Spring Boot怎么处理上传文件时出现的MultipartException

Posted 2023-05-16

rg.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:85)
at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:76)
at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1091)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:930)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFil 参考技术A 1、文件上传大小可在js框架里就做验证了。推荐JS上传框架uploadify.js
2、既然使用了springboot，那你的文件上传的处理应该在Controller里处理。
3、如果你需要的仅仅是错误信息跳转到错误页面而不是打印堆栈信息，只需要实现一个@RequestMapping(value = "/error")的Controller实现。

Spring Boot文件上传

一、创建一个简单的包含WEB依赖的SpringBoot项目

二、配置文件上传的文件大小限制

# 上传文件总的最大值
spring.servlet.multipart.max-request-size=10MB
# 单个文件的最大值
spring.servlet.multipart.max-file-size=10MB

 

 

三、单文件上传示例

只有一个表单，选择文件，form的enctype为multipart/form-data:

file.transferTo(dest);