package com.nuvole.util;
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import cn.hutool.core.convert.Convert;
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import java.io.Closeable;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.Calendar;
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import java.util.HashMap;
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/**
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* @author ChenLong
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* @version 1.0
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* @ClassName FileUtil
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* @date 2019/4/15 13:06
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*/
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public class ResourceUtil {
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public static void safeClose(Closeable closeable) {
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if (closeable != null) {
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try {
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closeable.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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// 生成ftp 文件上传路径
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public static String createFilePath() {
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Calendar ca = Calendar.getInstance();
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String year = Convert.toStr(ca.get(Calendar.YEAR));
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String mon = Convert.toStr(ca.get(Calendar.MONTH) + 1);
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String day = Convert.toStr(ca.get(Calendar.DAY_OF_MONTH));
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return "/" + year + "/" + mon + "/" + day + "/";
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}
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/**
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* 生成文件名
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* @author ChenLong
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* @date 2019/4/26 11:22
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* @version 1.0
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* @param ext 文件扩展名 （doc,xls等）
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* @return : java.lang.String
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*/
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public static String createFileName(String ext) {
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Calendar ca = Calendar.getInstance();
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String year = Convert.toStr(ca.get(Calendar.YEAR));
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String mon = Convert.toStr(ca.get(Calendar.MONTH) + 1);
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String day = Convert.toStr(ca.get(Calendar.DAY_OF_MONTH));
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return "/" + year + "/" + mon + "/" + day + "/" + IdGenerator.getUUID() + "." + ext;
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}
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/**
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* 生成文件夹
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* @author ChenLong
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* @date 2019/4/26 11:22
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* @version 1.0
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* @return : java.lang.String
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*/
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public static String createFileFolder() {
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Calendar ca = Calendar.getInstance();
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String year = Convert.toStr(ca.get(Calendar.YEAR));
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String mon = Convert.toStr(ca.get(Calendar.MONTH) + 1);
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String day = Convert.toStr(ca.get(Calendar.DAY_OF_MONTH));
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return "/" + year + "/" + mon + "/" + day + "/";
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}
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// @formatter:off
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/** 猪猪保佑 永无bug
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* _._ _..._ .-', _.._(`))
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* '-. ` ' /-._.-' ',/
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* ) \ '.
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* / _ _ | \
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* | a a / |
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* \ .-. ;
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* '-('' ).-' ,' ;
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* '-; | .'
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* \ \ /
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* | 7 .__ _.-\ \
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* | | | ``/ /` /
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* /,_| | /,_/ /
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* /,_/ '`-'
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*
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* @Author : liu.q [916000612@qq.com]
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* @Date : 2019-04-24 15:32
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* @Description : 获取文件真实类型
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*/
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// @formatter:on
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// 缓存文件头信息-文件头信息
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public static final HashMap<String, String> mFileTypes = new HashMap<String, String>();
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static {
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// images
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mFileTypes.put("FFD8FF", "jpg");
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mFileTypes.put("89504E47", "png");
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mFileTypes.put("47494638", "gif");
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mFileTypes.put("49492A00", "tif");
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mFileTypes.put("424D", "bmp");
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//
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mFileTypes.put("41433130", "dwg"); // CAD
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mFileTypes.put("38425053", "psd");
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mFileTypes.put("7B5C727466", "rtf"); // 日记本
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mFileTypes.put("3C3F786D6C", "xml");
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mFileTypes.put("68746D6C3E", "html");
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mFileTypes.put("44656C69766572792D646174653A", "eml"); // 邮件
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mFileTypes.put("D0CF11E0", "doc");
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mFileTypes.put("D0CF11E0", "xls");//excel2003版本文件
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mFileTypes.put("5374616E64617264204A", "mdb");
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mFileTypes.put("252150532D41646F6265", "ps");
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mFileTypes.put("255044462D312E", "pdf");
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mFileTypes.put("504B0304", "docx");
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mFileTypes.put("504B0304", "xlsx");//excel2007以上版本文件
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mFileTypes.put("52617221", "rar");
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mFileTypes.put("57415645", "wav");
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mFileTypes.put("41564920", "avi");
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mFileTypes.put("2E524D46", "rm");
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mFileTypes.put("000001BA", "mpg");
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mFileTypes.put("000001B3", "mpg");
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mFileTypes.put("6D6F6F76", "mov");
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mFileTypes.put("3026B2758E66CF11", "asf");
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mFileTypes.put("4D546864", "mid");
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mFileTypes.put("1F8B08", "gz");
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}
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public static String getFileType(FileInputStream is) {
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String value = null;
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try {
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byte[] b = new byte[4];
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/*
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* int read() 从此输入流中读取一个数据字节。int read(byte[] b) 从此输入流中将最多 b.length
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* 个字节的数据读入一个 byte 数组中。 int read(byte[] b, int off, int len)
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* 从此输入流中将最多 len 个字节的数据读入一个 byte 数组中。
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*/
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is.read(b, 0, b.length);
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StringBuilder builder = new StringBuilder();
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if (b == null || b.length <= 0) {
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return null;
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}
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String hv;
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for (int i = 0; i < b.length; i++) {
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// 以十六进制（基数 16）无符号整数形式返回一个整数参数的字符串表示形式，并转换为大写
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hv = Integer.toHexString(b[i] & 0xFF).toUpperCase();
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if (hv.length() < 2) {
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builder.append(0);
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}
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builder.append(hv);
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}
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value = builder.toString();
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} catch (Exception e) {
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} finally {
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if (null != is) {
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try {
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is.close();
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} catch (IOException e) {
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}
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}
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}
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return value;
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}
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}
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