{"id":2367,"date":"2023-06-27T15:33:04","date_gmt":"2023-06-27T07:33:04","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2367"},"modified":"2023-06-27T15:33:04","modified_gmt":"2023-06-27T07:33:04","slug":"springboot-%e5%ae%9e%e7%8e%b0%e5%a4%a7%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%e4%b8%8b%e8%bd%bd%e3%80%81%e5%88%86%e7%89%87%e3%80%81%e6%96%ad%e7%82%b9%e7%bb%ad%e4%bc%a0","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/springboot-%e5%ae%9e%e7%8e%b0%e5%a4%a7%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%e4%b8%8b%e8%bd%bd%e3%80%81%e5%88%86%e7%89%87%e3%80%81%e6%96%ad%e7%82%b9%e7%bb%ad%e4%bc%a0\/","title":{"rendered":"SpringBoot \u5b9e\u73b0\u5927\u6587\u4ef6\u4e0a\u4f20\u4e0b\u8f7d\u3001\u5206\u7247\u3001\u65ad\u70b9\u7eed\u4f20"},"content":{"rendered":"
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\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e00\u5b89\uff0c\u4eca\u5929\u804a\u4e00\u4e0bspringboot\u5982\u4f55\u5b9e\u73b0\u5927\u6587\u4ef6\u4e0a\u4f20\u4e0b\u8f7d\u3001\u5206\u7247\u3001\u65ad\u70b9\u7eed\u4f20<\/h2>\n

\u5b9e\u73b0\u601d\u8def<\/span><\/h2>\n
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    \u5206\u7247\uff1a\u6309\u7167\u81ea\u5b9a\u4e49\u7f13\u51b2\u533a\u5927\u5c0f\uff0c\u5c06\u5927\u6587\u4ef6\u5206\u6210\u591a\u4e2a\u5c0f\u6587\u4ef6\u7247\u6bb5\u3002<\/p>\n<\/section>\n<\/li>\n

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    \u65ad\u70b9\u7eed\u4f20\uff1a\u6839\u636e\u5206\u7247\u6570\u91cf\uff0c\u7ed9\u6bcf\u4e2a\u5c0f\u6587\u4ef6\u901a\u8fc7\u5faa\u73af\u8d77\u5bf9\u5e94\u540d\u79f0\uff0c\u5f53\u6587\u4ef6\u4e0b\u8f7d\u4e2d\u65ad\u5728\u7eed\u4f20\u65f6\uff0c\u5224\u65ad\u5c0f\u6587\u4ef6\u540d\u79f0\u82e5\u5b58\u5728\u5219\u4e0d\u5b58\u4e86\uff0c\u6b64\u65f6\u8fd8\u9700\u8981\u5224\u65ad\u6587\u4ef6\u82e5\u4e0d\u662f\u6700\u540e\u4e00\u4e2a\u5206\u7247\u5219\u5927\u5c0f\u4e3a\u7f13\u51b2\u533a\u56fa\u5b9a\u5927\u5c0f\uff0c\u82e5\u6ca1\u8fbe\u5230\u5219\u8bc1\u660e\u5c0f\u6587\u4ef6\u6ca1\u4f20\u5b8c\u9700\u8981\u91cd\u65b0\u4f20\u8f93\u3002<\/p>\n<\/section>\n<\/li>\n

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    \u5408\u5e76\uff1a\u4e0b\u8f7d\u65f6\u901a\u8fc7\u7ebf\u7a0b\u6c60\u521b\u5efa\u4efb\u52a1\u8fdb\u884c\u4e0b\u8f7d\u6216\u4e0a\u4f20\u3001\u5f53\u5224\u65ad\u6700\u540e\u4e00\u4e2a\u5206\u7247\u4f20\u5b8c\u65f6\uff0c\u8c03\u7528\u5408\u5e76\u65b9\u6cd5\uff0c\u6839\u636e\u4e4b\u524d\u5b9a\u4e49\u7684\u6587\u4ef6\u540d\u79f0\u987a\u5e8f\u8fdb\u884c\u5408\u5e76\uff0c\u80af\u80fd\u51fa\u73b0\u6700\u540e\u4e00\u4e2a\u5206\u7247\u4f20\u5b8c\uff0c\u4e4b\u524d\u5206\u7247\u672a\u4f20\u5b8c\u7684\u60c5\u51b5\uff0c\u9700\u8981\u4f7f\u7528while\u5faa\u73af\u8fdb\u884c\u5224\u65ad\uff0c\u591a\u6587\u4ef6\u672a\u4f20\u8f93\u5b8c\uff0c\u5219\u7b49\u5f85\u4e00\u4f1a\u7ee7\u7eed\u5224\u65ad\u3002<\/p>\n<\/section>\n<\/li>\n

