一、背景
最近公司一个项目要实现一个文件上传以及多文档在线预览的功能，之前一直做无线工具开发的，没有涉及到这些东西。另外项目组缺java开发人员，而且自己也只是一个半吊子前端加小半吊子java开发人员，所以让我一个人先弄个Demo出来瞧瞧。在网上搜索了不少资料，在这里只是整理一下，留作以后查阅。
二、插件以及工具包
1.pdfjs-v1.7.225 前端pdf格式文件的显示组件
2.webuploader-0.1.5 百度的文件上传组件
3.video-js-6.2.5 html5视频播放组件
4.openoffice-4.1.3 本地安装的，这里主要用于文档转pdf的程序
5.jodconverter-core 3.0-beta-4 java调用openoffice的包
其中pdfjs可以用ViewerJS来代替，后者相对于是对前者的封装。另外java包jodconverter也可以用com.artofsolving.jodconverter.2.2.1来代替，根据网上别人说的以及自己小小测试了一下jodconverter.2.2.1也转换pdf的时候要快那么一点点，但是却不支持office2003之后的docx/xlsx/pptx这些文件类型，说是要定制java代码也可以实现支持，本来比较懒也就弃用了。
三、代码
废话说了一大堆先上前端代码，由于是Demo，代码写的很糙；
1.主要页面index.html
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 6 <meta http-equiv="X-UA-Compatible" content="ie=edge"> 7 <title>文件预览Demo</title> 8 <!-- jquery --> 9 <script src="./plugIns/jquery-3.2.1.min.js"></script> 10 <!-- bootstrap --> 11 <link rel="stylesheet" href="./plugIns/bootstrap-3.3.7/css/bootstrap.min.css"> 12 <script src="./plugIns/bootstrap-3.3.7/js/bootstrap.min.js" charset="utf-8"></script> 13 <!-- webuploader --> 14 <link rel="stylesheet" type="text/css" href="./plugIns/webuploader-0.1.5/webuploader.css"> 15 <script type="text/javascript" src="./plugIns/webuploader-0.1.5/webuploader.min.js"></script> 16 <!-- font-awesome --> 17 <link rel="stylesheet" href="./plugIns/font-awesome-4.7.0/css/font-awesome.min.css"> 18 <link rel="stylesheet" href="./css/filepreview/preview.css"> 19 </head> 20 21 <body> 22 <div class="container" style="padding-top:150px;"> 23 <div> 24 <div class="list"> 25 26 </div> 27 </div> 28 <div id="uploader" class="wu-example"> 29 <!--用来存放文件信息--> 30 <div id="thelist" class="uploader-list"></div> 31 <div class="btns"> 32 <div id="picker">选择文件</div> 33 <button id="ctlBtn" class="btn btn-default">开始上传</button> 34 </div> 35 </div> 36 </div> 37 <div class="load"> 38 <img src="./images/loading.gif" alt=""> 39 </div> 40 </body> 41 <script src="./js/filepreview/preview.js" charset="utf-8"></script> 42 <script src="./js/filepreview/upload.js" charset="utf-8"></script> 43 </html>
2.控制文件上传的upload.js
1 $(function() {
2 var $list = $(‘#thelist‘),
3 $btn = $(‘#ctlBtn‘),
4 state = ‘pending‘;
5 var uploader = WebUploader.create({
6 // swf文件路径
7 swf: ‘./plugIns/webuploader-0.1.5/Uploader.swf‘,
8 // 文件接收服务端。
9 server: ‘/file/upload‘,
10 // 选择文件的按钮。可选。
11 // 内部根据当前运行是创建，可能是input元素，也可能是flash.
