Struts2实现简单上传

hongjiang1011

于 2008-04-22 22:36:00 发布

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分类专栏：技术类文章文章标签： struts encoding buffer file byte

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本文介绍了一个使用Struts2框架实现文件上传的具体案例，包括web.xml配置、struts.xml配置文件设置、JSP页面展示及Java后端处理逻辑。

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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>

</web-app>

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>

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

<action name="upload" class="com.xie.struts.upload.UploadAction">

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

</action>

</package>

</struts>

upload.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

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

<html>

<head>

<title>upload</title>

</head>

<body>

<s:form action="upload" enctype="multipart/form-data">

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

<s:file name="file" id="file" label="file"/>

<s:submit/>

</s:form>

</body>

</html>

result.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"

pageEncoding="GB18030"%>

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

<html>

<head>

<title>result</title>

</head>

<body>

<s:property value="username" />

<br>

<s:property value="fileFileName" />

</body>

</html>

UploadAction.java

package com.xie.struts.upload;

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 String username;

private File file;

private String fileFileName; // 有属性file+Filename固定组成

private String fileContentType; // 有属性file+ContentType固定组成

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

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 {

InputStream is = new FileInputStream(file);

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

File destFile = new File(root, this.getFileFileName());

OutputStream os = new FileOutputStream(destFile);

byte[] buffer = new byte[400];

int length = 0;

while ((length - is.read(buffer)) > 0) {

os.write(buffer, 0, length);

}

is.close();

os.close();

return SUCCESS;

}

}

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