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字段类型为“文件”的表单由于“ MultipartException：当前请求不是多部分请求”而未提交给服务器

Kleber Mota 发表于 Dev
9
克莱伯·莫塔（Kleber Mota）

在我当前的spring-boot项目中，我的主Application类中具有MultipartFile的此配置：

  @Bean
  MultipartConfigElement multipartConfigElement() {
    MultipartConfigFactory factory = new MultipartConfigFactory();
    factory.setMaxFileSize("128KB");
    factory.setMaxRequestSize("128KB");
    return factory.createMultipartConfig();
  }

我的表格具有以下格式：

<form role="form" class="form" action="/Categoria/cadastra" method="post" enctype="multipart/form-data">
...
</form>

在我的控制器中，此请求的处理程序是以下方法：

  @RequestMapping(value = "cadastra", method=RequestMethod.POST)
  @ResponseBody
  public void cadastra(@ModelAttribute("object") E object, BindingResult result, @RequestParam(value="icone", required=false) MultipartFile icone, @RequestParam(value="fotos", required=false) MultipartFile fotos[]) {
    ...
  }

但是当我尝试从表单提交数据时，出现此错误：

MultipartException: The current request is not a multipart request
org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.assertIsMultipartRequest(RequestParamMethodArgumentResolver.java:216)
org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.resolveName(RequestParamMethodArgumentResolver.java:167)
org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:89)
org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1736)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1695)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)

有人可以告诉我如何解决吗？

更新

我尝试了这种其他方式：

Application.java：

@EnableAutoConfiguration
@Configuration
@ComponentScan
public class Application {
  public static void main(String[] args) throws Throwable {
    SpringApplication.run(Application.class, args);
  }
}

application.properties：

# Multipart configuration
multipart.fileSizeThreshold = 131072
multipart.location = ${user.home}/.mystore/uploads
multipart.maxFileSize = -1
multipart.maxRequestSize = -1

这也不行。任何人都有关于此代码有什么问题的有用提示？

更新2

我没有这个问题，但是当我检查浏览器的网络控制台工具时，我注意到没有一个input[type=file]字段被列为请求的参数，尽管事实上它们都应该存在（所有属性都具有name在上面）。

更新3

我尝试使用外部库jquery.form解决此问题，将代码更改为此：

$("form.form").ajaxForm(function(data){
    if(data == "") {
        $("#yes").show();
    } else {
        var $temp  = $('<div/>', {html:data});
        $("#not").find(".text").empty();
        $("#not").find(".text").html( $temp.remove('head').html() );
        $("#not").show();
    }
});

它可以工作，但是现在我正在寻找不需要在项目中添加额外的jquery lib的解决方案。

耶万·帕蒂尔（Jeevan Patil）

我猜application.properties配置有问题。您已将maxFileSize和设置maxRequestSize为-1。我不确定这是否正确。

阅读本指南页面，以了解如何在Spring Boot应用程序中完成文件上传。

更新：如果您的表单包含file内容并且textfields要提交到服务器端，则应创建一个具有与表单元素相同名称的属性的域类。并将完整的表单提交给服务器端，获取中的所有表单数据@ModelAttribute。现在ModelAttribute将同时具有文件和文本字段。示例代码供您参考：

以下是DTO携带表单数据的类：

public class PartDetailsDto {
    private String PartId;
    private MultipartFile productImage;
    private MultipartFile approvalLetter;
}

以下是Controller方法：

@RequestMapping(value = "parts/create", method = RequestMethod.POST)
public String createPart(@ModelAttribute("partInfo") PartDetailsDto partDetails) {
    // Here in partDetails you will get form data
}

JSP格式如下所示：

<form autocomplete="off" action="${pageContext.request.contextPath}/parts/create" method="POST" name="partInfo" enctype="multipart/form-data">
    // here you will have text fields and file content
</form>

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