图片上传

package com.java.activiti.util;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;


import org.apache.commons.lang.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import sun.misc.BASE64Decoder;

import javax.servlet.http.HttpServletRequest;

/**
 * 图片上传
 * linux下可自动赋权限,可判断windows or linux 按日期分夹存储
 * @author szd
 *
 */

public class Upload {
    
    private static Upload upload = null;
    public static Upload getInstance(){
        if (upload==null) {
            upload=new Upload();
        }
        return upload;
    }
    /**
     * 图片上传
     * @param
     * @param returnUrl
     * @param path
     * @param strFile
     * @param osPlatform
     * @return 
     * @throws IOException
     */

    public static String uploadImage(String image,String lastName, String returnUrl, String path, String strFile, EPlatform osPlatform, String strPermission) throws IOException {
        List<String> imgList=new ArrayList<String>();
        String imagebyte = image;
        String fileF = lastName;
        String msg = "";//返回存储路径
        if((fileF != null && fileF != "") && (imagebyte != null && imagebyte != "")) {
            File targetFile = null;
            String fileName = new Date().getTime() + "_" + new Random().nextInt(1000) + fileF;//新的文件名
            //先判断文件是否存在
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");//设置日期格式
            String fileAdd = df.format(new Date());
            File file1 = new File(path + "/" + fileAdd);
            //如果文件夹不存在则创建
            if (!file1.exists() && !file1.isDirectory()) {
                file1.mkdir();
            }

            targetFile = new File(file1, fileName);
            // 解码，然后将字节转换为文件
            byte[] bytes = new BASE64Decoder().decodeBuffer(imagebyte);
            ByteArrayInputStream ins = new ByteArrayInputStream(bytes);
            byte[] buffer = new byte[1024];
            FileOutputStream out = new FileOutputStream(targetFile);
            int bytesum = 0;
            int byteread = 0;
            while ((byteread = ins.read(buffer)) != -1) {
                bytesum += byteread;
                out.write(buffer, 0, byteread); //文件写操作
            }
            out.close();
            //file[i].transferTo(targetFile);
            msg = returnUrl + fileAdd + "/" + fileName;
            imgList.add(msg);
        }
            //判断当前操作系统是否是windows
        /*if(!"Windows".equals(osPlatform.toString())){
            ProcessUitl.getInstance().chmod("-R 755", strPermission);
        }*/


        return msg;
    }


    public static  List<String> imgUpload(HttpServletRequest request,MultipartFile[] file,String returnUrl) throws IOException {
        //String strFile="pwmgr"+File.separator+"imgs"; //这个就是绝对路径
        String strFile="partyworkmgr"; //这个就是绝对路径
        String strPermission="/partyworkmgr/";
        String strPath ="";
        //获取当前操作系统
        EPlatform osPlatform= OSinfo.getOSname();
        if(!"Windows".equals(osPlatform.toString())){
            //linux 下存储路径
            File fDir=new File(File.separator); //File.separator表示根目录，比如现在就表示在D盘下。
            File f=new File(fDir,strFile);
            strPath = f.toString(); //文件存储位置
        }else{
            //windows 操作系统下文件存储位置
            strPath = request.getSession().getServletContext().getRealPath("upload/imgs"); //文件存储位置
            File filePath = new File(strPath);
            if(!filePath.exists()) {
                filePath.mkdirs();
            }
        }

        //List<String> imgList= Upload.getInstance().uploadImage(file,returnUrl,strPath,strFile,osPlatform,strPermission);
            return  null;
        }




        //
        public static Map<String,Object> imgUpload (Map<String,Object> map,String returnUrl,HttpServletRequest request) throws IOException {
            
            String strFile="partyworkmgr"; //这个就是绝对路径
            String strPermission="/partyworkmgr/";
            String strPath ="";
            //获取当前操作系统
            EPlatform osPlatform= OSinfo.getOSname();
            if(!"Windows".equals(osPlatform.toString())){
                //linux 下存储路径
                File fDir=new File(File.separator); //File.separator表示根目录，比如现在就表示在D盘下。
                File f=new File(fDir,strFile);
                strPath = f.toString(); //文件存储位置
            }else{
                //windows 操作系统下文件存储位置
                strPath = request.getSession().getServletContext().getRealPath("upload/imgs"); //文件存储位置
                File filePath = new File(strPath);
                if(!filePath.exists()) {
                    filePath.mkdirs();
                }

            }
            List<Map<String,String>> newList = new ArrayList<>();
            String image1 = (String) map.get("image1");
            String image2 = (String) map.get("image2");
            String image3 = (String) map.get("image3");
            String image4 = (String) map.get("image4");
            String image5 = (String) map.get("image5");
            if (StringUtils.isNotBlank(image1)){
                Map<String,String> map1 = new HashMap<>();
                map1.put(image1,map.get("lastName1").toString());
                newList.add(map1);
            }
            if (StringUtils.isNotBlank(image2)){
                Map<String,String> map1 = new HashMap<>();
                map1.put(image2,map.get("lastName2").toString());
                newList.add(map1);
            }
            if (StringUtils.isNotBlank(image3)){
                Map<String,String> map1 = new HashMap<>();
                map1.put(image3,map.get("lastName3").toString());
                newList.add(map1);
            }
            if (StringUtils.isNotBlank(image4)){
                Map<String,String> map1 = new HashMap<>();
                map1.put(image4,map.get("lastName4").toString());
                newList.add(map1);
            }
            if (StringUtils.isNotBlank(image5)){
                Map<String,String> map1 = new HashMap<>();
                map1.put(image5,map.get("lastName5").toString());
                newList.add(map1);
            }
            List<String> imgList = new ArrayList<>();
            for (Map<String,String> im : newList) {
                for (Map.Entry<String, String> entry : im.entrySet()) {
                    String s = Upload.uploadImage(entry.getKey(), entry.getValue(), returnUrl, strPath, strFile, osPlatform, strPermission);
                    imgList.add(s);
                }
            }
            /*for (Map.Entry<String, String> entry : map1.entrySet()) {
                String s =
                imgList.add(s);
            }*/
            //List<String> imgList = Upload.imgUpload(request, file, returnUrl);
            switch (imgList.size()) {
                case 1:
                    map.put("image1",imgList.get(0));
                    break;
                case 2:
                    map.put("image1",imgList.get(0));
                    map.put("image2",imgList.get(1));
                    break;
                case 3:
                    map.put("image1",imgList.get(0));
                    map.put("image2",imgList.get(1));
                    map.put("image3",imgList.get(2));
                    break;
                case 4:
                    map.put("image1",imgList.get(0));
                    map.put("image2",imgList.get(1));
                    map.put("image3",imgList.get(2));
                    map.put("image4",imgList.get(3));
                    break;
                case 5:
                    map.put("image1",imgList.get(0));
                    map.put("image2",imgList.get(1));
                    map.put("image3",imgList.get(2));
                    map.put("image4",imgList.get(3));
                    map.put("image5",imgList.get(4));
                default:
                    break;
            }
        return map;
        }
}