多文件上传MultiFileUploadAction类ActionSupport
package com.struts2_uploadAndDownload.action;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* 多文件上传
* @author Camey
*
*/
@SuppressWarnings("serial")
public class MultiFileUploadAction extends ActionSupport {
// 用户数组来接收上传文件
// private File[] file;//使用Flie对象数组,接收多个上传文件
// private String [] fileFileName;//使用数据保存多个上传文件的文件名
// private String [] fileContentType;//使用数据保存多个上传文件的类型
// private String uploadDir;//保存上传文件的目录,在struts.xml中配置
//
// public String execute(){
// String newFileName=null;
// //循环处理多个上传文件
// for(int i=0; i<file.length; i++){
// //得到当前时间开始流逝的毫秒数,将这个毫秒数做为新的文件名
// long now=new Date().getTime();
// int index=fileFileName[i].lastIndexOf(".");
//
// //得到保存上传文件的真实路径
// String path=ServletActionContext.getServletContext().getRealPath(uploadDir);
// File dir= new File(path);
// //如果目录不存在就创建它
// if (!dir.exists()) {
// dir.mkdir();
// }
// //判断上传文件是否有扩展名
// if (index!=-1) {
// newFileName=now+fileFileName[i].substring(index);
// }else {
// newFileName=Long.toString(now);
// }
//
// BufferedOutputStream bos=null;
// BufferedInputStream bis=null;
// //读取保存在临时目录下的上传文件,写入到新的文件中
// try {
// FileInputStream fis=new FileInputStream(file[i]);
// bis=new BufferedInputStream(fis);
//
// FileOutputStream fos=new FileOutputStream(new File(dir,newFileName));
// bos=new BufferedOutputStream(fos);
//
// byte [] buf=new byte[4096];
// int len=-1;
// while((len=bis.read(buf))!=-1){
// bos.write(buf,0,len);
// }
// } catch (FileNotFoundException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }finally{
// if (bis!=null) {
// try {
// bis.close();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// }
// if (bos!=null) {
// try {
// bos.close();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// }
// }
//
// }
// return SUCCESS;
// }
//
//
// 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;
// }
// public String getUploadDir() {
// return uploadDir;
// }
// public void setUploadDir(String uploadDir) {
// this.uploadDir = uploadDir;
// }
// 用户List来接收上传文件
private List<File> file;
private List<String> fileFileName;
private List<String> fileContentType;
private String uploadDir;
public String execute(){
String newFileName=null;
//循环处理多个上传文件
for(int i=0; i<file.size(); i++){
//得到当前时间开始流逝的毫秒数,将这个毫秒数做为新的文件名
long now=new Date().getTime();
int index=fileFileName.get(i).lastIndexOf(".");
//得到保存上传文件的真实路径
String path=ServletActionContext.getServletContext().getRealPath(uploadDir);
File dir= new File(path);
//如果目录不存在就创建它
if (!dir.exists()) {
dir.mkdir();
}
//判断上传文件是否有扩展名
if (index!=-1) {
newFileName=now+fileFileName.get(i).substring(index);
}else {
newFileName=Long.toString(now);
}
BufferedOutputStream bos=null;
BufferedInputStream bis=null;
//读取保存在临时目录下的上传文件,写入到新的文件中
try {
FileInputStream fis=new FileInputStream(file.get(i));
bis=new BufferedInputStream(fis);
FileOutputStream fos=new FileOutputStream(new File(dir,newFileName));
bos=new BufferedOutputStream(fos);
byte [] buf=new byte[4096];
int len=-1;
while((len=bis.read(buf))!=-1){
bos.write(buf,0,len);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if (bis!=null) {
try {
bis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (bos!=null) {
try {
bos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
return SUCCESS;
}
public List<File> getFile() {
return file;
}
public void setFile(List<File> file) {
this.file = file;
}
public List<String> getFileFileName() {
return fileFileName;
}
public void setFileFileName(List<String> fileFileName) {
this.fileFileName = fileFileName;
}
public List<String> getFileContentType() {
return fileContentType;
}
public void setFileContentType(List<String> fileContentType) {
this.fileContentType = fileContentType;
}
public String getUploadDir() {
return uploadDir;
}
public void setUploadDir(String uploadDir) {
this.uploadDir = uploadDir;
}
}
文件下载Action
package com.struts2_uploadAndDownload.action;
import java.io.InputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.Action;
/**
* 文件下载
* @author Camey
*
*/
public class FileDownloadAction implements Action {
