{"id":162899,"date":"2020-10-02T09:45:43","date_gmt":"2020-10-02T01:45:43","guid":{"rendered":"http:\/\/4563.org\/?p=162899"},"modified":"2020-10-02T09:45:43","modified_gmt":"2020-10-02T01:45:43","slug":"springboot-%e6%8e%a5%e5%8f%a3%e6%80%8e%e4%b9%88%e4%bc%a0%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e7%9a%84-blob-%e5%9b%be%e7%89%87%e7%bb%99%e5%89%8d%e7%ab%af","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=162899","title":{"rendered":"SpringBoot \u63a5\u53e3\u600e\u4e48\u4f20\u6570\u636e\u5e93\u4e2d\u7684 BLOB \u56fe\u7247\u7ed9\u524d\u7aef"},"content":{"rendered":"
\n
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\n

SpringBoot \u63a5\u53e3\u600e\u4e48\u4f20\u6570\u636e\u5e93\u4e2d\u7684 BLOB \u56fe\u7247\u7ed9\u524d\u7aef <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : sandman511 <\/span> <\/i> 9<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5355\u5f20\u6216\u8005\u591a\u5f20\u7684 \u6c42\u5927\u4f6c\u8bb2\u4e2a\u65b9\u6848 \u73b0\u5728\u662f\u80fd\u4f20 \u4f46\u60f3\u8981\u4e2a\u6700\u4f73\u65b9\u6848\u3002\u3002\u867d\u7136\u6570\u636e\u5e93\u5b58\u56fe\u7247\u5c31\u79bb\u8c31\u3002\u3002\u3002\u3002<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (26<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : RedBeanIce <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90fd springboot \u4e86\uff0c\u6570\u636e\u5e93\u8fd8\u5b58\u56fe\u7247\u7684\u4e8c\u8fdb\u5236\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : myCupOfTea <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6570\u636e\u5e93\u5b58\u56fe\u7247\u786e\u5b9e\u79bb\u8c31 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \n
    \u8cc7\u6df1\u5927\u4f6c : muskill <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5b58 base64 \u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lower <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u73b0\u5728\u7684\u65b9\u6848\u662f\u4ec0\u4e48\u6837\u7684\u5462\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : napsterwu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    blob \u76f4\u63a5\u5f53\u6210\u6587\u4ef6\u4e0b\u8f7d\u9001\u51fa\u53bb\uff0c\u524d\u7aef\u76f4\u63a5\u7528 img src \u62ff <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : monkeyWie <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u63d0\u4f9b\u4e00\u4e2a\u63a5\u53e3\uff0c\u7136\u540e\u4ee5\u5b57\u8282\u6d41\u7684\u65b9\u5f0f\u5199\u51fa\u56fe\u7247\u4e0d\u5c31\u884c\u4e86\u5417\uff0c\u6ce8\u610f\u8bbe\u7f6e\u597d\u6b63\u786e\u7684 Content-Type \u5c31\u884c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : yazinnnn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf4\u5b9e\u8bdd,\u6570\u636e\u5e93\u5b58\u56fe\u7247\u633a\u626f\u6de1\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : fhsan <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    http body stream <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : charten <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6211\u4ece\u524d\u7aef\u7684\u89d2\u5ea6\u8c08\u4e00\u4e0b\uff0c\u6211\u4eec\u8fd9\u8fb9\u8bf7\u6c42 blob \u5b9e\u9645\u4e0a\u5c31\u662f\u8bf7\u6c42\u4e8c\u8fdb\u5236\u6d41\uff0c\u8ddf\u666e\u901a\u7684\u8bf7\u6c42\u6ca1\u4ec0\u4e48\u533a\u522b\u3002\u4f60\u53ea\u8981\u628a\u56fe\u7247\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u653e\u8fdb body \u5c31\u53ef\u4ee5\u4e86\u3002\u53e6\u5916\uff0c\u5982\u679c\u6709\u8bf7\u6c42\u591a\u5f20\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u8ddf\u524d\u7aef\u7ea6\u5b9a\u597d\u4e00\u4e2a\u4e8c\u8fdb\u5236\u683c\u5f0f\uff0c\u6bd4\u5982\u4ee5\u67d0\u4e2a\u5b57\u7b26\uff0c\u6bd4\u5982 0x3b \u4e4b\u7c7b\u7684\u4f5c\u4e3a\u6587\u4ef6\u7684\u5f00\u5934\uff0c\u540e\u9762\u52a0 4 \u4e2a\u5b57\u8282\u7528\u4e8e\u8868\u793a\u56fe\u7247\u7684\u4e8c\u8fdb\u5236\u957f\u5ea6\uff1a
    0x3b 0x00 0x00 0x11 0xff <\u56fe\u7247\u6570\u636e….4607 \u4e2a\u5b57\u8282>
    0x3b 0x00 0x00 0x22 0xff <\u56fe\u7247\u6570\u636e…8959 \u4e2a\u5b57\u8282>
    … <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : securityCoding <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e0d\u8981\u5728\u9519\u8bef\u7684\u8def\u4e0a\u8d8a\u8d70\u8d8a\u8fdc , \u6389\u5934\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : wysnylc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8c03\u5934,OSS <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : justlikemaki <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u654f\u611f\u56fe\u7247\u4f60\u4eec\u4e5f\u5b58 oss \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : crclz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @GetMapping(“{id}”)
    public ResponseEntity<byte[]> getFile(@PathVariable long id) {
    var blob = blobRepository.findById(id).orElse(null);
    return ResponseEntity.ok()
    .contentType(MediaType.IMAGE_JPEG)
    .body(blob.getData());
    } <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : spacebound <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @monkeyWie +1\uff0c\u524d\u7aef\u76f4\u63a5\u4e0d\u7528\u5904\u7406\uff0c\u8c03\u63a5\u53e3\u5c31\u884c\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 0x666666 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90fd 0202 \u5e74\u4e86\uff0c\u5fae\u670d\u52a1\u90fd\u7528\u4e0a\u4e86\uff0c\u6570\u636e\u5e93\u8fd8\u5b58\u56fe\u7247\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tanranran <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    base64 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : radiocontroller <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e13\u4e1a\u7684\u4e8b\u4ea4\u7ed9\u4e13\u4e1a\u7684\u670d\u52a1 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ztechstack <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    InputStreamResource resource = new InputStreamResource(gridFSDBFile.getInputStream(),
    gridFSDBFile.getFilename());<\/p>\n

