Tidak dapat memuat naik imej dalam aplikasi Spring Boot

Mengalami masalah memuat naik imej dalam aplikasi Spring Boot anda? jangan risau! Editor PHP Baicao memberi anda penyelesaian. Tidak kira apa kesukaran yang anda hadapi memuat naik imej, anda akan temui jawapannya di sini. Teruskan membaca Soal Jawab java kami untuk mengetahui cara berjaya memuat naik imej dalam aplikasi Spring Boot. Mari kita selesaikan masalah ini bersama-sama!

Kandungan soalan

Saya membangunkan aplikasi springboot menggunakan react sebagai bahagian hadapan untuk memuat naik imej ke dalam folder.

@postmapping(value = "/upload")
public responseentity<?> uploadimage(@requestparam("user") string user, @requestparam("image") multipartfile file) {
    try {
        system.out.println("-------------------------------------------------------------------");
        this.process(ioutils.tobytearray(file.getinputstream()), user, file.getoriginalfilename().substring(file.getoriginalfilename().lastindexof(".")));
    } catch (ioexception e) {
        // todo auto-generated catch block
        e.printstacktrace();
    }
    return new responseentity<>("uploaded", httpstatus.ok);//userservice.uploadimagefile(user, file);
}


@async
public void process(byte[] bs, string user, string ext) throws ioexception {

    string fname = user.substring(0, user.lastindexof("@")).concat(ext);
    // full path
    string filepath = path + file.separator + fname;

    system.out.println(fname + " and " + filepath);

    file f = new file(path);
    if (!f.exists()) {
        f.mkdir();
    }

    file convertedfile = new file(filepath);

    fileoutputstream fos = new fileoutputstream(convertedfile);
    system.out.println("-----started------");
    
    fos.write(bs);
    fos.close();
    system.out.println("-----closed------");
}

Saya cuba memuat naik imej ke dalam folder. Apabila memuat naik fail tersegmen imej ke folder menggunakan file.getinputstream, saya mendapat ralat berikut

org.springframework.web.multipart.support.StandardServletMultipartResolver[0;39m: Failed to perform cleanup of multipart items
java.io.UncheckedIOException: Cannot delete D:\JS Projects\myapp\BackEnd\UserLoginSignUp\images\work\Tomcat-2\localhost\ROOT\upload_d31827cc_51e6_4901_b60e_6afdd0ee8a99_00000004.tmp
at org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.delete(DiskFileItem.java:431)
at org.apache.catalina.core.ApplicationPart.delete(ApplicationPart.java:53)
at org.springframework.web.multipart.support.StandardServletMultipartResolver.cleanupMultipart(StandardServletMultipartResolver.java:134)
at org.springframework.web.servlet.DispatcherServlet.cleanupMultipart(DispatcherServlet.java:1251)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1108)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:555)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:390)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:926)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:833)

Apakah kemungkinan sebab ralat dan pengecualian di atas? Bagaimana kita menyelesaikan masalah di atas?

Penyelesaian

Pertimbangkan untuk menggunakan files.copy(), ia akan menjimatkan banyak kerja anda.

public void saveFile(String directory, MultipartFile file) {
    if (file.isEmpty()) {
        return;
    }

    String fileName = file.getOriginalFilename();
    if (Objects.isNull(fileName) || fileName.isEmpty()) {
        fileName = UUID.randomUUID().toString();
    }
    try {
        Path path = Paths.get(directory);
        Files.copy(file.getInputStream(), path.resolve(fileName));
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Atas ialah kandungan terperinci Tidak dapat memuat naik imej dalam aplikasi Spring Boot. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!