12 pick: ‘#picker‘,
13 // 不压缩image, 默认如果是jpeg，文件上传前会压缩一把再上传！
14 resize: false,
15 // 开起分片上传。
16 chunked: true,
17 //fileSingleSizeLimit: 10*1024*1024,//限制大小10M，单文件
18 //fileSizeLimit: allMaxSize*1024*1024,//限制大小10M，所有被选文件，超出选择不上
19 //设置允许上传的文件类型，不过点击选择文件的时候会很卡
20 // accept: {
21 // title: ‘Images‘,
22 // extensions: ‘jpg,png‘,
23 // mimeTypes: ‘image/*‘
24 // }
25 });
26 // 当有文件被添加进队列的时候
27 uploader.on(‘fileQueued‘, function(file) {
28 let typeList = [‘png‘, ‘jpg‘, ‘txt‘, ‘xls‘, ‘doc‘, ‘ppt‘, ‘pdf‘, ‘mp4‘,‘docx‘,‘pptx‘,‘xlsx‘];
29 if(!typeList.includes(file.name.split(‘.‘)[1])){
30 alert("不支持的文件类型！");
31 uploader.removeFile( file );
32 return;
33 }
34
35
36 $list.append(‘<div id="‘ + file.id + ‘" class="item">‘ +
37 ‘<h4 class="info">‘ + file.name + ‘</h4>‘ +
38 ‘<p class="state">等待上传...</p>‘ +
39 ‘</div>‘);
40 });
41 // 文件上传过程中创建进度条实时显示。
42 uploader.on(‘uploadProgress‘, function(file, percentage) {
43 var $li = $(‘#‘ + file.id),
44 $percent = $li.find(‘.progress .progress-bar‘);
45
46 // 避免重复创建
47 if (!$percent.length) {
48 $percent = $(‘<div class="progress progress-striped active">‘ +
49 ‘<div class="progress-bar" role="progressbar" style="width: 0%">‘ +
50 ‘</div>‘ +
51 ‘</div>‘).appendTo($li).find(‘.progress-bar‘);
52 }
53
54 $li.find(‘p.state‘).text(‘上传中‘);
55
56 $percent.css(‘width‘, percentage * 100 + ‘%‘);
57 });
58 uploader.on(‘uploadSuccess‘, function(file) {
59 getFileList();
60 $(‘#‘ + file.id).find(‘p.state‘).text(‘已上传‘);
61 });
62
63 uploader.on(‘uploadError‘, function(file) {
64 $(‘#‘ + file.id).find(‘p.state‘).text(‘上传出错‘);
65 });
66
67 uploader.on(‘uploadComplete‘, function(file) {
68 $(‘#‘ + file.id).find(‘.progress‘).fadeOut();
69 });
70
71 uploader.on(‘all‘, function(type) {
72 if (type === ‘startUpload‘) {
73 state = ‘uploading‘;
74 } else if (type === ‘stopUpload‘) {
75 state = ‘paused‘;
76 } else if (type === ‘uploadFinished‘) {
77 state = ‘done‘;
78 }
79
80 if (state === ‘uploading‘) {
81 $btn.text(‘暂停上传‘);
82 } else {
83 $btn.text(‘开始上传‘);
84 }
85 });
86
87 $btn.on(‘click‘, function() {
88 if (state === ‘uploading‘) {
89 uploader.stop();
90 } else {
91 uploader.upload();
92 }
93 });
94 });
3.负责预览的preview.js
1 $(function() {
2 const typeList = [‘png‘, ‘jpg‘, ‘txt‘, ‘xls‘, ‘doc‘, ‘ppt‘, ‘pdf‘,‘docx‘,‘pptx‘,‘xlsx‘];
3 getFileList = function() {
4 $(".list").empty();
5 $.get("/file/list", function(data) {
6 data = JSON.parse(data);
7 for (let file of data) {
8 let htmlStr = ‘<a class="point file" data-file="‘ + file.name + ‘" data-size="‘ + file.size + ‘" data-type="‘+ file.type +‘">‘;
9 if (file.type.toLowerCase() == ‘png‘ || file.type.toLowerCase() == ‘jpg‘) {
10 htmlStr = ‘<a class="file" target="_blank" href="./filelist/‘ + file.name + ‘">‘;
11 } else if (file.type.toLowerCase() == ‘pdf‘) {
12 htmlStr = ‘<a class="file" target="_blank" href="http://localhost:8080/plugIns/pdfjs/web/viewer.html?file=../../../../filelist/‘ + file.name + ‘">‘;
13 } else if (file.type.toLowerCase() == ‘mp4‘) {
14 htmlStr = ‘<a class="file" target="_blank" href="video?path=../../filelist/‘ + file.name + ‘">‘;
15 }
16 let imgName = file.type==‘docx‘||file.type==‘xlsx‘||file.type==‘pptx‘?file.type.substr(0,file.type.length-1):file.type;
17 $(".list").append(
18 ‘<div class="col-xs-6 col-md-2">‘ + htmlStr +
19 ‘<embed src="./images/svg/‘ + imgName + ‘.svg" type="image/svg+xml" /><span>‘ + file.name +
20 ‘</span></a> <i class="fa fa-eye"></i> <span class="number">‘+file.number+‘</span></div>‘
21 );
22 }
23 });
24 }
25 getFileList();
26
27 /**
