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Struts2实现单文件上传

2013-08-07 19:33 288 查看

首先配置一下web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
<init-param>
<param-name>config</param-name>
<param-value>struts-default.xml,struts-plugin.xml,../struts.xml</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

新建一个上传页面：upload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<form action="upload.action" method="post" enctype="multipart/form-data">
file:<input type="file" name="file" /><br>
<input type="submit" value="submit"/>
</form>
</body>
</html>

UploadAction.java:

package com.struts2.action;

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;

/** 文件 */
private File file;

/** 文件名 */
private String fileFileName;

/** 文件类型 */
private String fileContentType;

public File getFile() {
return file;
}

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

public String getFileFileName() {
return fileFileName;
}

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

public String getFileContentType() {
return fileContentType;
}

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

@Override
public String execute() throws Exception {

String uploadPath = ServletActionContext.getServletContext()
.getRealPath("/upload");

InputStream is = new FileInputStream(file);
OutputStream os = new FileOutputStream(new File(uploadPath,
this.fileFileName));

int length = 0;
byte[] buffer = new byte[1024];
while (-1 != (length = is.read(buffer))) {
os.write(buffer, 0, length);
}
is.close();
os.close();

return SUCCESS;
}
}

上传成功后的页面uploadResult.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
upload successfully!
</body>
</html>

最后配置一下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.i18n.encoding" value="UTF-8" />
<constant name="struts.multipart.maxSize" value="104857600" />

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

<!-- 单文件上传 -->
<action name="upload" class="com.struts2.action.UploadAction">
<result name="success">/uploadResult.jsp</result>
</action>

</package>

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