package org.jeecg.modules.system.util;
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import cn.hutool.core.date.DateUtil;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.http.HttpServletRequest;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStreamWriter;
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import java.math.BigDecimal;
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/**
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* Created by YangBin on 2017/9/15.
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*/
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public class FileUtils {
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private static final long MAX_FILE_SIZE = 10 * 1024 * 1024;
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/**
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* 获取服务器临时路径
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*
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* @param request
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* @return
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*/
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public static String serverTempPath(HttpServletRequest request) {
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String fsep = System.getProperty("file.separator");
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String path = request.getSession().getServletContext().getRealPath("");
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if (path.lastIndexOf(fsep) == path.length() - 1) {
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path += "upload" + fsep + "voucher" + fsep;
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} else {
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path += fsep + "upload" + fsep + "voucher" + fsep;
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}
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return path;
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}
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public static String serverTempPathIntactReg(HttpServletRequest request) {
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String fsep = System.getProperty("file.separator");
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String path = request.getSession().getServletContext().getRealPath("");
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if (path.lastIndexOf(fsep) == path.length() - 1) {
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path += "upload" + fsep + "log" + fsep + "error" + fsep;
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} else {
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path += fsep + "upload" + fsep + "log" + fsep + "error" + fsep;
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}
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return path;
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}
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public static String serverTempPathProcess(HttpServletRequest request) {
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String fsep = System.getProperty("file.separator");
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String path = request.getSession().getServletContext().getRealPath("");
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if (path.lastIndexOf(fsep) == path.length() - 1) {
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path += "upload" + fsep + "process" + fsep;
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} else {
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path += fsep + "upload" + fsep + "process" + fsep;
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}
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return path;
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}
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public static String changeFileFormatKb(String flow) {
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BigDecimal flows = new BigDecimal(flow);
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if (flows.compareTo(new BigDecimal(0)) > 0 && flows.compareTo(new BigDecimal(1024)) < 0) {//小于1M
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return flows.toString() + "B";
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} else if (flows.compareTo(new BigDecimal(1024)) >= 0) {
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BigDecimal result = flows.divide(new BigDecimal(1024), 2, BigDecimal.ROUND_HALF_UP);
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return result.toString() + "KB";
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} else {
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return "0";
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}
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}
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/**
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* 得到项目根目录下的绝对路径（磁盘的物理路径）
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*
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* @param request
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* @param newPath
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* @return
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*/
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public static String getFilePath(HttpServletRequest request, String newPath) {
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String fsep = System.getProperty("file.separator");
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String path = request.getSession().getServletContext().getRealPath("/upload");
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path += fsep + newPath;
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return path;
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}
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/**
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* 得到项目根目录下的相对路径 （相对于项目为根路径）
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*
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* @param newPath
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* @return
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*/
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public static String getRelativePath(String newPath) {
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return "/upload/" + newPath;
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}
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/**
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* 方法一:使用 FileWriter 写文件
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*
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* @param filepath 文件目录
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* @param content 待写入内容
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* @throws IOException
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*/
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public static void fileWriterSql(String filepath, String content) throws IOException {
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OutputStreamWriter outputStreamWriter = null;
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try {
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File file = new File(filepath);
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if (!file.exists()) {
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file.createNewFile();
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}
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FileOutputStream outputStream = new FileOutputStream(file);
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if (outputStream != null) {
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outputStreamWriter = new OutputStreamWriter(outputStream, "UTF-8");
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outputStreamWriter.write(content);
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outputStreamWriter.flush();
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}
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} catch (IOException e) {
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e.getMessage();
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} finally {
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try {
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if (outputStreamWriter != null) {
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outputStreamWriter.close();
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}
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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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File file=new File(filepath);
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Writer writer = new OutputStreamWriter(new FileOutputStream(file.getAbsoluteFile()), "UTF-8");
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writer.append(content);
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*/
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}
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/**
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* 文件大小智能转换
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* 会将文件大小转换为最大满足单位
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*
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* @param size（文件大小，单位为B）
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* @return 文件大小
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*/
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public static String formatFileSize(Long size) {
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String sizeName = null;
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if (1024 * 1024 > size && size >= 1024) {
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sizeName = String.format("%.2f", size.doubleValue() / 1024) + "KB";
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} else if (1024 * 1024 * 1024 > size && size >= 1024 * 1024) {
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sizeName = String.format("%.2f", size.doubleValue() / (1024 * 1024)) + "MB";
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} else if (size >= 1024 * 1024 * 1024) {
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sizeName = String.format("%.2f", size.doubleValue() / (1024 * 1024 * 1024)) + "GB";
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} else {
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sizeName = size.toString() + "B";
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}
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return sizeName;
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}
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/**
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* 上传文件工具类
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*
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* @param userPic
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* @param path
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* @param fileName
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* @return
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*/
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public static boolean uploadFile(MultipartFile userPic, String path, String fileName) {
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Long fileSize = userPic.getSize();
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if (fileSize > MAX_FILE_SIZE) {
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return false;
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}
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File targetFile = new File(path, fileName);
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if (!targetFile.exists()) {
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targetFile.mkdirs();
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}
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try {
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userPic.transferTo(targetFile);
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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/**
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* 重命名文件名 加入时间戳
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*
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* @param fileName
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* @return
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*/
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public static String newFileName(String fileName) {
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String suffix = fileName.substring(fileName.lastIndexOf('.'));
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String dateStr = "_" + DateUtil.now();
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String nameFile = fileName.substring(0, fileName.indexOf("."));
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//新文件名
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return nameFile + dateStr + suffix;
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}
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}
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