28 * 无法直接查看的文件，需要server先进行转换
29 */
30 $(".list").on("click", ".point", function() {
31 let date = new Date().getTime();
32 let param = $(this).data("file");
33 let type = $(this).data("type");
34 if (typeList.indexOf(type)==-1) {
35 alert("暂不支持预览的文件类型！");
36 return;
37 }
38 if ($(this).data("size") >= 11534336) {
39 alert("文件太大，暂不支持预览！");
40 return;
41 }
42 $(‘.load‘).addClass(‘active‘);
43 $.ajax({
44 type: ‘post‘,
45 url: ‘/file/preview‘,
46 data: param,
47 contentType: ‘application/json‘,
48 dataType: ‘text‘,
49 success: function(data) {
50 $(‘.load‘).removeClass(‘active‘);
51 console.log("转换耗时===>" + (new Date().getTime() - date) + "ms");
52 window.open("http://localhost:8080/plugIns/pdfjs/web/viewer.html?file=../../../../filelist/temp/" + data + ".pdf");
53 },
54 error: function(error) {
55 $(‘.load‘).removeClass(‘active‘);
56 alert("error!");
57 }
58 });
59 });
60
61 /**
62 * 查看文件，浏览量累加
63 */
64 $(".list").on("click", ".file", function() {
65 let nSpan = $(this).parent().find(‘.number‘);
66 nSpan.text(nSpan.text()/1+1);
67 });
68 });
4.播放mp4格式的video.html
1 <!DOCTYPE html>
2 <html lang="en">
3
4 <head>
5 <meta charset="UTF-8">
6 <meta name="viewport" content="width=device-width, initial-scale=1.0">
7 <meta http-equiv="X-UA-Compatible" content="ie=edge">
8 <title></title>
9 <link rel="stylesheet" href="/plugIns/video-js-6.2.5/video-js.min.css">
10 <!-- If you‘d like to support IE8 -->
11 <script src="/plugIns/jquery-3.2.1.min.js"></script>
12 <script src="/plugIns/video-js-6.2.5/ie8/videojs-ie8.min.js" charset="utf-8"></script>
13 <script src="/Global.js" charset="utf-8"></script>
14 <style media="screen">
15 .videoCont {
16 padding-top: 150px;
17 }
18 </style>
19 </head>
20
21 <body>
22 <div class="videoCont">
23 <video id="my-video" class="video-js" controls preload="auto" width="720" height="480" poster="MY_VIDEO_POSTER.jpg" data-setup="{}">
24 <source src="http://vjs.zencdn.net/v/oceans.mp4" type="video/mp4">
25 <!-- <source src="http://vjs.zencdn.net/v/oceans.webm" type="video/webm">
26 <source src="/filelist/Wildlife.wmv" type="video/wmv"> -->
27 <p class="vjs-no-js">
28 To view this video please enable JavaScript, and consider upgrading to a web browser that
29 <a href="http://videojs.com/html5-video-support/" target="_blank">supports HTML5 video</a>
30 </p>
31 </video>
32 </div>
33 <script src="/plugIns/video-js-6.2.5/video.min.js" charset="utf-8"></script>
34 <script type="text/javascript">
35 let wWidth = document.body.clientWidth;
36 $(‘.videoCont‘).css(‘padding-left‘,(wWidth-$(‘#my-video‘).attr("width"))/2);
37 let path = Global.getParamByKey("path");
38 $("#my-video source[type=‘video/mp4‘]").attr("src",path);
39 var myPlayer = videojs(‘my-video‘);
40 videojs("my-video").ready(function() {
41 var myPlayer = this;
42 myPlayer.play();
43 });
44 </script>
45 </body>
46
47 </html>
5.pom.xml
1 <dependencies> 2 <!-- Spring Boot web依赖 --> 3 <dependency> 4 <groupId>org.springframework.boot</groupId> 5 <artifactId>spring-boot-starter-web</artifactId> 6 </dependency> 7 8 <!-- Junit --> 9 <dependency> 10 <groupId>junit</groupId> 11 <artifactId>junit</artifactId> 12 <version>4.12</version> 13 </dependency> 14 <dependency> 15 <groupId>org.apache.commons</groupId> 16 <artifactId>commons-lang3</artifactId> 17 <version>3.6</version> 18 </dependency> 19 <!-- openoffice --> 20 <dependency> 21 <groupId>org.quartz-scheduler</groupId> 22 <artifactId>quartz</artifactId> 23 <version>2.3.0</version> 24 </dependency> 25 <!