import java.io.File
import org.apache.commons.io.FileUtils
import org.apache.struts2.ServletActionContext
import com.opensymphony.xwork2.ActionSupport
/**
* 完成文件上传 （不是解析上传内容，因为上传内容 由fileUpload拦截器负责解析）
*
* @author seawind
*
*/
public class UploadAction extends ActionSupport {
// 接收上传内容
// <input type="file" name="upload" />
private File upload// 这里变量名 和 页面表单元素 name 属性一致
private String uploadContentType
private String uploadFileName
public void setUpload(File upload) {
this.upload = upload
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName
}
@Override
public String execute() throws Exception {
if (upload == null) { // 通过xml配置 required校验器 完成校验
// 没有上传文件
return NONE
}
// 将上传文件 保存到服务器端
// 源文件 upload
// 目标文件
File destFile = new File(ServletActionContext.getServletContext()
.getRealPath("/upload") + "/" + uploadFileName)
// 文件复制 使用commons-io包 提供 工具类
FileUtils.copyFile(upload, destFile)
return NONE
}
}
多文件上传
package cn.itcast.struts2.demo1
import java.io.File
import org.apache.commons.io.FileUtils
import org.apache.struts2.ServletActionContext
import com.opensymphony.xwork2.ActionSupport
/**
* 支持多文件上传
*
* @author seawind
*
*/
public class MultiUploadAction extends ActionSupport {
// 接收多文件上传参数，提供数组接收就可以了
private File[] upload
private String[] uploadContentType
private String[] uploadFileName
public void setUpload(File[] upload) {
this.upload = upload
}
public void setUploadContentType(String[] uploadContentType) {
this.uploadContentType = uploadContentType
}
public void setUploadFileName(String[] uploadFileName) {
this.uploadFileName = uploadFileName
}
@Override
public String execute() throws Exception {
for (int i = 0i <upload.lengthi++) {
// 循环完成上传
File srcFile = upload[i]
String filename = uploadFileName[i]
// 定义目标文件
File destFile = new File(ServletActionContext.getServletContext()
.getRealPath("/upload" + "/" + filename))
FileUtils.copyFile(srcFile, destFile)
}
return NONE
}
}
/**上传文件
*/
public class FileAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
try {
FileForm fileform = (FileForm) form
//取得请求的文件集合
Hashtable hash = fileform.getMultipartRequestHandler().getFileElements()
//得到hashtable的枚举值
Enumeration enu = hash.elements()
//如果该枚举值包含有其它的文件
while(enu.hasMoreElements()) {
//得到文件
FormFile file = (FormFile) enu.nextElement()
System.out.println(file)
add(file)
}
return mapping.findForward("yes")
} catch (Exception e) {
e.printStackTrace()
}
return super.execute(mapping, form, request, response)
}
public void add(FormFile file){
try {
//取得写文件的目录
String url=servlet.getServletContext().getRealPath("upload")
File f1=new File(url)
if(!f1.exists()){//如果文件目录不存在
f1.mkdirs()//创建目录
}
String fileName=file.getFileName()
//创建一个文件输入流
InputStream is=file.getInputStream()
OutputStream out=new FileOutputStream(url+"/"+fileName)
int byteRead=0
byte[] by=new byte[8192]
while((byteRead=is.read(by, 0, 8192))!=-1){
out.write(by, 0, byteRead)
}
out.close()
is.close()
file.destroy()
} catch (Exception e) {
e.printStackTrace()
}
}
}
/**
下载文件
*/
页面一开始进去action，action负责把file文件夹下的所有文件读入一个ArrayList中
Action代码如下：
ArrayList list = new ArrayList()
String path=request.getRealPath("/")+"file"
String FullPath
//System.out.println(path)
myDir=new File(path)
list.clear()
contents=myDir.listFiles()
for(int i=0i<contents.lengthi++){
FullPath=contents.getName()
list.add(FullPath)
//System.out.println(FullPath)
}
request.setAttribute("list",list)
ActionForward forward=new ActionForward("/download.jsp")
return forward
然后进入download.jsp中，这个页面主要负责把所有文件显示，并提供下载连接，代码如下：
<%@ page language="java" contentType="text/htmlcharset=GBK" import="java.util.ArrayList"%>
<head>
</style>
</head>
<body>
<%ArrayList list=(ArrayList)request.getAttribute("list")
for(int i=0i<list.size()i++)
{
String a=java.net.URLEncoder.encode((String)list.get(i))
out.print("<a href=./loaded.do?name="+a+">"+list.get(i)+"</a><br>")
}
%>
</body>
</html>
注意，下划线画中的代码的作用，就是解决问题的所在。
接下来可以直接传入到loadedaction中，也可以通过一个form,我演示的是通过一个form
Form代码如下
package org.aeolus.struts.form
import javax.servlet.http.HttpServletRequest
import org.apache.struts.action.ActionErrors
import org.apache.struts.action.ActionForm
import org.apache.struts.action.ActionMapping
public class LoadForm extends ActionForm {
/*
*Generated Methods
*/
private String name
public String getName() {
return name
}
public void setName(String name) {
this.name = name
}
}
接下来就是action的代码
LoadForm doc=(LoadForm)form
String docName = new String(doc.getName().getBytes("8859_1"))
File f
if(docName!=""){
String docFullPath=request.getRealPath("/")
f = new File(docFullPath+"file\\"+docName)
response.reset()
response.setContentType("application/x-msdownloadcharset=GBK")
System.out.print(response.getContentType())
response.setCharacterEncoding("UTF-8")
docName=java.net.URLEncoder.encode(docName,"UTF-8")
response.setHeader("Content-Disposition", "attachmentfilename=" +new String(docName.getBytes("UTF-8"),"GBK"))
BufferedInputStream br = new BufferedInputStream(new FileInputStream(f))
byte[] buf = new byte[1024]
int len = 0
OutputStream out = response.getOutputStream()
while((len = br.read(buf)) >0)
out.write(buf,0,len)
out.close()
response.wait()
ActionForward forward=new ActionForward("/download.jsp")
return forward }
return null
注意，下划线画中的代码的作用，就是解决问题的所在。说明一下：
response.setCharacterEncoding("UTF-8")
docName=java.net.URLEncoder.encode(docName,"UTF-8")
response.setHeader("Content-Disposition", "attachmentfilename=" +new String(docName.getBytes("UTF-8"),"GBK"))
如果不这样做你将要下载的文件名是乱码。
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）