struts文件上传下载

Struts2

多文件上传和下载



Download.java:



package


com.cjg.action;

import

java.io.InputStream;

import

org.apache.struts2.ServletActionContext;

import

com.opensymphony.xwork2.ActionSupport;

public


class

Download
extends

ActionSupport{

public

InputStream getDownloadFile(){

return

ServletActionContext.getServletContext
().getResourceAsStream(
"/upload/.....txt"
);

}

@Override

public

String execute()
throws

Exception

{

return


SUCCESS

;

}

}

UploadAction.java


package

com.cjg.action;

import

java.io.File;

import

java.io.FileInputStream;

import

java.io.FileOutputStream;

import

java.io.InputStream;

import

java.io.OutputStream;

import

java.util.List;

import

org.apache.struts2.ServletActionContext;

import

com.opensymphony.xwork2.ActionSupport;

public


class

UploadAction
extends

ActionSupport{

private

String
username
;

private

String
password
;

private

List<File>
file
;

private

List<String>
fileFileName
;

private

List<String>
fileContentType
;

public

String getUsername() {

return


username
;

}

public


void

setUsername(String username) {

this

.
username
= username;

}

public

String getPassword() {

return


password
;

}

public


void

setPassword(String password) {

this

.
password
= password;

}

public

List<File> getFile() {

return


file
;

}

public


void

setFile(List<File> file) {

this

.
file
= file;

}

public

List<String> getFileFileName() {

return


fileFileName
;

}

public


void

setFileFileName(List<String> fileFileName) {

this

.
fileFileName
= fileFileName;

}

public

List<String> getFileContentType() {

return


fileContentType
;

}

public


void

setFileContentType(List<String> fileContentType) {

this

.
fileContentType
= fileContentType;

}

public

String
execute()
throws

Exception{

for

(
int

i = 0; i <
file
.size();++i){

if

(
file
==
null

){

super

.addFieldError(
"file:"
,
"file not is
null!"
);

return


ERROR

;

}

InputStream is =
new

FileInputStream
(
file
.get(i));

String root = ServletActionContext.getRequest
().getRealPath(
"/upload"
);

System.
out

.println(root+
"-----------"
);

File destFile =
new

File(root,
this

.getFileFileName().get(i));

OutputStream os =
new

FileOutputStream
(destFile);

byte

[] buffer =
new


byte

[400];

int

length = 0;

while

((length = is.read
(buffer)) > 0){

os.write
(buffer,
0, length);

}

os.close
();

is.close
();

}

return


SUCCESS

;

}

}

Message.properties:


struts.messages.error.content.type.not.allowed=
/u4e0a/u4f20/u6587/u4ef6/u7c7b/u578b/u4e0d/u5141/u8bb8/uff0c/u8bf7/u91cd/u8bd5/uff01

struts.messages.error.file.too.large=
/u4e0a/u4f20/u6587/u4ef6/u8fc7/u5927/uff0c/u8bf7/u91cd/u8bd5/uff01

struts.properties:

struts.i18n.encoding
= gbk

struts.xml

<?
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
>

<
constant
name
=
"struts.custom.i18n.resources"
value
=
"message"
></
constant
>

<
constant
name
=
"struts.multipart.saveDir"
value
=
"e:/"
></
constant
>

<
package
name
=
"struts2"
extends
=
"jfreechart-default"
>

<
action
name
=
"upload"
class
=
"com.cjg.action.UploadAction"
>

<
result
name
=
"success"
>
/upload/uploadResult.jsp
</
result
>

<
result
name
=
"input"
>
/upload/upload.jsp
</
result
>

<
result
name
=
"error"
>
/upload/upload.jsp
</
result
>

<
interceptor-ref
name
=
"fileUpload"
>

<
param
name
=
"maximumSize"
>
409600
</
param
>

<
param
name
=
"allowedTypes"
>

image/bmp,image/jpg,image/x-png,image/gif,image/jpeg,text/plain,application/msword,application/excel,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/zip,application/x-zip-compressed,application/rar,application/octet-stream,application/xml,text/xml