-- 不支持03之后的office --> 26 <dependency> 27 <groupId>com.artofsolving</groupId> 28 <artifactId>jodconverter</artifactId> 29 <version>2.2.1</version> 30 </dependency> 31 <!-- 支持03之后的office --> 32 <dependency> 33 <groupId>org.artofsolving.jodconverter</groupId> 34 <artifactId>jodconverter-core</artifactId> 35 <version>3.0-beta-4</version> 36 </dependency> 37 <dependency> 38 <groupId>org.openoffice</groupId> 39 <artifactId>jurt</artifactId> 40 <version>3.0.1</version> 41 </dependency> 42 <dependency> 43 <groupId>org.openoffice</groupId> 44 <artifactId>ridl</artifactId> 45 <version>3.0.1</version> 46 </dependency> 47 <dependency> 48 <groupId>org.openoffice</groupId> 49 <artifactId>juh</artifactId> 50 <version>3.0.1</version> 51 </dependency> 52 <dependency> 53 <groupId>org.openoffice</groupId> 54 <artifactId>unoil</artifactId> 55 <version>3.0.1</version> 56 </dependency> 57 58 <!--jodconverter2.2.1必须依赖slf4j-jdk14必须这个版本，不然源码中日志会报错，很low的一个问题 --> 59 <dependency> 60 <groupId>org.slf4j</groupId> 61 <artifactId>slf4j-jdk14</artifactId> 62 <version>1.4.3</version> 63 </dependency> 64 65 <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> 66 <dependency> 67 <groupId>com.alibaba</groupId> 68 <artifactId>fastjson</artifactId> 69 <version>1.2.35</version> 70 </dependency> 71 72 <dependency> 73 <groupId>commons-fileupload</groupId> 74 <artifactId>commons-fileupload</artifactId> 75 <version>1.3.1</version> 76 </dependency> 77 </dependencies>
6.文档转pdf格式的工具类Office2PdfUtil
1 package org.spring.springboot.util;
2
3 import java.io.File;
4 import java.util.regex.Pattern;
5
6 import org.artofsolving.jodconverter.OfficeDocumentConverter;
7 import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
8 import org.artofsolving.jodconverter.office.OfficeManager;
9
10 public class Office2PdfUtil {
11
12 private static Office2PdfUtil office2PdfUtil = new Office2PdfUtil();
13 private static OfficeManager officeManager;
14 // 服务端口
15 private static int OPEN_OFFICE_PORT[] = { 8100, 8101, 8102, 8103 };
16
17 public static Office2PdfUtil getOffice2PdfUtil() {
18 return office2PdfUtil;
19 }
20
21 /**
22 *
23 * office2Pdf 方法
24 *
25 * @descript：TODO
26 * @param inputFile
27 * 文件全路径
28 * @param pdfFilePath
29 * pdf文件全路径
30 * @return void
31 */
32 public static void office2Pdf(File inputFile, File pdfFile) {
33
34 try {
35 // 打开服务
36 startService();
37 OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);
38 // 开始转换
39 converter.convert(inputFile, pdfFile);
40 // 关闭
41 stopService();
42 System.out.println("运行结束");
43 } catch (Exception e) {
44 // TODO: handle exception
45 e.printStackTrace();
46 }
47 }
48
49 public static void stopService() {
50 if (officeManager != null) {
51 officeManager.stop();
52 }
53 }
54
55 public static void startService() {
56 DefaultOfficeManagerConfiguration configuration = new DefaultOfficeManagerConfiguration();
57 try {
58 configuration.setOfficeHome(getOfficeHome());// 设置安装目录
59 configuration.setPortNumbers(OPEN_OFFICE_PORT); // 设置端口
60 configuration.setTaskExecutionTimeout(1000 * 60 * 5L);
61 configuration.setTaskQueueTimeout(1000 * 60 * 60 * 24L);
62 officeManager = configuration.buildOfficeManager();
63 officeManager.start(); // 启动服务
64 } catch (Exception ce) {
65 System.out.println("office转换服务启动失败!详细信息:" + ce);
66 }
67 }
68
69 /**
70 * openoffice的安装路径
71 *
72 * @return
73 */
74 public static String getOfficeHome() {
75 String osName = System.getProperty("os.name");
76 if (Pattern.matches("Linux.*", osName)) {
77 return "/opt/openoffice.org3";