    return (ResponseEntity<Resource>) ResponseEntity
    .ok()
    .header(HttpHeaders.CONTENT_DISPOSITION, “attachment; filename=”” + gridFSDBFile.getFilename() + “””)
    .contentLength(gridFSDBFile.getLength())
    .contentType(MediaType.APPLICATION_OCTET_STREAM)
    .body(resource); <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ztechstack <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5982\u679c\u662f byte[], \u53ef\u4ee5\u4f7f\u7528 ByteArrayResource <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zjsxwc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd8\u4e0d\u5982\u56fe\u7247\u52a0\u5bc6\u540e\u6587\u4ef6\u4fdd\u5b58\u672c\u5730\uff0cmysql \u5b58\u56fe\u7247\u89e3\u5bc6\u5bc6\u7801\uff0c\u9700\u8981\u7684\u65f6\u5019\u901a\u8fc7\u5bc6\u7801\u548c\u52a0\u5bc6\u540e\u7684\u6587\u4ef6\u5f97\u5230\u539f\u56fe\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hejingyuan199 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u867d\u7136\u6211\u4e0d\u77e5\u9053\u5982\u4f55\u56de\u7b54\u3002
    \u4f46\u6211\u60f3\u9644\u548c\u4e00\u4e0b\uff0c\u6211\u4e5f\u662f\u628a\u56fe\u7247\u5b58\u6570\u636e\u5e93\u7684\u3002<\/p>\n

    \u6211\u73b0\u5728\u7684\u9879\u76ee\u662f\u4e2a\u6d4b\u8bd5\u6027\u9879\u76ee\uff0c\u4e0d\u662f\u6b63\u89c4\u4f7f\u7528\u3002
    \u6211\u4eec\u7684\u6570\u636e\u5e93\u4f9b\u6240\u6709\u5f00\u53d1\u4eba\u5458\u540c\u65f6\u4f7f\u7528\u7684\u3002<\/p>\n

