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@ -0,0 +1,331 @@
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/*
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* Copyright 2019-2020 Zheng Jie
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.baiye.util;
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import cn.hutool.core.io.IoUtil;
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import cn.hutool.core.util.IdUtil;
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import cn.hutool.poi.excel.BigExcelWriter;
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import cn.hutool.poi.excel.ExcelUtil;
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import org.apache.poi.util.IOUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.*;
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import java.security.MessageDigest;
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import java.text.DecimalFormat;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.List;
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import java.util.Map;
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/**
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* File工具类，扩展 hutool 工具包
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*
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* @author Zheng Jie
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* @date 2018-12-27
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*/
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public class FileUtil extends cn.hutool.core.io.FileUtil {
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private static final Logger log = LoggerFactory.getLogger(FileUtil.class);
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/**
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* 系统临时目录
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* <br>
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* windows 包含路径分割符，但Linux 不包含,
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* 在windows \\==\ 前提下，
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* 为安全起见 同意拼装 路径分割符，
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* <pre>
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* java.io.tmpdir
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* windows : C:\Users/xxx\AppData\Local\Temp\
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* linux: /temp
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* </pre>
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*/
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public static final String SYS_TEM_DIR = System.getProperty("java.io.tmpdir") + File.separator;
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/**
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* 定义GB的计算常量
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*/
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private static final int GB = 1024 * 1024 * 1024;
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/**
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* 定义MB的计算常量
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*/
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private static final int MB = 1024 * 1024;
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/**
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* 定义KB的计算常量
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*/
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private static final int KB = 1024;
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/**
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* 格式化小数
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*/
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private static final DecimalFormat DF = new DecimalFormat("0.00");
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public static final String IMAGE = "图片";
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public static final String TXT = "文档";
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public static final String MUSIC = "音乐";
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public static final String VIDEO = "视频";
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public static final String OTHER = "其他";
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/**
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* MultipartFile转File
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*/
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public static File toFile(MultipartFile multipartFile) {
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// 获取文件名
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String fileName = multipartFile.getOriginalFilename();
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// 获取文件后缀
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String prefix = "." + getExtensionName(fileName);
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File file = null;
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try {
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// 用uuid作为文件名，防止生成的临时文件重复
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file = File.createTempFile(IdUtil.simpleUUID(), prefix);
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// MultipartFile to File
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multipartFile.transferTo(file);
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} catch (IOException e) {
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log.error(e.getMessage(), e);
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}
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return file;
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}
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/**
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* 获取文件扩展名，不带 .
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*/
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public static String getExtensionName(String filename) {
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if ((filename != null) && (filename.length() > 0)) {
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int dot = filename.lastIndexOf('.');
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if ((dot > -1) && (dot < (filename.length() - 1))) {
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return filename.substring(dot + 1);
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}
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}
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return filename;
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}
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/**
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* Java文件操作 获取不带扩展名的文件名
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*/
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public static String getFileNameNoEx(String filename) {
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if ((filename != null) && (filename.length() > 0)) {
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int dot = filename.lastIndexOf('.');
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if ((dot > -1) && (dot < (filename.length()))) {
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return filename.substring(0, dot);
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}
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}
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return filename;
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}
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/**
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* 文件大小转换
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*/
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public static String getSize(long size) {
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String resultSize;
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if (size / GB >= 1) {
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//如果当前Byte的值大于等于1GB
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resultSize = DF.format(size / (float) GB) + "GB ";
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} else if (size / MB >= 1) {
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//如果当前Byte的值大于等于1MB
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resultSize = DF.format(size / (float) MB) + "MB ";
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} else if (size / KB >= 1) {
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//如果当前Byte的值大于等于1KB
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resultSize = DF.format(size / (float) KB) + "KB ";
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} else {
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resultSize = size + "B ";
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}
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return resultSize;
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}
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/**
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* inputStream 转 File
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*/
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static File inputStreamToFile(InputStream ins, String name) throws Exception {
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File file = new File(SYS_TEM_DIR + name);
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if (file.exists()) {
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return file;
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}
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OutputStream os = new FileOutputStream(file);
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int bytesRead;
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int len = 8192;
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byte[] buffer = new byte[len];
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while ((bytesRead = ins.read(buffer, 0, len)) != -1) {
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os.write(buffer, 0, bytesRead);
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}
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os.close();
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ins.close();
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return file;
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}
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/**
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* 将文件名解析成文件的上传路径
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*/
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public static File upload(MultipartFile file, String filePath) {
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Date date = new Date();
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SimpleDateFormat format = new SimpleDateFormat("yyyyMMddhhmmssS");
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String name = getFileNameNoEx(file.getOriginalFilename());
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String suffix = getExtensionName(file.getOriginalFilename());