</
param
>

</
interceptor-ref
>

<
interceptor-ref
name
=
"defaultStack"
></
interceptor-ref
>

</
action
>

<
action
name
=
"download"

class
=
"com.cjg.action.Download"
>

<
result
name
=
"success"

type
=
"stream"
>

<
param
name
=
"contentType"
>

image/bmp,image/jpg,image/x-png,image/gif,image/jpeg,text/plain,application/msword,application/excel,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/zip,application/x-zip-compressed,application/rar,application/octet-stream,application/xml,text/xml

</
param
>

<
param
name
=
"contentDisposition"
>

filename="…...txt"

</
param
>

<
param
name
=
"inputName"
>
downloadFile
</
param
>

</
result
>

</
action
>

Upload.jsp:


<%@
page
language
=
"java"
import
=
"java.util.*"
pageEncoding
=
"GBK"
%>

<%@
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
%>
">

<
title
>
My JSP 'uploadsingle.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">

-->

<
script
type
=
"text/javascript"
>

function
addMore()
{

var
td =
document.getElementById(
"more"
);

var
br = document.createElement(
"br"
);

var
input = document.createElement(
"input"
);

var
button = document.createElement(
"input"
);

input.type =
"file"
;

input.name =
"file"
;

button.type =
"button"
;

button.value =
"Remove"
;

button.onclick=
function
()
{

td.removeChild(br);

td.removeChild(input);

td.removeChild(button);

}

td.appendChild(br);

td.appendChild(input);

td.appendChild(button);

}

</
script
>

</
head
>

<
body
>

<
table
align
=
"center"
width
=
"50%"
>

<
tr
>

<
td
>

<
s:fielderror
cssStyle
=
"color:red"

/>

</
td
>

</
tr
>

</
table
>

<
s:form
action
=
"upload"
theme
=
"simple"

enctype
=
"multipart/form-data"
method
=
"post"
>

<
table
align
=
"center"

width
=
"50%"
border
=
"1"
>

<
tr
>

<
td
>

username

</
td
>

<
td
>

<
s:textfield
name
=
"username"
></
s:textfield
>

</
td
>

</
tr
>

<
tr
>

<
td
>

password

</
td
>

<
td
>

<
s:password
name
=
"password"
></
s:password
>

</
td
>

</
tr
>

<
tr
>

<
td
>

file

</
td
>

<
td
id
=
"more"
>

<
s:file
name
=
"file"
></
s:file
><
input
type
=
"button"
value
=
"Add
More.."
onclick
=
"addMore()"
>

</
td
>

</
tr
>

<
tr
>

<
td
>

<
s:submit
value
=
" submit "
></
s:submit
>

</
td
>

<
td
>

<
s:reset
value
=
" reset
"
></
s:reset
>

</
td
>

</
tr
>

</
table
>

</
s:form
>

</
body
>

</
html
>

Web.xml:


<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
?>

<
web-app
version
=
"2.4"

xmlns
=
"http://java.sun.com/xml/ns/j2ee"

xmlns:xsi
=
"http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation
=
"http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >

<
filter
>

<
filter-name
>
struts2
</
filter-name
>

<
filter-class
>
org.apache.struts2.dispatcher.FilterDispatcher
</
filter-class
>

</
filter
>

<
filter-mapping
>

<
filter-name
>
struts2
</
filter-name
>

<
url-pattern
>
/*
</
url-pattern
>

</
filter-mapping
>

<
servlet
>

<
servlet-name
>
UploadServlet
</
servlet-name
>

<
servlet-class
>
com.test.servlet.UploadServlet
</
servlet-class
>

</
servlet
>

<
servlet-mapping
>

<
servlet-name
>
UploadServlet
</
servlet-name
>

<
url-pattern
>
/UploadServlet
</
url-pattern
>

</
servlet-mapping
>

<
welcome-file-list
>

<
welcome-file
>
index.jsp
</
welcome-file
>

</
welcome-file-list
>

</
web-app
>

注意：

1

，单文件上传只要将其中的属性中的

list

去掉。




2

，

allowedType
可以参见
tomcat
中的
web.xml
中的设置。