    \u4e0d\u540c\u7684\u5f00\u53d1\u4eba\u5458\u6709\u4e0d\u540c\u7684\u529f\u80fd\uff0c\u529f\u80fd\u4e92\u4e0d\u5e72\u6d89\uff0c\u4f46\u662f\u5171\u7528\u4e00\u4e2a\u6570\u636e\u5e93\u548c\u8868\u3002
    \u5982\u679c\u56fe\u7247\u5b58\u5728\u670d\u52a1\u5668\u672c\u5730\uff0c\u6570\u636e\u5e93\u53ea\u5b58\u56fe\u7247\u540d\u79f0\uff0c\u90a3\u5927\u5bb6\u5404\u81ea\u5728\u6d4b\u8bd5\u65f6\u90fd\u62ff\u4e0d\u5230\u56fe\u7247\u3002
    \u6240\u4ee5\u6211\u628a\u56fe\u7247\u8f6c\u6210 Base64 \u5b57\u7b26\u4e32\u5b58\u8fdb\u6570\u636e\u5e93\u4e86\u3002
    \u8fd8\u6709\u7684\u8868\u91cc\u5b58\u7740 Blob \u7c7b\u578b\u7684\u7528\u6237\u4e0a\u4f20\u7684\u9644\u4ef6\uff08\u6587\u4ef6\u6216\u56fe\u7247\uff09\u3002<\/p>\n

    \u4e00\u76f4\u770b\u5230\u5927\u5bb6\u8bf4\u5927\u6587\u4ef6\u4e0d\u5e94\u8be5\u5b58\u6570\u636e\u5e93\uff0c
    \u4e5f\u8bb8\u672a\u6765\u8f6c\u4e3a\u751f\u4ea7\u73af\u5883\u65f6\u5019\u518d\u6539\u5427\u3002<\/p>\n

    \u5982\u679c\u6570\u636e\u5e93\u5b58\u7740 Base64 \u5b57\u7b26\u4e32\uff0c\u5f80\u524d\u7aef\u53d1\u9001\u5e94\u8be5\u6bd4\u8f83\u7b80\u5355\u4e86\u5427\u3002
    Blob \u6211\u770b\u5230\u6211\u4eec\u7684\u8fd9\u8fb9\u7528\u7684\u662f\uff0c
    (\u4ee3\u7801\u98ce\u683c\u5f88\u6e23\uff0c\u968f\u4fbf\u63a5\u53d7 Critics \uff09<\/p>\n

    \/***** Student Chose One Application*****\/
    @RequestMapping(value=”\/history\/{ticketNum}”, method=RequestMethod.GET)
    public String historyApplication(@PathVariable String ticketNum, Model model, HttpServletRequest request) {
    String search = (String) request.getSession().getAttribute(“searchTicketNum”);
    Optional<Application> app = applicationService.findApplication(ticketNum);
    if (app.isPresent()) {
    model.addAttribute(“applicationObj”, app.get());
    Optional<User> user = AIBTuserdetailsService.findByUserName(app.get().getCreatedBy());
    model.addAttribute(“userObj”,user.get());
    model.addAttribute(“urlTicketNum”, ticketNum);<\/p>\n

    model.addAttribute(“documents”, applicationService.getDocumentUrl(ticketNum, app.get().getId()));
    ————————————————————————————————–
    \/\/\u8c03\u7528 blob \u7c7b\u578b\u7684\u6587\u4ef6<\/p>\n

    model.addAttribute(“logs”, applicationService.getAuditLog(app.get().getId()));
    \/\/Optional<Course> course = courseService.findByCourseid(user.get().getCurrentCourseCode());
    \/\/if(course.isPresent()) {
    \/\/ model.addAttribute(“course”, course.get().getCourseName());}
    \/\/else {
    \/\/ model.addAttribute(“course”, “Not found”);
    \/\/}
    }
    model.addAttribute(“applicationList”, applicationService.findApplications(search));
    return “student\/history”;
    }<\/p>\n

