Struts2上传/下载文件

Action->

 

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@ParentPackage("service-default")
@Results({ @Result(name = "list", location = "/pages/file/upload.jsp") })
public class UploadAction extends BaseAction {
	private static final long serialVersionUID = 4885233632866196355L;
	private final static Logger log = LoggerFactory.getLogger(UploadAction.class);

	private String downpath;
	private String fileName;
	private File file;
	private String[] files;
	InputStream fileInputStream = null;

	@Action("file_index")
	public String list() throws Exception {
		String uploadPath = context.getRealPath(File.separator + "upload");
		File destDir = new File(uploadPath);
		if (destDir.exists() && destDir.isDirectory()) {
			files = destDir.list();
		}

		return "list";
	}

	@Action("file_upload")
	public String file_upload() throws Exception {
		File srcFile = getFile();

		String temp[] = getFileName().replaceAll("\\\\", "/").split("/");
		if (temp.length > 1) {
			setFileName(temp[temp.length - 1]);
		}

		String destFile = context.getRealPath(File.separator + "upload") + File.separator + getFileName();

		FileUtils.copyFile(srcFile, new File(destFile));
		log.debug("save to >" + destFile);

		return list();
	}

	@Action("file_remove")
	public String file_remove() throws Exception {
		String filePath = context.getRealPath(File.separator + "upload") + File.separator + getFileName();
		File file = new File(filePath);
		if (file.exists() && file.isFile()) {
			file.delete();
		}
		return list();
	}

	@Action("file_download")
	public String file_download() throws Exception {
		String filePath = context.getRealPath(File.separator + "upload") + File.separator + getFileName();
		File file = new File(filePath);

		if (file.exists() && file.isFile()) {
			setFileName(file.getName());
			fileInputStream = new BufferedInputStream(new FileInputStream(file));
		}

		return "download";
	}

	public String getFileName() {
		return fileName;
	}

	public void setFileName(String fileName) {
		this.fileName = fileName;
	}

	public File getFile() {
		return file;
	}

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

	public String[] getFiles() {
		return files;
	}

	public void setFiles(String[] files) {
		this.files = files;
	}

	public InputStream getFileInputStream() {
		return fileInputStream;
	}

	public void setFileInputStream(InputStream fileInputStream) {
		this.fileInputStream = fileInputStream;
	}

	public String getDownpath() {
		downpath = context.getContextPath() + "/file_download?fileName=";
		return downpath;
	}

	public void setDownpath(String downpath) {
		this.downpath = downpath;
	}

}

 

 

struts.xml

 

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
	<constant name="struts.devMode" value="true" />
	<constant name="struts.action.extension" value="" />
	<constant name="struts.configuration.xml.reload" value="true" />
	<constant name="struts.multipart.maxSize" value="102400000" />
	<constant name="struts.i18n.encoding" value="utf-8" />
	<constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" />

	<package name="service-default" extends="struts-default">
		<global-results>
			<result name="error">/pages/error.jsp</result>

			<result name="download" type="stream">
				<param name="contentType">application/octet-stream</param>
				<param name="contentDisposition">attachment;filename="${fileName}"</param>
				<param name="inputName">fileInputStream</param>
			</result>

		</global-results>

		<global-exception-mappings>
			<exception-mapping result="error" exception="java.lang.Exception"></exception-mapping>
		</global-exception-mappings>
	</package>
</struts>
 

 

 

Pages

 

<%@ page contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!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>文件上传示例</title>
<script type="text/javascript">
	function remove(fileName) {
		var url="<%=request.getContextPath()%>/file_remove?fileName="+fileName;
		window.document.location = url;
	}

	function download(fileName) {
		var url="<%=request.getContextPath()%>/file_download?fileName="+ fileName;
		window.document.location = url;
	}

	function change(o) {
		document.getElementsByName("fileName")[0].value=o.value;
	}

	function index() {
		var url="<%=request.getContextPath()%>/file_index";
		window.document.location = url;
	}	
</script>
</head>
<body>
	<table border="1" cellpadding="2" cellspacing="5">
		<tr>
			<td align="center">ID</td>
			<td align="center"><a href="#" onclick="index()">INDEX</a></td>
			<td align="center">Func</td>
		</tr>
		<s:iterator value="files" status="st">
			<tr>
				<td><s:property value="#st.index+1" /></td>
				<td><div><s:property value="downpath" /><s:property /></div></td>
				<td>
					<a href="#" onclick="remove('<s:property />')">remove</a> 
					<a href="#" onclick="download('<s:property />')">download</a>
				</td>
			</tr>
		</s:iterator>
	</table>
	<br>
	<s:form name="myform" action="/file_upload" method="POST" enctype="multipart/form-data">
		<s:hidden name="fileName" />

		 <td>
		 	<input type="file" name="file" value="" id="file_upload_file" onchange="change(this)"/>
		 	<input type="submit" value="上传"/>
		 </td>
	</s:form>
</body>
</html>