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    \u5927\u6587\u4ef6\u79d2\u4f20\uff1a\u5b9e\u9645\u4e0a\u662f\u6839\u636e\u6587\u4ef6\u540d\u79f0\u533a\u4e00\u4e2a\u552f\u4e00\u7684md5\u503c\u5b58\u50a8\uff0c\u4f20\u6587\u4ef6\u65f6\u8fdb\u884c\u5224\u65ad\uff0c\u82e5\u5b58\u5728\u5219\u4e0d\u4f20\u3002<\/p>\n<\/section>\n<\/li>\n<\/ul>\n

    <\/span>\u521b\u5efaspringboot\u9879\u76ee\uff0c\u6dfb\u52a0\u4f9d\u8d56<\/span><\/span><\/h3>\n
    <\/span>@RestController
    public class DownloadClient {
        private final static long per_page = 1024l*1024l*50l;
        \/\/\u5206\u7247\u5b58\u50a8\u4e34\u65f6\u76ee\u5f55 \u5f53\u5206\u7247\u4e0b\u8f7d\u5b8c\u540e\u5728\u76ee\u5f55\u4e2d\u627e\u5230\u6587\u4ef6\u5408\u5e76
        private final static String down_path=\"D:\\File\"<\/span>;
        \/\/\u591a\u7ebf\u7a0b\u4e0b\u8f7d
        ExecutorService pool =  Executors.newFixedThreadPool(10);
        \/\/\u6587\u4ef6\u5927\u5c0f \u5206\u7247\u6570\u91cf \u6587\u4ef6\u540d\u79f0
        \/\/\u4f7f\u7528\u63a2\u6d4b \u83b7\u53d6\u53d8\u91cf
        \/\/\u4f7f\u7528\u591a\u7ebf\u7a0b\u5206\u7247\u4e0b\u8f7d
        \/\/\u6700\u540e\u4e00\u4e2a\u5206\u7247\u4e0b\u8f7d\u5b8c \u5f00\u59cb\u5408\u5e76
        @RequestMapping(\"\/downloadFile\"<\/span>)
        public String downloadFile() throws IOException {
            FileInfo fileInfo = download(0,10,-1,null);
            if<\/span> (fileInfo!= null){
                long pages = fileInfo.fSize\/per_page;
                for<\/span> (int i = 0; i <= pages; i++) {
                    pool.submit(new Download(i*per_page,(i+1)*per_page-1,i,fileInfo.fName));
                }
            }
     
            return<\/span> \"\u6210\u529f\"<\/span>;
        }
        class Download implements Runnable{
            long start;
            long end;
            long page;
            String fName;
     
            public Download(long start, long end, long page, String fName) {
                this.start = start;
                this.end = end;
                this.page = page;
                this.fName = fName;
            }
     
            @Override
            public void run<\/span><\/span>() {
                try {
                    FileInfo fileInfo = download(start,end,page,fName);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        \/\/\u8fd4\u56de\u6587\u4ef6\u540d \u8ddf\u5927\u5c0f
        private FileInfo download(long start,long end,long page,String fName) throws IOException {
            \/\/\u65ad\u70b9\u4e0b\u8f7d \u6587\u4ef6\u5b58\u5728\u4e0d\u9700\u8981\u4e0b\u8f7d
            File file = new File(down_path, page + \"-\"<\/span> + fName);
            \/\/\u63a2\u6d4b\u5fc5\u987b\u653e\u884c \u82e5\u4e0b\u8f7d\u5206\u7247\u53ea\u4e0b\u8f7d\u4e00\u534a\u5c31\u953b\u70bc\u9700\u8981\u91cd\u65b0\u4e0b\u8f7d\u6240\u4ee5\u9700\u8981\u5224\u65ad\u6587\u4ef6\u662f\u5426\u5b8c\u6574
            if<\/span> (file.exists()&&page != -1&&file.length()==per_page){
                return<\/span> null;
            }
            \/\/\u9700\u8981\u77e5\u9053  \u5f00\u59cb-\u7ed3\u675f = \u5206\u7247\u5927\u5c0f
            HttpClient client = HttpClients.createDefault();
            \/\/httpclient\u8fdb\u884c\u8bf7\u6c42
            HttpGet httpGet = new HttpGet(\"http:\/\/127.0.0.1:8080\/down\"<\/span>);
            \/\/\u544a\u8bc9\u670d\u52a1\u7aef\u505a\u5206\u7247\u4e0b\u8f7d
            httpGet.setHeader(\"Range\"<\/span>,\"bytes=\"<\/span>+start+\"-\"<\/span>+end);
            HttpResponse response = client.execute(httpGet);
            String fSize = response.getFirstHeader(\"fSize\"<\/span>).getValue();
            fName= URLDecoder.decode(response.getFirstHeader(\"fName\"<\/span>).getValue(),\"utf-8\"<\/span>);
            HttpEntity entity = response.getEntity();\/\/\u83b7\u53d6\u6587\u4ef6\u6d41\u5bf9\u8c61
            InputStream is = entity.getContent();
            \/\/\u4e34\u65f6\u5b58\u50a8\u5206\u7247\u6587\u4ef6
            FileOutputStream fos = new FileOutputStream(file);
            byte[] buffer = new byte[1024];\/\/\u5b9a\u4e49\u7f13\u51b2\u533a
            int ch;
            while<\/span> ((ch = is.read(buffer)) != -1){
                fos.write(buffer,0,ch);
            }
            is.close();
            fos.flush();
            fos.close();
            \/\/\u5224\u65ad\u662f\u4e0d\u662f\u6700\u540e\u4e00\u4e2a\u5206\u7247
            if<\/span> (end-Long.valueOf(fSize)>0){
                \/\/\u5408\u5e76
                try {
                    mergeFile(fName,page);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            return<\/span> new FileInfo(Long.valueOf(fSize),fName);
        }
     