78 } else if (Pattern.matches("Windows.*", osName)) {
79 return "C:/Program Files (x86)/OpenOffice 4/";
80 } else if (Pattern.matches("Mac.*", osName)) {
81 return "/Application/OpenOffice.org.app/Contents";
82 }
83 return null;
84 }
85 }
这里需要注意的是不需要手动去开启系统中的openoffice，以上代码运行的时候会自动开启。
private static int OPEN_OFFICE_PORT[] = { 8100, 8101, 8102, 8103 }; 这个是openoffice的端口，默认是 ｛8100｝ ，写入多个是为了开启多个Openoffice服务，加快多线程转换的效率。 7.接口类FileController
1 package org.spring.springboot.web;
2
3 import java.io.File;
4 import java.io.IOException;
5 import java.util.ArrayList;
6 import java.util.Iterator;
7
8 import javax.servlet.http.HttpServletRequest;
9 import javax.servlet.http.HttpServletResponse;
10
11 import org.spring.springboot.bean.FileBean;
12 import org.spring.springboot.util.Office2PdfUtil;
13 import org.springframework.web.bind.annotation.GetMapping;
14 import org.springframework.web.bind.annotation.PostMapping;
15 import org.springframework.web.bind.annotation.RequestBody;
16 import org.springframework.web.bind.annotation.RequestMapping;
17 import org.springframework.web.bind.annotation.RestController;
18 import org.springframework.web.multipart.MultipartFile;
19 import org.springframework.web.multipart.MultipartHttpServletRequest;
20 import org.springframework.web.multipart.commons.CommonsMultipartResolver;
21
22 import com.alibaba.fastjson.JSON;
23
24
25 @RestController
26 @RequestMapping("file")
27 public class FileController {
28
29 @GetMapping("list")
30 public String getFileList() {
31 return getFileName();
32 }
33
34 public static String getFileName() {
35 String path = System.getProperty("user.dir") + "\\src\\main\\resources\\static\\filelist"; // 路径
36 File f = new File(path);
37 if (!f.exists()) {
38 System.out.println(path + " not exists");
39 return null;
40 }
41
42 ArrayList<FileBean> files = new ArrayList<>();
43
44 File fa[] = f.listFiles();
45 for (File fs : fa) {
46 if (fs.isFile()) {
47 FileBean fb = new FileBean(fs.getName(), fs.getName().split("\\.")[1], String.valueOf(fs.length()));
48 files.add(fb);
49 }
50 }
51 return JSON.toJSONString(files);
52 }
53
54 @PostMapping(value = "preview", produces = "application/json; charset=utf-8")
55 public String getPreview(@RequestBody String fileName) throws IOException {
56 String sysDir = System.getProperty("user.dir") + "\\src\\main\\resources\\static\\filelist\\";
57 File inputFile = new File(sysDir + fileName);
58 String outputPath = sysDir + "temp";
59 File temp = new File(outputPath);
60 // 目录不存在，创建目录
61 if (!temp.exists()) {
62 temp.mkdir();
63 }
64 File outputFile = new File(
65 outputPath + "\\" + fileName.split("\\.")[0] + "_" + fileName.split("\\.")[1] + ".pdf");
66 // 如果转换后的文件已经存在那么不需要再次转换
67 if (outputFile.exists()) {
68 return fileName.split("\\.")[0]+ "_" + fileName.split("\\.")[1];
69 }
70 //方法一：用com.artofsolving
71 //OpenOfficeUtil.office2Pdf(inputFile, outputFile);
72 //方法二：用org.artofsolving
73 Office2PdfUtil.office2Pdf(inputFile, outputFile);
74 return fileName.split("\\.")[0]+ "_" + fileName.split("\\.")[1];
75 }
76
77 @RequestMapping("/upload")
78 public String upload2(HttpServletRequest request, HttpServletResponse response)
79 throws IllegalStateException, IOException {
80 // 创建一个springmvc上传文件解析器
81 CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
82 // 判断 request 是否有文件上传,即多部分请求
83 if (multipartResolver.isMultipart(request)) {
84 // 转换成多部分request
85 MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
86 // 取得request中的所有文件名
87 Iterator<String> iter = multiRequest.getFileNames();
