两种方法都可以：例子：在tomcat里添加MIME类型，application/wasm

1.

import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.server.MimeMappings;
import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TomcatConfig {
@Bean
public ConfigurableServletWebServerFactory configurableServletWebServerFactory() {
TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();

    MimeMappings mappings = new MimeMappings(MimeMappings.DEFAULT);  
            mappings.add("wasm", "application/wasm");  
            tomcat.setMimeMappings(mappings);

    return tomcat;  
}  

}

2.

import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.server.MimeMappings;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.stereotype.Component;

@Component
public class ServletCustomizer implements WebServerFactoryCustomizer {
@Override
public void customize(TomcatServletWebServerFactory factory) {
MimeMappings mappings = new MimeMappings(MimeMappings.DEFAULT);
mappings.add("wasm", "application/wasm");
factory.setMimeMappings(mappings);
}
}