uploadify java实现多文件上传和预览

uploadify java实现多文件上传和预览

本文实例为大家分享了java文件上传和预览实现代码，供大家参考，具体内容如下

1、下载uploadify插件

2、index.html

<@head/>

<@header/>

上传

取消上传

<@footer/>

3、java文件

package com.frame.core.ctrl;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Date;

import java.util.Map;

import java.util.UUID;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import org.springframework.web.servlet.ModelAndView;

@Controller

public class loginCtrl {

private static Logger log = Logger.getLogger(loginCtrl.class);

@RequestMapping(value = "/goindex")

public ModelAndView goindex() {

ModelAndView mav = new ModelAndView("index");

mav.addObject("name", "笑傲江湖");

mav.addObject("projectName", "Freemarker框架");

return mav;

}

@RequestMapping(value = "/login")

public void login(HttpServletRequest request,HttpServletResponse responhttp://se) throws ServletException, IOException {

request.getSession().setAttribute("username", "身份认证成功");

request.getRequestDispatcher("/index.jsp").forward(request, response);

}

@RequestMapping("/uploadAttach")

public void processUploadDir(ModelMap modelMap,

MultipartHttpServletRequest request, PrintWriter writer) throws Exception {

Map fileMap = request.getFileMap();

String path = request.getSession().getServletContext().getRealPath("/");;

System.out.println("path:"+path);

Date currentTime = new Date();

long prefix = currentTime.getTime();

StringBuffer attachIds = new StringBuffer();

for (Map.Entry f : fileMap.entrySet()) {

MultipartFile file = f.getValue();

if (!isLegalFile(file)) {

String msg = "is a illegal file";

throw new RuntimeException(msg);

}

String originalFileName = prefix + "_" + file.getOriginalFilename();

File fileDir = new File(path + "/upload" + File.separator);

if (!fileDir.exists()) {

fileDir.mkdirs();

}

File files = new File(path + "/upload" + File.separator

+ originalFileName);

FileOutputStream fileOutputStream = null;

try {

fileOutputStream = new FileOutputStream(files);

fileOutputStream.write(file.getBytes());

fileOutputStream.flush();

attachIds.append(originalFileName + ",");

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (fileOutputStream != null) {

try {

fileOutputStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

writer.write(attachIds.toString().substring(0,attachIds.toString().length()-1));

}

private final String[] fileType = new String[]{".dat",".264",".h264",".mp4",".dav",".MP4",".AVI",".ts",".avi",".mpg",".rmvb",".flv",".rm",".mov",".wmv",

".JPG",".bmp",".png",".BMP",".jpg",".PNG",".gif",

".xlsx",".xls",".txt",".pdf",".doc",".docx",

".rar",".zip",".7z"};

private boolean isLegalFile(MultipartFile file) {

String originalFileName = file.getOriginalFilename();

for(String ft : fileType) {

if (originalFileName.endsWith(ft)) {

return true;

}

}

return false;

}

}

效果图：

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