88 while (iter.hasNext()) {
89 // 记录上传过程起始时的时间，用来计算上传时间
90 int pre = (int) System.currentTimeMillis();
91 // 取得上传文件
92 MultipartFile file = multiRequest.getFile(iter.next());
93 if (file != null) {
94 // 取得当前上传文件的文件名称
95 String myFileName = file.getOriginalFilename();
96 // 如果名称不为“”,说明该文件存在，否则说明该文件不存在
97 if (myFileName.trim() != "") {
98 System.out.println(myFileName);
99 // 重命名上传后的文件名
100 // String fileName = "demoUpload" + file.getOriginalFilename();
101 // 定义上传路径
102 String path = System.getProperty("user.dir") + "\\src\\main\\resources\\static\\filelist\\"
103 + myFileName;
104 File localFile = new File(path);
105 try {
106 file.transferTo(localFile);
107 } catch (IOException e) {
108 e.printStackTrace();
109 }
110 }
111 }
112 // 记录上传该文件后的时间
113 int finaltime = (int) System.currentTimeMillis();
114 System.out.println(finaltime - pre);
115 }
116 }
117 return "/success";
118 }
119 }
8.最后一个和Demo没有关系，完全就是一个多线程转换pdf的一个测试
1 package org.spring.springboot;
2
3 import java.io.File;
4 import java.net.ConnectException;
5 import java.util.concurrent.CountDownLatch;
6
7 import org.spring.springboot.util.Office2PdfUtil;
8 import org.spring.springboot.util.OpenOfficeUtil;
9
10 public class Main extends Thread {
11 private int index;
12 private CountDownLatch latch;
13
14 public Main(int index, CountDownLatch latch) {
15 this.index = index;
16 this.latch = latch;
17 }
18
19 @Override
20 public void run() {
21 super.run();
22 String str = String.format("5m_%s.doc", index);
23 long time = System.currentTimeMillis();
24 work(str);
25 latch.countDown();
26 System.out.println(String.format("文件%s解析耗时：%sms", str, String.valueOf(System.currentTimeMillis() - time)));
27 }
28
29 public static void main(String[] args) {
30 CountDownLatch latch = new CountDownLatch(50);
31 Office2PdfUtil.startService();
32 for (int i = 1; i < 51; i++) {
33 new Main(i, latch).start();
34 }
35 try {
36 long time = System.currentTimeMillis();
37 System.out.println(String.format("开始"));
38 latch.await();
39 Office2PdfUtil.stopService();
40 System.out.println(String.format("所有文件解析耗时：%sms", String.valueOf(System.currentTimeMillis() - time)));
41 } catch (InterruptedException e) {
42 // TODO Auto-generated catch block
43 e.printStackTrace();
44 }
45 }
46
47 public static void work(String fileName) {
48 String sysDir = System.getProperty("user.dir") + "\\src\\main\\resources\\static\\test\\";
49 File inputFile = new File(sysDir + fileName);
50 String outputPath = sysDir + "temp";
51 File outputFile = new File(
52 outputPath + "\\" + fileName.split("\\.")[0] + "_" + fileName.split("\\.")[1] + ".pdf");
53 Office2PdfUtil.office2Pdf(inputFile, outputFile);
54 }
55
56 }
CountDownLatch可以监测多线程运行结束。第30、32行的数字是设置解析的文件数量。 9.python生成多个有内容的文件代码也一并奉上
1 #-*-coding:utf-8-*- 2 def gen_file(path,size): 3 #首先以路径path新建一个文件，并设置模式为写 4 file = open(path,‘w‘) 5 #根据文件大小，偏移文件读取位置 6 file.seek(1024*1024*size)#姑且以MB为单位吧 7 #然后在当前位置写入任何内容，必须要写入，不然文件不会那么大哦 8 file.write(‘\x00‘) 9 file.close() 10 11 12 13 for i in range(100): 14 gen_file(‘E:/5m_‘+str(i+1)+‘.doc‘,5)
以上都是测试代码，项目中这么写是要挨批的。完全是为了做个笔记，免得下次又要到处找。 四、页面
这里面坑确实不少，不过我觉得主要在于pdf转换这一步：1.jodconverter-core 3.0-beta-4 这个包的maven依赖貌似下载不了2.com.artofsolving.jodconverter与org.artofsolving.jodconverter这两个包傻傻分不清3.openoffice免费的嘛，你懂得，转换效率不敢恭维，慢得很，而且并发支持并不好4.用com.artofsolving.jodconverter的话转换几十个文件，动不动就没有规律的会卡着不动，等半个小时依然没有反应，必须杀掉openoffice进程才能重来，试了很多次，org.artofsolving.jodconverter没有发现这个问题。5.多个文档转换的时候,打开openoffice服务和关闭openoffice服务都只需要调用一次。不然每次都开开关关的很无语。
时间： 2024-11-09 18:40:39