Increase HTTP Post maxPostSize in Spring Boot

In application.properties file write this:

# Max file size.spring.http.multipart.max-file-size=1Mb# Max request size.spring.http.multipart.max-request-size=10Mb

Adjust size according to your need.

Update

Note: As of Spring Boot 2, however you can now do

# Max file size.spring.servlet.multipart.max-file-size=1MB# Max request size.spring.servlet.multipart.max-request-size=10MB

Appendix A. Common application properties - Spring

Found a solution. Add this code to the same class running SpringApplication.run.

// Set maxPostSize of embedded tomcat server to 10 megabytes (default is 2 MB, not large enough to support file uploads > 1.5 MB)@BeanEmbeddedServletContainerCustomizer containerCustomizer() throws Exception {    return (ConfigurableEmbeddedServletContainer container) -> {        if (container instanceof TomcatEmbeddedServletContainerFactory) {            TomcatEmbeddedServletContainerFactory tomcat = (TomcatEmbeddedServletContainerFactory) container;            tomcat.addConnectorCustomizers(                (connector) -> {                    connector.setMaxPostSize(10000000); // 10 MB                }            );        }    };}

Edit: Apparently adding this to your application.properties file will also increase the maxPostSize, but I haven't tried it myself so I can't confirm.

multipart.maxFileSize=10Mb # Max file size.multipart.maxRequestSize=10Mb # Max request size.

If you are using using x-www-form-urlencoded mediatype in your POST requests (as I do), the multipart property of spring-boot does not work. If your spring-boot application is also starting a tomcat, you need to set the following property in your application.properties file:

# Setting max size of post requests to 6MB (default: 2MB)server.tomcat.max-http-post-size=6291456

I could not find that information anywhere in the spring-boot documentations. Hope it helps anybody who also sticks with x-www-form-urlencoded encoding of the body.