mirror of
https://gitee.com/kekingcn/file-online-preview.git
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239 lines
7.7 KiB
Java
239 lines
7.7 KiB
Java
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package cn.keking.utils;
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import com.google.common.collect.Lists;
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import org.redisson.api.RMapCache;
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import org.redisson.api.RedissonClient;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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import java.io.*;
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import java.nio.charset.Charset;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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/**
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*
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* @author yudian-it
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* @date 2017/11/13
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*/
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@Component
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public class FileUtils {
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final String REDIS_FILE_PREVIEW_PDF_KEY = "converted-preview-pdf-file";
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final String REDIS_FILE_PREVIEW_IMGS_KEY = "converted-preview-imgs-file";//压缩包内图片文件集合
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@Autowired
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RedissonClient redissonClient;
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@Value("${file.dir}")
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String fileDir;
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@Value("${converted.file.charset}")
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String charset;
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@Value("${simText}")
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String[] simText;
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/**
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* 已转换过的文件集合(redis缓存)
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* @return
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*/
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public Map<String, String> listConvertedFiles() {
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RMapCache<String, String> convertedList = redissonClient.getMapCache(REDIS_FILE_PREVIEW_PDF_KEY);
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return convertedList;
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}
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/**
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* 已转换过的文件，根据文件名获取
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* @return
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*/
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public String getConvertedFile(String key) {
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RMapCache<String, String> convertedList = redissonClient.getMapCache(REDIS_FILE_PREVIEW_PDF_KEY);
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return convertedList.get(key);
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}
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/**
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* 查看文件类型(防止参数中存在.点号或者其他特殊字符，所以先抽取文件名，然后再获取文件类型)
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*
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* @param url
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* @return
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*/
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public String typeFromUrl(String url) {
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String nonPramStr = url.substring(0, url.indexOf("?") != -1 ? url.indexOf("?") : url.length());
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String fileName = nonPramStr.substring(nonPramStr.lastIndexOf("/") + 1);
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String fileType = fileName.substring(fileName.lastIndexOf(".") + 1);
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if (listPictureTypes().contains(fileType.toLowerCase())) {
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fileType = "picture";
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}
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if (listArchiveTypes().contains(fileType.toLowerCase())) {
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fileType = "compress";
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}
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if (listOfficeTypes().contains(fileType.toLowerCase())) {
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fileType = "office";
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}
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if (Arrays.asList(simText).contains(fileType.toLowerCase())) {
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fileType = "simText";
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}
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return fileType;
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}
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/**
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* 从url中剥离出文件名
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* @param url
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* 格式如：http://keking.ufile.ucloud.com.cn/20171113164107_月度绩效表模板(新).xls?UCloudPublicKey=ucloudtangshd@weifenf.com14355492830001993909323&Expires=&Signature=I D1NOFtAJSPT16E6imv6JWuq0k=
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* @return
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*/
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public String getFileNameFromURL(String url) {
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// 因为url的参数中可能会存在/的情况，所以直接url.lastIndexOf("/")会有问题
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// 所以先从？处将url截断，然后运用url.lastIndexOf("/")获取文件名
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String noQueryUrl = url.substring(0, url.indexOf("?") != -1 ? url.indexOf("?"): url.length());
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String fileName = noQueryUrl.substring(noQueryUrl.lastIndexOf("/") + 1);
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return fileName;
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}
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/**
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* 获取文件后缀
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* @param fileName
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* @return
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*/
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public String getSuffixFromFileName(String fileName) {
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String suffix = fileName.substring(fileName.lastIndexOf("."));
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return suffix;
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}
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/**
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* 从路径中获取
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* @param path
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* 类似这种：C:\Users\yudian-it\Downloads
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* @return
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*/
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public String getFileNameFromPath(String path) {
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return path.substring(path.lastIndexOf(File.separator) + 1);
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}
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public List<String> listPictureTypes(){
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List<String> list = Lists.newArrayList();
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list.add("jpg");
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list.add("jpeg");
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list.add("png");
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list.add("gif");
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list.add("bmp");
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return list;
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}
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public List<String> listArchiveTypes(){
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List<String> list = Lists.newArrayList();
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list.add("rar");
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list.add("zip");
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list.add("jar");
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list.add("7-zip");
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list.add("tar");
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list.add("gzip");
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list.add("7z");
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return list;
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}
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public List<String> listOfficeTypes() {
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List<String> list = Lists.newArrayList();
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list.add("docx");
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list.add("doc");
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list.add("xls");
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list.add("xlsx");
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list.add("ppt");
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list.add("pptx");
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return list;
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}
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/**
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* 获取相对路径
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* @param absolutePath
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* @return
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*/
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public String getRelativePath(String absolutePath) {
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return absolutePath.substring(fileDir.length());
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}
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public void addConvertedFile(String fileName, String value){
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RMapCache<String, String> convertedList = redissonClient.getMapCache(REDIS_FILE_PREVIEW_PDF_KEY);
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convertedList.fastPut(fileName, value);
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}
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/**
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* 获取redis中压缩包内图片文件
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* @param fileKey
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* @return
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*/
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public List getRedisImgUrls(String fileKey){
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RMapCache<String, List> convertedList = redissonClient.getMapCache(REDIS_FILE_PREVIEW_IMGS_KEY);
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return convertedList.get(fileKey);
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}
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/**
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* 设置redis中压缩包内图片文件
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* @param fileKey
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* @param imgs
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*/
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public void setRedisImgUrls(String fileKey,List imgs){
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RMapCache<String, List> convertedList = redissonClient.getMapCache(REDIS_FILE_PREVIEW_IMGS_KEY);
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convertedList.fastPut(fileKey,imgs);
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}
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/**
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* 判断文件编码格式
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* @param path
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* @return
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*/
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public String getFileEncodeUTFGBK(String path){
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String enc = Charset.forName("GBK").name();
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File file = new File(path);
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InputStream in= null;
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try {
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in = new FileInputStream(file);
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byte[] b = new byte[3];
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in.read(b);
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in.close();
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if (b[0] == -17 && b[1] == -69 && b[2] == -65) {
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enc = Charset.forName("UTF-8").name();
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}
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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System.out.println("文件编码格式为:" + enc);
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return enc;
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}
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/**
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* 对转换后的文件进行操作(改变编码方式)
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* @param outFilePath
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*/
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public void doActionConvertedFile(String outFilePath) {
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StringBuffer sb = new StringBuffer();
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try (InputStream inputStream = new FileInputStream(outFilePath);
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BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, charset))){
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String line;
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while(null != (line = reader.readLine())){
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if (line.contains("charset=gb2312")) {
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line = line.replace("charset=gb2312", "charset=utf-8");
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}
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sb.append(line);
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}
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// 添加sheet控制头
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sb.append("<script src=\"js/jquery-3.0.0.min.js\" type=\"text/javascript\"></script>");
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sb.append("<script src=\"js/excel.header.js\" type=\"text/javascript\"></script>");
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sb.append("<link rel=\"stylesheet\" href=\"http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css\">");
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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// 重新写入文件
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try(FileOutputStream fos = new FileOutputStream(outFilePath);
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BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos))){
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writer.write(sb.toString());
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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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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