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String nowStr = "-" + format.format(date);
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try {
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String fileName = name + nowStr + "." + suffix;
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String path = filePath + fileName;
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// getCanonicalFile 可解析正确各种路径
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File dest = new File(path).getCanonicalFile();
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// 检测是否存在目录
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if (!dest.getParentFile().exists()) {
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if (!dest.getParentFile().mkdirs()) {
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System.out.println("was not successful.");
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}
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}
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// 文件写入
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file.transferTo(dest);
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return dest;
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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}
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return null;
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}
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/**
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* 导出excel
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*/
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public static void downloadExcel(List<Map<String, Object>> list, HttpServletResponse response) throws IOException {
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String tempPath = SYS_TEM_DIR + IdUtil.fastSimpleUUID() + ".xlsx";
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File file = new File(tempPath);
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BigExcelWriter writer = ExcelUtil.getBigWriter(file);
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// 一次性写出内容，使用默认样式，强制输出标题
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writer.write(list, true);
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//response为HttpServletResponse对象
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response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
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//test.xls是弹出下载对话框的文件名，不能为中文，中文请自行编码
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response.setHeader("Content-Disposition", "attachment;filename=file.xlsx");
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ServletOutputStream out = response.getOutputStream();
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// 终止后删除临时文件
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file.deleteOnExit();
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writer.flush(out, true);
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//此处记得关闭输出Servlet流
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IoUtil.close(out);
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}
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public static String getFileType(String type) {
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String documents = "txt doc pdf ppt pps xlsx xls docx";
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String music = "mp3 wav wma mpa ram ra aac aif m4a";
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String video = "avi mpg mpe mpeg asf wmv mov qt rm mp4 flv m4v webm ogv ogg";
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String image = "bmp dib pcp dif wmf gif jpg tif eps psd cdr iff tga pcd mpt png jpeg";
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if (image.contains(type)) {
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return IMAGE;
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} else if (documents.contains(type)) {
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return TXT;
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} else if (music.contains(type)) {
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return MUSIC;
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} else if (video.contains(type)) {
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return VIDEO;
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} else {
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return OTHER;
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}
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}
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/**
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* 判断两个文件是否相同
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*/
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public static boolean check(File file1, File file2) {
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String img1Md5 = getMd5(file1);
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String img2Md5 = getMd5(file2);
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return img1Md5.equals(img2Md5);
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}
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/**
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* 判断两个文件是否相同
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*/
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public static boolean check(String file1Md5, String file2Md5) {
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return file1Md5.equals(file2Md5);
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}
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private static byte[] getByte(File file) {
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// 得到文件长度
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byte[] b = new byte[(int) file.length()];
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try {
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InputStream in = new FileInputStream(file);
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try {
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System.out.println(in.read(b));
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} catch (IOException e) {
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log.error(e.getMessage(), e);
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}
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} catch (FileNotFoundException e) {
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log.error(e.getMessage(), e);
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return null;
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}
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return b;
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}
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private static String getMd5(byte[] bytes) {
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// 16进制字符
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char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
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try {
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MessageDigest mdTemp = MessageDigest.getInstance("MD5");
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mdTemp.update(bytes);
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byte[] md = mdTemp.digest();
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int j = md.length;
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char[] str = new char[j * 2];
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int k = 0;
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// 移位 输出字符串
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for (byte byte0 : md) {
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str[k++] = hexDigits[byte0 >>> 4 & 0xf];
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str[k++] = hexDigits[byte0 & 0xf];
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}
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return new String(str);
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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}
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return null;
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}
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/**
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* 下载文件
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*
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* @param request /
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* @param response /
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* @param file /
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*/
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public static void downloadFile(HttpServletRequest request, HttpServletResponse response, File file, boolean deleteOnExit) {
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response.setCharacterEncoding(request.getCharacterEncoding());
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response.setContentType("application/octet-stream");
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FileInputStream fis = null;
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try {
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fis = new FileInputStream(file);
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response.setHeader("Content-Disposition", "attachment; filename=" + file.getName());
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IOUtils.copy(fis, response.getOutputStream());
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response.flushBuffer();
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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} finally {
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if (fis != null) {
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try {
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fis.close();
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if (deleteOnExit) {
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file.deleteOnExit();
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}
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} catch (IOException e) {
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log.error(e.getMessage(), e);
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}
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}
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}
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}
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public static String getMd5(File file) {
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|
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return getMd5(getByte(file));
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|
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}
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}
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