struts1文件上传

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上传页面

<%@ page language="java" pageEncoding="UTF-8"%>

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
	<html:base />

	<title>index.jsp</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">
	-->

</head>

<body>
	<br>
	<html:form action="/upload" method="post" focus="Username"
		enctype="multipart/form-data">
		<table border="0">
			<tr>
				<td>
					用户名:
					<br>
				</td>
				<td>
					<html:text property="username" />
					<br>
				</td>
			</tr>
			<tr>
				<td>
					上传文件:
					<br>
				</td>
				<td>
					<html:file property="filename"></html:file>
					<br>
				</td>
			</tr>
			<tr>
				<td colspan="2" align="center">
					<html:submit />
					<br>
				</td>
			</tr>
		</table>
	</html:form>
</body>
</html:html>

form

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

public class UploadForm extends ActionForm {
	private static final long serialVersionUID = 1L;

	private String username;

	private FormFile filename;

	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		return null;
	}

	public void reset(ActionMapping mapping, HttpServletRequest request) {
		try {
			request.setCharacterEncoding("UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public FormFile getFilename() {
		return filename;
	}

	public void setFilename(FormFile filename) {
		this.filename = filename;
	}
}

action

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

import com.strutsFileupload.struts.form.UploadForm;

//使用struts上传文件
public class UploadAction extends Action {

	@SuppressWarnings( { "unchecked", "deprecation" })
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		UploadForm uploadForm = (UploadForm) form;

		//第一步：
		FormFile formFile = uploadForm.getFilename();
		
		//看看两者的路径时候相同...选择用哪个？---测试过，用第一个更好！
		System.out.println(this.getServlet().getServletContext().getRealPath("upload"));
		System.out.println(request.getRealPath("upload"));

		File file = new File(request.getRealPath("upload"));
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(file + "/" + formFile.getFileName());
			//考虑是写一个恒定的byte[]更好(如果很大就成问题了)
			byte[] data = new byte[formFile.getFileSize()];
			data = formFile.getFileData();//第二步：
			fos.write(data);//第三步：
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (fos != null) {
				try {
					fos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return mapping.findForward("success");
	}
}

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