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https://gitee.com/kekingcn/file-online-preview.git
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1.修改包结构为cn.keking,
2.新增压缩包内文件名称排序
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kl
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package cn.keking.web.controller;
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import com.google.common.collect.Lists;
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import cn.keking.param.ReturnResponse;
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import cn.keking.utils.*;
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import org.apache.commons.io.IOUtils;
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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.Controller;
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import org.springframework.ui.Model;
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import org.springframework.util.StringUtils;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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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.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.URLDecoder;
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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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* @author yudian-it
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*/
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@Controller
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public class OnlinePreviewController {
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@Autowired
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private OfficeToPdf officeToPdf;
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@Autowired
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FileUtils fileUtils;
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@Autowired
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DownloadUtils downloadUtils;
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@Autowired
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ZipReader zipReader;
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@Autowired
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SimTextUtil simTextUtil;
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@Value("${file.dir}")
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String fileDir;
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/**
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* @param url
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* @param model
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* @return
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*/
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@RequestMapping(value = "onlinePreview", method = RequestMethod.GET)
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public String onlinePreview(String url, Model model, HttpServletRequest req) throws UnsupportedEncodingException {
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// 路径转码
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String decodedUrl = URLDecoder.decode(url, "utf-8");
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String type = fileUtils.typeFromUrl(url);
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String suffix = suffixFromUrl(url);
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// 抽取文件并返回文件列表
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String fileName = fileUtils.getFileNameFromURL(decodedUrl);
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model.addAttribute("fileType", suffix);
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if (type.equalsIgnoreCase("picture")) {
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List imgUrls = Lists.newArrayList(url);
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try{
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String fileKey = req.getParameter("fileKey");
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imgUrls.clear();
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imgUrls.addAll(fileUtils.getRedisImgUrls(fileKey));
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}catch (Exception e){
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imgUrls = Lists.newArrayList(url);
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}
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model.addAttribute("imgurls", imgUrls);
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model.addAttribute("currentUrl",url);
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return "picture";
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} else if (type.equalsIgnoreCase("simText")) {
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ReturnResponse<String> response = simTextUtil.readSimText(decodedUrl, fileName);
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if (0 != response.getCode()) {
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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model.addAttribute("ordinaryUrl", response.getMsg());
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return "txt";
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} else if (type.equalsIgnoreCase("pdf")) {
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model.addAttribute("pdfUrl", url);
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return "pdf";
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} else if (type.equalsIgnoreCase("compress")) {
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String fileTree = null;
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// 判断文件名是否存在(redis缓存读取)
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if (!StringUtils.hasText(fileUtils.getConvertedFile(fileName))) {
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ReturnResponse<String> response = downloadUtils.downLoad(decodedUrl, suffix, fileName);
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if (0 != response.getCode()) {
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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String filePath = response.getContent();
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if ("zip".equalsIgnoreCase(suffix) || "jar".equalsIgnoreCase(suffix) || "gzip".equalsIgnoreCase(suffix)) {
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fileTree = zipReader.readZipFile(filePath, fileName);
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} else if ("rar".equalsIgnoreCase(suffix)) {
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fileTree = zipReader.unRar(filePath, fileName);
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}
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fileUtils.addConvertedFile(fileName, fileTree);
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} else {
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fileTree = fileUtils.getConvertedFile(fileName);
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}
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if (null != fileTree) {
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model.addAttribute("fileTree", fileTree);
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return "compress";
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} else {
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model.addAttribute("msg", "压缩文件类型不受支持，尝试在压缩的时候选择RAR4格式");
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return "fileNotSupported";
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}
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} else if ("office".equalsIgnoreCase(type)) {
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boolean isHtml = suffix.equalsIgnoreCase("xls")
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|| suffix.equalsIgnoreCase("xlsx");
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String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + (isHtml ? "html" : "pdf");
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// 判断之前是否已转换过，如果转换过，直接返回，否则执行转换
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if (!fileUtils.listConvertedFiles().containsKey(pdfName)) {
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String filePath = fileDir + fileName;
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if (!new File(filePath).exists()) {
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ReturnResponse<String> response = downloadUtils.downLoad(decodedUrl, suffix, null);
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if (0 != response.getCode()) {
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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filePath = response.getContent();
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}
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String outFilePath = fileDir + pdfName;
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if (StringUtils.hasText(outFilePath)) {
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officeToPdf.openOfficeToPDF(filePath, outFilePath);
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File f = new File(filePath);
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if (f.exists()) {
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f.delete();
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}
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if (isHtml) {
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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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fileUtils.doActionConvertedFile(outFilePath);
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}
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// 加入缓存
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fileUtils.addConvertedFile(pdfName, fileUtils.getRelativePath(outFilePath));
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}
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}
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model.addAttribute("pdfUrl", pdfName);
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return isHtml ? "html" : "pdf";
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} else {
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model.addAttribute("msg", "系统还不支持该格式文件的在线预览，" +
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"如有需要请按下方显示的邮箱地址联系系统维护人员");
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return "fileNotSupported";
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}
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}
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/**
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* 多图片切换预览
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*
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* @param model
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* @param req
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* @return
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* @throws UnsupportedEncodingException
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*/
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@RequestMapping(value = "picturesPreview", method = RequestMethod.GET)
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public String picturesPreview(String urls, Model model, HttpServletRequest req) throws UnsupportedEncodingException {
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// 路径转码
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String decodedUrl = URLDecoder.decode(urls, "utf-8");
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// 抽取文件并返回文件列表
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String[] imgs = decodedUrl.split("|");
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List imgurls = Arrays.asList(imgs);
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model.addAttribute("imgurls", imgurls);
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return "picture";
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}
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private String suffixFromUrl(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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return fileType;
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}
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/**
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* 根据url获取文件内容
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* 当pdfjs读取存在跨域问题的文件时将通过此接口读取
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*
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* @param urlPath
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* @param resp
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*/
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@RequestMapping(value = "/getCorsFile", method = RequestMethod.GET)
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public void getCorsFile(String urlPath, HttpServletResponse resp) {
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InputStream inputStream = null;
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try {
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String strUrl = urlPath.trim();
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URL url = new URL(strUrl);
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//打开请求连接
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URLConnection connection = url.openConnection();
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HttpURLConnection httpURLConnection = (HttpURLConnection) connection;
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httpURLConnection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
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inputStream = httpURLConnection.getInputStream();
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byte[] bs = new byte[1024];
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int len;
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while (-1 != (len = inputStream.read(bs))) {
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resp.getOutputStream().write(bs, 0, len);
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}
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (inputStream != null) {
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IOUtils.closeQuietly(inputStream);
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}
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}
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}
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}
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