xhr.open('POST', '#(local)/upload?token='+token, true);

    that = this;

    xhr.onreadystatechange = function () {

      if (xhr.readyState === 4 && xhr.status === 200) {

        var response = JSON.parse(xhr.responseText);

        that.dockeys.push(response);

        options.onSuccess();

      }else{

    options.onFailure();

      }

    };

    const formData = new FormData();

    formData.append('file', options.sourceFile);

    formData.append("enctype", 'multipart/form-data');

   xhr.send(formData);

后端

UploadFile uploadFile = getFile("file");

用pc浏览器上传文件正常的，但是在手机端上传就会报错，求大佬指导

java.lang.RuntimeException: java.io.IOException: Corrupt form data: premature ending

at com.jfinal.upload.MultipartRequest.wrapMultipartRequest(MultipartRequest.java:140)

at com.jfinal.upload.MultipartRequest.<init>(MultipartRequest.java:82)

at com.jfinal.core.Controller.getFiles(Controller.java:894)

at com.jfinal.core.Controller.getFile(Controller.java:904)

at com.demo.index.IndexController.upload(IndexController.java:84)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.jfinal.aop.Invocation.invoke(Invocation.java:97)

at com.jfinal.core.ActionHandler.handle(ActionHandler.java:110)

at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:90)

at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:67)

at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)

at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)

at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)

at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)

at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)

at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)

at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)

at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)

at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)

at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)

at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)

at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)

at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)

at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

at io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)

at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)

at io.undertow.servlet.handlers.SessionRestoringHandler.handleRequest(SessionRestoringHandler.java:119)

at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:275)

at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:79)

at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:134)

at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:131)

at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)

at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)

at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:255)

at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:79)

at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:100)

at io.undertow.server.Connectors.executeRootHandler(Connectors.java:393)

at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:852)

at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)

at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2019)

at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1558)

at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1449)

at org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1282)

at java.lang.Thread.run(Thread.java:748)