private String inputPath;//下载文件的路径在struts.xml文件中配置
//inputStream属性的getter方法,StreamResult结果类型使用该属性来读取下载文件的内容
public InputStream getInputStream(){
return ServletActionContext.getServletContext().getResourceAsStream(inputPath);
}
public String execute() throws Exception {
// TODO Auto-generated method stub
return SUCCESS;
}
public void setInputPath(String inputPath) {
this.inputPath = inputPath;
}
public String getInputPath() {
return inputPath;
}
}
自定义拦截器,实现动态的设置文件类型以及下载的文件名
package com.struts2_uploadAndDownload.interceptor;
import java.util.HashMap;
import java.util.Map;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.config.entities.ResultConfig;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.interceptor.PreResultListener;
/**
* 自定义拦截器,实现动态的设置文件类型以及下载的文件名
* @author Camey
*
*/
@SuppressWarnings("serial")
public class FileDownloadInterceptor extends AbstractInterceptor {
@Override
public String intercept(ActionInvocation invocation) throws Exception {
// TODO Auto-generated method stub
//调用ActionInvocation类的addPreResultListener方法注册PreResultListener实例
invocation.addPreResultListener(new PreResultListener() {
/*在beforeResult方法中,不能通过invocation.getResult()来得到Result对象,此时Result对象还没有
创建,为null 为了修改传递给StreamResult的参数,可以通过如下方法调用来得到Result的配置信息,
Result的配置信息封装在ResultConfig中*/
public void beforeResult(ActionInvocation invocation, String resultCode) {
// TODO Auto-generated method stub
Map<String, ResultConfig> resultsMap=invocation.getProxy().getConfig().getResults();
ResultConfig finalResultConfig=resultsMap.get(resultCode);
//为了简单起见,这里通过硬编码下载文件的类型和下载文件名
//在实际应用中,你可以读取数据库或配置文件来获取下载文件的信息
//向ResultConfig对象添加参
Map<String, String> configMap=new HashMap<String, String>(finalResultConfig.getParams());
configMap.put("contentType", "image/jpeg");
configMap.put("contentDisposition", "attachment;filename=\"1394544998139.psd\"");
}
});
return invocation.invoke();
}
}
struts.xml配置
<?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> <package name="default" namespace="/" extends="struts-default"> <!-- 定义download拦截器 --> <interceptors> <interceptor name="FileDownloadInterceptor" class="com.struts2_uploadAndDownload.interceptor.FileDownloadInterceptor"/> </interceptors> <action name="MultiFileUploadAction" class="com.struts2_uploadAndDownload.action.MultiFileUploadAction"> <result name="input">multiFileUpload.jsp</result> <result name="success">multiFileSuccess.jsp</result> <param name="uploadDir">uploadFiles</param> </action> <action name="FileDownloadAction" class="com.struts2_uploadAndDownload.action.FileDownloadAction"> <interceptor-ref name="defaultStack"/> <interceptor-ref name="FileDownloadInterceptor"/> <!-- 指定下载文件的路径,该路径相对于web应用程序所在的目录 --> <param name="inputPath">uploadFiles/1394544998139.psd</param> <!-- 使用StreamResult结果类型 --> <result name="success" type="stream"> <!-- inputName默认值是inputStream,如果action中用于读取下载文件内容的属性是 inputStream,那么可以省略这个参数 --> <param name="inputName">inputStream</param> <param name="bufferSize">2048</param> </result> </action> </package> </struts>
上传页面:multiFileUpload.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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 'multiFileUpload.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<s:actionerror/>
<s:form action="MultiFileUploadAction" method="post" enctype="multipart/form-data">
<s:file name="file"></s:file>
<s:file name="file"></s:file>
<s:file name="file"></s:file>
<s:submit value="上传"></s:submit>
</s:form>
</body>
</html>
上传成功页面:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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 'multiFileSuccess.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
上传成功. <br>
文件名: <s:property value="fileFileName"/><br/>
文件类型: <s:property value="fileContentType"/>
</body>
</html>
下载页面: download.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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 'download.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<s:url id="url" action="FileDownloadAction"></s:url>
<s:a href="%{url}">下载</s:a>
</body>
</html>