wms / hhwms · Files

package com.huaheng.common.utils.file;

import com.huaheng.common.exception.file.FileNameLengthLimitExceededException;
import com.huaheng.framework.config.HuaHengConfig;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;

import org.apache.commons.fileupload.FileUploadBase;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.shiro.crypto.hash.Md5Hash;
import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.commons.CommonsMultipartFile;

import java.io.*;

/**
 * 文件上传工具类
 * 
 * @author huaheng
 */
public class FileUploadUtils
{

    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 52428800;

    /**
     * 默认上传的地址
     */
    private static String defaultBaseDir = HuaHengConfig.getProfile();

    /**
     * 默认的文件名最大长度
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 200;

    /**
     * 默认文件类型jpg
     */
    public static final String IMAGE_JPG_EXTENSION = ".jpg";

    /**
     * 图片类型png
     */
    public static final String IMAGE_PNG_EXTENSION = ".png";

    /**
     * 图片类型ico
     */
    public static final String IMAGE_ICO_EXTENSION = ".ico";

    private static int counter = 0;

    public static void setDefaultBaseDir(String defaultBaseDir)
    {
        FileUploadUtils.defaultBaseDir = defaultBaseDir;
    }

    public static String getDefaultBaseDir()
    {
        return defaultBaseDir;
    }

    /**
     * 以默认配置进行文件上传
     *
     * @param file 上传的文件
     * @return 文件名称
     * @throws Exception
     */
    public static final String upload(MultipartFile file) throws IOException
    {
        try
        {
            return upload(getDefaultBaseDir(), file, FileUploadUtils.IMAGE_JPG_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, FileUploadUtils.IMAGE_JPG_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e);
        }
    }

    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param needDatePathAndRandomName 是否需要日期目录和随机文件名前缀
     * @param extension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     */
    public static final String upload(String baseDir, MultipartFile file, String extension)

            throws FileUploadBase.FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException

    {

        int fileNamelength = file.getOriginalFilename().length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(file.getOriginalFilename(), fileNamelength,
                    FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file);

        String fileName = encodingFilename(file.getOriginalFilename(), extension);

        File desc = getAbsoluteFile(baseDir, baseDir + fileName);
        file.transferTo(desc);
        return fileName;
    }

    private static final File getAbsoluteFile(String uploadDir, String filename) throws IOException
    {
        File desc = new File(File.separator + filename);

        if (!desc.getParentFile().exists())
        {
            desc.getParentFile().mkdirs();
        }
        if (!desc.exists())
        {

//            desc.createNewFile();

        }
        return desc;
    }

    public static final String upload(String baseDir, MultipartFile file, int log)
            throws FileUploadBase.FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException
    {

        int fileNamelength = file.getOriginalFilename().length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(file.getOriginalFilename(), fileNamelength,
                    FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file);

        String fileName = file.getOriginalFilename();

        File desc = getAbsoluteFile(baseDir, baseDir + fileName);
        file.transferTo(desc);
        return fileName;
    }

    /**
     * 编码文件名
     */
    private static final String encodingFilename(String filename, String extension)
    {
        filename = filename.replace("_", " ");
        filename = new Md5Hash(filename + System.nanoTime() + counter++).toHex().toString() + extension;
        return filename;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @return
     * @throws FileSizeLimitExceededException 如果超出最大大小
     */

    public static final void assertAllowed(MultipartFile file) throws FileUploadBase.FileSizeLimitExceededException

    {
        long size = file.getSize();
        if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE)
        {

            throw new FileUploadBase.FileSizeLimitExceededException("not allowed upload upload", size, DEFAULT_MAX_SIZE);

        }
    }

    /**
     * 公司logo，icon图片上传路径
     * @return
     * @throws FileNotFoundException
     */
    public static String getCorporationUploadPath() throws FileNotFoundException {
        //上传到resource/static/corporation目录下,jar包布署时无法实现
//        String path = ResourceUtils.getURL("classpath:").getPath()+"static/";
        //上传到huangheng.profile配置的目录下
        String path = getDefaultBaseDir();
        return path;
    }

    public static final MultipartFile fileToMultipartFile(File file) {
        FileItem fileItem = createFileItem(file);
        MultipartFile multipartFile = new CommonsMultipartFile(fileItem);
        return multipartFile;
    }
    private static FileItem createFileItem(File file) {
        FileItemFactory factory = new DiskFileItemFactory(16, null);
        FileItem item = factory.createItem("textField", "text/plain", true, file.getName());
        int bytesRead = 0;
        byte[] buffer = new byte[8192];
        try {
            FileInputStream
                    fis = new FileInputStream(file);
            OutputStream
                    os = item.getOutputStream();
            while ((bytesRead = fis.read(buffer, 0, 8192)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
            os.close();
            fis.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return item;
    }

}