Struts2之单文件上传

浏览数：41 / 时间：2015年06月09日

1 界面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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 ‘index.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">

</head>

<body>
<form action="fileUpload" method="post" enctype="multipart/form-data">
　　<table><tr><td> 用户名: <input type="text" name="username"></td></tr>
<tr><td>文件选择: <input type="file" name="file" value="浏览"> </td></tr>
<tr><td><input type="submit" value="提交"></td></tr></table>
</form>
</body>
</html>

2action‘类

package org.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.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class FileUploadAction extends ActionSupport
{
private String username;
private File file;
private String fileFileName;
private String fileContentType;

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
{
String root = ServletActionContext.getServletContext().getRealPath("/upload");
System.out.print(root);
InputStream is = new FileInputStream(file);
File a=new File(root, fileFileName);
if(!a.exists()){a.getParentFile().mkdirs();}
OutputStream os = new FileOutputStream(a);
//输出类型
System.out.println("file: " + getFileContentType());

//创建缓冲区
byte[] buffer = new byte[500];
int length = 0;

while(-1 != (length = is.read(buffer, 0, buffer.length)))//将上传上来的文件拷贝到buffer中
{
os.write(buffer);//将buffer中内容写到a文件中
}
os.close();
is.close();
ActionContext.getContext().put("message", "文件上传成功！");
return SUCCESS;
}
}

3struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<constant name="struts.multipart.saveDir" value="/tmp"/>
<package name="default" extends="struts-default">
<action name="fileUpload" class="org.action.FileUploadAction">
<result name="success">/success.jsp</result>
</action>
</package>
</struts>

4转发页面 success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<%
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 ‘success.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">


</head>

<body>
<s:debug></s:debug>
<s:property value="username"/>
${message}
</body>
</html>