SpringBoot打成jar包部署，遇到：The temporary upload location is not valid问题

springboot开发，部署服务器，遇到以下报错：

org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException:   
The temporary upload location [/tmp/tomcat.2090842327674075737.8081/work/Tomcat/localhost/ROOT] is not valid  
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.handleParseFailure(StandardMultipartHttpServletRequest.java:120) ~  
    [spring-web-5.0.4.RELEASE.jar!/:5.0.4.RELEASE]  

　　

解决：

在application.yml或application.properties中添加如下配置：

server:

  port: 5555

  servlet:

      context-path: /xxxx

 #这段配置

  tomcat:

      remote-ip-header: x-forward-for

      uri-encoding: UTF-8

      max-threads: 1000

      max-http-header-size: 8096

      #核心代码，设置tomcat的basedir

      basedir: ${user.home}/tomcat/tmp

关于basedir，源码是这么解释的，Tomcat base directory. If not specified, a temporary directory is used.，也就是tomcat基础目录，如果没有指定，就用临时目录。

加上这段tomcat的配置，到目前为止，在未出现这个错误。

方法来源：https://blog.csdn.net/moshowgame/article/details/82622546