload1
“

class
=
“
com.ljq.action.UploadAction2
“
method
=
“
execute
“
>

<!–
要创建
/
image文件夹，否则会报找不到文件
–>

<
param name
=
“
savePath
“
>/
image
</
param
>

<
result name
=
“
success
“
>/
WEB
–
INF
/
page
/
message.jsp
</
result
>

</
action
>

</
package
>

<
package
name
=
“
upload2
“
namespace
=
“
/upload2
“

extends
=
“
struts-default
“
>

<
action name
=
“
upload2
“

class
=
“
com.ljq.action.UploadAction3
“
method
=
“
execute
“
>

<!–
要创建
/
image文件夹，否则会报找不到文件
–>

<
param name
=
“
savePath
“
>/
image
</
param
>

<
result name
=
“
success
“
>/
WEB
–
INF
/
page
/
message.jsp
</
result
>

</
action
>

</
package
>

</
struts
>

上传表单页面upload.jsp

<%
@ page language
=
“
java
“

import
=
“
java.util.*
“
pageEncoding
=
“
UTF-8
“
%>

<!
DOCTYPE HTML PUBLIC
“
-//W3C//DTD HTML 4.01 Transitional//EN
“
>

<
html
>

<
head
>

<
title
>
文件上传
</
title
>

<
meta http
–
equiv
=
“
pragma
“
content
=
“
no-cache
“
>

<
meta http
–
equiv
=
“
cache-control
“
content
=
“
no-cache
“
>

<
meta http
–
equiv
=
“
expires
“
content
=
“
0
“
>

</
head
>

<
body
>

<!–
${pageContext.request.contextPath}
/
upload
/
execute_upload.
do

–>

<!–
${pageContext.request.contextPath}
/
upload1
/
upload1.
do

–>

<!–
${pageContext.request.contextPath}
/
upload2
/
upload2.
do

–>

<!–

–>

<
form action
=
“
${pageContext.request.contextPath}/upload2/upload2.do
“
enctype
=
“
multipart/form-data
“
method
=
“
post
“
>

文件1:
<
input type
=
“
file
“
name
=
“
image
“
><
br
/>

文件2:
<
input type
=
“
file
“
name
=
“
image
“
><
br
/>

文件3:
<
input type
=
“
file
“
name
=
“
image
“
><
br
/>

<
input type
=
“
submit
“
value
=
“
上传
“

/>

</
form
>

</
body
>

</
html
>

显示页面message.jsp

<%
@ page language
=
“
java
“

import
=
“
java.util.*
“
pageEncoding
=
“
UTF-8
“
%>

<%
@ taglib uri
=
“
/struts-tags
“
prefix
=
“
s
“
%>

<!
DOCTYPE HTML PUBLIC
“
-//W3C//DTD HTML 4.01 Transitional//EN
“
>

<
html
>

<
head
>

<
title
>
My JSP
‘
message.jsp
‘
starting page
</
title
>