    In ApplicationService.java<\/p>\n

    public Map<String, String> getDocumentUrl(String ticketNum, int applicationId) {
    Map<String, String> result = new HashMap<>();
    for (String fileName : documentRepository.findAllFileNameByApplicationId(applicationId)) {
    ———————————————————————————
    \/\/get document out from Database<\/p>\n

    if (!fileName.isEmpty()) {
    try {
    result.put(fileName, ticketNum + “\/” + URLEncoder.encode(fileName, String.valueOf(StandardCharsets.UTF_8)));
    } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
    }
    }
    }
    if (result.isEmpty()) {
    return null;
    } else {
    return result;
    }
    }<\/p>\n

    In DocumentRepository.java<\/p>\n

    public interface DocumentRepository extends JpaRepository<Document, Integer> {
    Optional<Document> findByFileNameAndApplicationId(String fileName, int applicationId);
    @Query(value=”select file_name from document where application_id =:application_id”, nativeQuery=true)
    List<String> findAllFileNameByApplicationId(@Param(“application_id”) int applicationId);
    }<\/p>\n

    \/\/This is parts of Class Document<\/p>\n

    @Entity
    @Table(name = “Document”)
    public class Document {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private int applicationId;
    private String fileName;
    private String fileType;
    @Lob
    private byte[] data;
    …
    }<\/p>\n

    \u4ec5\u4f9b\u53c2\u8003
    \u8fd9\u4e2a\u6d41\u7a0b\u4f3c\u4e4e\u5c31\u662f\u524d\u9762\u4e00\u4e9b V \u53cb\u8bf4\u7684\u4ee5\u6587\u4ef6\u4e0b\u8f7d\u65b9\u5f0f\u4f20\u5230\u524d\u7aef\u7684\u3002<\/p>\n

    \u524d\u7aef\u662f\u8fd9\u6837\u7684\uff1a
    <div class=”three”>
    <p>
    <b>Attachment:<\/b>
    <\/p>
    <div class=”links”>
    <a target=”_blank” th:each=”element : ${documents}”
    th:href=”@{\/student\/downloadFile\/{url}(url=${element.value})}”><img th:src=”@{\/image\/qubiezhen.png}”>[[${element.key}]]<\/a>
    <\/div>
    <\/div> <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hejingyuan199 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @hejingyuan199 <\/p>\n

    \u8865\u4e0a\u6700\u5173\u952e\u7684\u6570\u636e\u4f20\u8f93<\/p>\n

    @RequestMapping(value=”\/downloadFile\/{ticketNum}\/{fileName}”, method=RequestMethod.GET)
    public ResponseEntity<Resource> downloadFile(@PathVariable String ticketNum, @PathVariable String fileName) {
    \/\/ Load file from database
    Optional<Document> doc = applicationService.getDocument(ticketNum, fileName, Boolean.FALSE);<\/p>\n

    if (doc.isPresent()) {
    return ResponseEntity.ok()
    .contentType(MediaType.parseMediaType(doc.get().getFileType()))
    .header(HttpHeaders.CONTENT_DISPOSITION, “attachment; filename=”” + doc.get().getFileName() + “””)
    .body(new ByteArrayResource(doc.get().getData()));
    } else {
    return new ResponseEntity<>(HttpStatus.NOT_FOUND);
    }
    } <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : bxd5812127 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u540e\u7aef\u7ed9\u524d\u7aef\u63d0\u4f9b\u4e24\u4e2a\u63a5\u53e3\uff0c\u4e00\u4e2a\u62ff\u6240\u6709\u56fe\u7247\u7684 id\uff0c\u4e00\u4e2a\u6839\u636e id \u62ff\u4e00\u4e2a\u56fe\u7247\uff0c\u524d\u7aef\u6839\u636e id \u6392\u961f\u62ff\u56fe\u7247\u6709\u6ca1\u6709\u641e\u5934\uff0c\u62ff\u5b8c\u4e00\u4e2a\u5728\u62ff\u4e00\u4e2a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : THESDZ <\/span> <\/div>\n
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  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : hyperbin <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @charten \u600e\u4e48\u4fdd\u8bc1\u56fe\u7247\u91cc\u6ca1\u6709 0x3b \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : charten <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
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  • \n","protected":false},"excerpt":{"rendered":"

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