        private void mergeFile(String fName, long page) throws Exception {
            \/\/\u5f52\u5e76\u6587\u4ef6\u4f4d\u7f6e
            File file = new File(down_path, fName);
            BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(file));
            for<\/span> (int i = 0; i <= page; i++) {
                File tempFile = new File(down_path, i + \"-\"<\/span> + fName);
                \/\/\u5206\u7247\u6ca1\u4e0b\u8f7d\u6216\u8005\u6ca1\u4e0b\u8f7d\u5b8c\u9700\u8981\u7b49\u5f85
                while<\/span> (!file.exists()||(i!=page&&tempFile.length()<per_page)){
                    Thread.sleep(100);
                }
                byte[] bytes = FileUtils.readFileToByteArray(tempFile);
                os.write(bytes);
                os.flush();
                tempFile.delete();
            }
            File file1 = new File(down_path, -1 + \"-null\"<\/span>);
            file1.delete();
            os.flush();
            os.close();
        }
     
        \/\/\u4f7f\u7528\u5185\u90e8\u7c7b\u5b9e\u73b0
        class FileInfo{
            long fSize;
            String fName;
     
            public FileInfo(long fSize, String fName) {
                this.fSize = fSize;
                this.fName = fName;
            }
        }
    }
    <\/code><\/pre>\n

    <\/pre>\n
    \n
    \n
    \u4f5c\u8005\uff1a\u8fdc\u8d70\u4e0e\u68a6\u6e38<\/p>\n
     https:\/\/blog.csdn.net\/weixin_5221055<\/p>\n<\/blockquote>\n<\/section>\n
    \n
    \u6700\u540e\u8bf4\u4e00\u53e5\uff08\u522b\u767d\u5ad6\uff0c\u6c42\u5173\u6ce8\uff09<\/p>\n<\/blockquote>\n
    \u5982\u679c\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff0c\u6216\u8005\u6709\u6240\u542f\u53d1\u7684\u8bdd\uff0c\u5e2e\u5fd9\u70b9\u8d5e\u3001\u5728\u770b\u3001\u8f6c\u53d1\u3001\u6536\u85cf\uff0c\u4f60\u7684\u652f\u6301\u5c31\u662f\u6211\u575a\u6301\u4e0b\u53bb\u7684\u6700\u5927\u52a8\u529b\uff01
    <\/mpprofile><\/section>\n

    <\/p>\n<\/section>\n
    \n
    \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 \u4e00\u5b89\u672a\u6765              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
    \u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e00\u5b89\uff0c\u4eca\u5929\u804a\u4e00\u4e0bspringboot\u5982\u4f55\u5b9e\u73b0\u5927\u6587\u4ef6\u4e0a\u4f20\u4e0b\u8f7d\u3001\u5206\u7247\u3001\u65ad\u70b9\u7eed\u4f20 \u5b9e\u73b0\u601d\u8def \u5206\u7247\uff1a\u6309\u7167\u81ea\u5b9a\u4e49\u7f13\u51b2\u533a\u5927\u5c0f\uff0c\u5c06\u5927 …<\/p>\n","protected":false},"author":1,"featured_media":2362,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-2367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spring-boot"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664-150x150.jpeg","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152248812.png","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664-1024x435.jpeg","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152248812.png","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664-1024x435.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152247664.jpeg","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152248812.png","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152248812.png","id":"image1"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152249838.png","id":"image2"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152249838.png","id":"image3"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152249393.png","id":"image4"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/06\/20230627152249393.png","id":"image5"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"Spring Boot","post_date":"2023-06-27","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":486,"next_post_id":2603,"next_post_title":"SpringBoot bean\u81ea\u52a8\u88c5\u914d\u539f\u7406\uff0c\u8fd9\u4e00\u7bc7\u5c31\u591f\u4e86\uff01","previous_post_id":2334,"previous_post_title":"Spring Boot + Mybatis Plus + ClickHouse \u8f7b\u677e\u5b9e\u73b0\u589e\u5220\u6539\u67e5\uff0c\u770b\u4e86\u5fc5\u61c2\uff01","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/2367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2367"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/2367\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/2362"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}