Struts2文件上传下载
文件上传
/**
*
*/
package com.zdvictory.taurus.filesupload;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.*;
import com.zdvictory.taurus.common.util.*;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper;
/** *
*/
public class UploadFileHandler {
private static int BUFFER_SIZE = 8192;
/**
* 上传附件操作 传递参数:系统参数配置设置的参数名称
*/
@SuppressWarnings("unchecked")
public static List<Attachment> upload(String sysParaName) throws Exception {
// 文件保存路径
String path = SysParaFinder.getSysParaValue(sysParaName);
List<Attachment> list = new ArrayList<Attachment>();
MultiPartRequestWrapper request = (MultiPartRequestWrapper) ServletActionContext
.getRequest();
Enumeration enu = request.getFileParameterNames();
while (enu.hasMoreElements()) { // 对每一个文件域进行遍历
String controlName = (String) enu.nextElement();
String[] fileNames = request.getFileNames(controlName);
File[] uploadFiles = request.getFiles(controlName);
for (int i = 0; i < uploadFiles.length; i++) {
File uploadFile = uploadFiles[i];
if (!uploadFile.exists())
continue;
// 如果文件夹不存在,创建文件夹,将文件保存到目录
File dir = new File(request.getRealPath("/") + path);
if (!dir.exists())
dir.mkdirs();
String ext = fileNames[i].substring(fileNames[i].indexOf("."),
fileNames[i].length());// 获取文件扩展名
String filename = UUID.randomUUID().toString() + ext;
File file = new File(request.getRealPath("/") + path + filename);
byte[] data = new byte[BUFFER_SIZE];
int byteRead = -1;
FileInputStream in = new FileInputStream(uploadFile);
FileOutputStream out = new FileOutputStream(file);
while ((byteRead = in.read(data)) != -1) {
out.write(data, 0, byteRead);
out.flush();
}
out.close();
in.close();
// 设置附件对象属性
Attachment attach = new Attachment();
attach.setFilename(fileNames[i]);
attach.setContentType(ext);
attach.setFilepathname(path + filename);
attach.setFilesize(uploadFile.length());
list.add(attach);
}
}
return list;
}
}
文件下载
public String download() throws Exception {
redheadTemplate = redheadTemplateManager.findById(Long
.valueOf(getId()[0]));
String name = redheadTemplate.getName()
+ redheadTemplate.getFilepathname().substring(
redheadTemplate.getFilepathname().lastIndexOf("."),
redheadTemplate.getFilepathname().length());
this.setFilename(new String(name.getBytes(), "ISO8859-1"));
this.setFilepathname(redheadTemplate.getFilepathname());
return "download";
}
文件下载配置文件
<result name="download" type="stream">
<!-- 下载文件类型 -->
<param name="contentType">
application/octet-stream
</param>
<!-- 默认为 inline(在线打开),设置为 attachment 将会告诉浏览器下载该文件,filename 指定下载文
件保存时的文件名,若未指定将会是以浏览的页面名作为文件名,如以 download.action 作为文件名,
这里使用的是动态文件名,${filename}, 它将通过 Action 的 getFilename() 获得文件名 -->
<param name="contentDisposition">
attachment;filename="${filename}"
</param>
<!-- 下载的InputStream流,Struts2自动对应Action中的getDownloadFile方法,该方法必须返回InputStream类型 -->
<param name="inputName">downloadFile</param>
<!-- 输出时缓冲区的大小 -->
<param name="bufferSize">8192</param>
</result>
struts2文件上传下载
猜你喜欢
转载自chenshengzun.iteye.com/blog/1167484
今日推荐
周排行