How to configure the temporary file storage directory in springboot

springboot temporary file storage directory configuration

Scenario:

The upload file function reports an error, and then check the log.

Error log:

The temporary upload location [/tmp/tomcat.7957874575370093230.8088/work/Tomcat/localhost/ROOT] is not valid

Cause:

In the Linux system, when the springboot application service is restarted (the java -jar command starts the service), a tomcat* file will be generated in the /tmp directory of the operating system. Directory, the uploaded files must first be converted into temporary files and saved under this folder.

Because the files in the temporary /tmp directory are not used for a long time (10 days), they will be automatically deleted by the system mechanism. Therefore, if the system has not used the temporary folder for a long time, it may cause the above problem.

Solution:

1. Create a temporary folder:

mkdir -p /tmp/tomcat.7957874575370093230.8088/work/Tomcat/localhost/ROOT

This may happen again later

2. Reconfigure application.properties A file directory, and then restart the project

# 存放Tomcat的日志、Dump等文件的临时文件夹，默认为系统的tmp文件夹
server.tomcat.basedir=/data/apps/temp

3. Configuration class configuration temporary file storage directory

@Bean
    MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        factory.setLocation(tmepPath);
        return factory.createMultipartConfig();
    }

Springboot modifies the storage location of temporary files

Error reporting

After the project has been running online for a period of time, the following exception is thrown when uploading files:

The temporary upload location [/tmp/tomcat.*.80/work/Tomcat/localhost/ROOT] is not valid

After searching, the following solution was adopted [Modify the location of the temporary file]

Add to the application.yml file

location:
  tempDir: /opt/location/tempDir #此处为*unix的系统相关位置

Add the configuration class to the project

@Configuration
public class MultipartConfig {
   @Value("${location.tempDir:/opt/tempDir}")
   private String tempDir;

   @Bean
   MultipartConfigElement multipartConfigElement() {
      MultipartConfigFactory factory = new MultipartConfigFactory();
      File tmpDirFile = new File(tempDir);
      // 判断文件夹是否存在
      if (!tmpDirFile.exists()) {
         tmpDirFile.mkdirs();
      }
      factory.setLocation(tempDir);
      return factory.createMultipartConfig();
   }
}

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