package com.jcdm.common.utils.file;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.ArrayUtils;
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import com.jcdm.common.config.MesConfig;
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import com.jcdm.common.utils.DateUtils;
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import com.jcdm.common.utils.StringUtils;
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import com.jcdm.common.utils.uuid.IdUtils;
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import org.apache.commons.io.FilenameUtils;
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/**
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* 文件处理工具类
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*
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* @author jc
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*/
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public class FileUtils
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{
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public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";
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/**
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* 输出指定文件的byte数组
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*
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* @param filePath 文件路径
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* @param os 输出流
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* @return
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*/
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public static void writeBytes(String filePath, OutputStream os) throws IOException
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{
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FileInputStream fis = null;
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try
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{
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File file = new File(filePath);
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if (!file.exists())
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{
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throw new FileNotFoundException(filePath);
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}
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fis = new FileInputStream(file);
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byte[] b = new byte[1024];
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int length;
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while ((length = fis.read(b)) > 0)
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{
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os.write(b, 0, length);
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}
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}
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catch (IOException e)
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{
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throw e;
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}
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finally
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{
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IOUtils.close(os);
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IOUtils.close(fis);
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}
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}
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/**
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* 写数据到文件中
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*
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* @param data 数据
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* @return 目标文件
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* @throws IOException IO异常
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*/
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public static String writeImportBytes(byte[] data) throws IOException
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{
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return writeBytes(data, MesConfig.getImportPath());
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}
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/**
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* 写数据到文件中
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*
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* @param data 数据
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* @param uploadDir 目标文件
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* @return 目标文件
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* @throws IOException IO异常
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*/
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public static String writeBytes(byte[] data, String uploadDir) throws IOException
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{
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FileOutputStream fos = null;
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String pathName = "";
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try
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{
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String extension = getFileExtendName(data);
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pathName = DateUtils.datePath() + "/" + IdUtils.fastUUID() + "." + extension;
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File file = FileUploadUtils.getAbsoluteFile(uploadDir, pathName);
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fos = new FileOutputStream(file);
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fos.write(data);
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}
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finally
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{
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IOUtils.close(fos);
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}
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return FileUploadUtils.getPathFileName(uploadDir, pathName);
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}
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/**
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* 删除文件
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*
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* @param filePath 文件
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* @return
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*/
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public static boolean deleteFile(String filePath)
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{
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boolean flag = false;
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File file = new File(filePath);
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// 路径为文件且不为空则进行删除
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if (file.isFile() && file.exists())
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{
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flag = file.delete();
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}
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return flag;
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}
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/**
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* 文件名称验证
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*
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* @param filename 文件名称
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* @return true 正常 false 非法
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*/
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public static boolean isValidFilename(String filename)
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{
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return filename.matches(FILENAME_PATTERN);
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}
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/**
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* 检查文件是否可下载
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*
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* @param resource 需要下载的文件
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* @return true 正常 false 非法
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*/
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public static boolean checkAllowDownload(String resource)
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{
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// 禁止目录上跳级别
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if (StringUtils.contains(resource, ".."))
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{
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return false;
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}
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// 检查允许下载的文件规则
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if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource)))
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{
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return true;
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}
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// 不在允许下载的文件规则
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return false;
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}
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/**
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* 下载文件名重新编码
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*
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* @param request 请求对象
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* @param fileName 文件名
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* @return 编码后的文件名
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*/
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public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException
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{
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final String agent = request.getHeader("USER-AGENT");
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String filename = fileName;
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if (agent.contains("MSIE"))
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{
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// IE浏览器
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filename = URLEncoder.encode(filename, "utf-8");
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filename = filename.replace("+", " ");
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}
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else if (agent.contains("Firefox"))
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{
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// 火狐浏览器
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filename = new String(fileName.getBytes(), "ISO8859-1");
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}
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else if (agent.contains("Chrome"))
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{
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// google浏览器
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filename = URLEncoder.encode(filename, "utf-8");
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}
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else
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{
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// 其它浏览器
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filename = URLEncoder.encode(filename, "utf-8");
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}
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return filename;
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}
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/**
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* 下载文件名重新编码
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*
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* @param response 响应对象
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* @param realFileName 真实文件名
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*/
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public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException
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{
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String percentEncodedFileName = percentEncode(realFileName);
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StringBuilder contentDispositionValue = new StringBuilder();
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contentDispositionValue.append("attachment; filename=")
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.append(percentEncodedFileName)
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.append(";")
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.append("filename*=")
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.append("utf-8''")
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.append(percentEncodedFileName);
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response.addHeader("Access-Control-Expose-Headers", "Content-Disposition,download-filename");
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response.setHeader("Content-disposition", contentDispositionValue.toString());
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response.setHeader("download-filename", percentEncodedFileName);
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}
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/**
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* 百分号编码工具方法
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*
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* @param s 需要百分号编码的字符串
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* @return 百分号编码后的字符串
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*/
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public static String percentEncode(String s) throws UnsupportedEncodingException
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{
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String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
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return encode.replaceAll("\\+", "%20");
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}
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/**
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* 获取图像后缀
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*
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* @param photoByte 图像数据
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* @return 后缀名
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*/
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public static String getFileExtendName(byte[] photoByte)
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{
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String strFileExtendName = "jpg";
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if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56)
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&& ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97))
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{
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strFileExtendName = "gif";
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}
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else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70))
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{
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strFileExtendName = "jpg";
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}
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else if ((photoByte[0] == 66) && (photoByte[1] == 77))
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{
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strFileExtendName = "bmp";
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}
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else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71))
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{
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strFileExtendName = "png";
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}
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return strFileExtendName;
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}
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/**
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* 获取文件名称 /profile/upload/2022/04/16/jcdm.png
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*
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* @param fileName 路径名称
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* @return 没有文件路径的名称
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*/
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public static String getName(String fileName)
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{
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if (fileName == null)
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{
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return null;
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}
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int lastUnixPos = fileName.lastIndexOf('/');
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int lastWindowsPos = fileName.lastIndexOf('\\');
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int index = Math.max(lastUnixPos, lastWindowsPos);
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return fileName.substring(index + 1);
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}
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/**
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* 获取不带后缀文件名称 /profile/upload/2022/04/16/jcdm.png
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*
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* @param fileName 路径名称
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* @return 没有文件路径和后缀的名称
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*/
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public static String getNameNotSuffix(String fileName)
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{
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if (fileName == null)
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{
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return null;
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}
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String baseName = FilenameUtils.getBaseName(fileName);
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return baseName;
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}
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}
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