文件上传

今天学习到Struts2的文件上传部分,由于风中叶的视频声音和画面对不起来,于是自己写了一个。代码贡献出来,算是自己初步接触Struts2文件上传的纪念吧。

1、建立web项目,名字为FileUpload

2、导入Struts2的jar包

项目图如下:

upload.jsp的代码为

1 <%@ page language=”java” pageEncoding=”UTF-8″%>
2 <%@ taglib prefix=”s” uri=”/struts-tags”%>
3 <%@ taglib uri=”http://java.sun.com/jsf/html” prefix=”h” %>
4 <%@ taglib uri=”http://java.sun.com/jsf/core” prefix=”f” %>
5 <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
6 <html>
7 <head>
8
9 <meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″>
10
11 <title>上传文件</title>
12
13 </head>
14
15 <body>
16
17 <!– 上传文件表单定义 –>
18
19 <s:form action=”upload” method=”post” enctype=”multipart/form-data”>
20
21
22
23
24 <tr>
25
26 <td>username:</td>
27
28 <td><s:textfield name=”username”></s:textfield></td>
29
30 </tr>
31 <tr>
32
33 <td>password:</td>
34
35 <td><s:password name=”password”></s:password></td>
36
37 </tr>
38
39 <tr>
40
41 <!– 上传文件标签定义 –>
42
43 <td>上传文件:<s:file name=”file”></s:file></td>
44
45 </tr>
46
47 <tr>
48
49 <td align=”left”><s:submit name=”submit” value=”提交”></s:submit></td>
50
51 </tr>
52
53 </s:form>
54
55 </body>
56
57 </html>

因为看了风老师的视频,想与之对应下面的学习,所以添加了username和password。

result.jsp的代码如下

<%@ page language=”java” pageEncoding=”UTF-8″%>
<%@ taglib prefix=”s” uri=”/struts-tags”%>
<%@ taglib uri=”http://java.sun.com/jsf/html” prefix=”h” %>
<%@ taglib uri=”http://java.sun.com/jsf/core” prefix=”f” %>

<%
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>
<meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″>
<title>上传结果</title>
</head>
<body>

userName:${requestScope.username }<br>
password:${requestScope.password }
<br>
上传文件:
<s:property value=”fileFileName” />
</body>
</html>

UploadAction.java代码如下:

package org.lsj;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
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 final static String UPLOADDIR = “/upload”;

private String username;

private String password;

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;
}

private List<File> file;
private List<String> fileFileName;
private List<String> fileContentType;

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++) {
uploadFile(i);
}
return SUCCESS;
}

//上传
private void uploadFile(int i) throws FileNotFoundException, IOException {
try {
InputStream in
= new FileInputStream(file.get(i));
String dir
= ServletActionContext.getRequest().getRealPath(UPLOADDIR);
File uploadFile
= new File(dir, this.getFileFileName().get(i));
OutputStream out
= new FileOutputStream(uploadFile);
byte[] buffer = new byte[1024 * 1024];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer,
0, length);
}

in.close();
out.close();
} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
}
}
}

web.xml代码如下:

<?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”
>
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<filter>
<filter-name>Struts</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>Struts</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

最后是Struts.xml代码:

<?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>

<package name=”C04.4″ extends=”struts-default”>
<action name=”upload” class=”org.lsj.UploadAction”>
<result name=”input”>/upload.jsp</result>
<result name=”success”>/result.jsp</result>
</action>
</package>
</struts>

然后运行成功!

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