springboot 高效GZIP

在Spring Boot中实现高效的GZIP压缩可以通过配置来实现。下面是一个示例：

1. 在`application.properties`或`application.yml`文件中添加以下配置：

server.compression.enabled=true
server.compression.mime-types=application/json,application/xml,text/html,text/css,text/javascript,application/javascript

2. 在启动类中添加`@EnableCompression`注解：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.filter.ShallowEtagHeaderFilter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.DispatcherType;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.util.EnumSet;

@SpringBootApplication
@EnableWebMvc
public class BootDemoApplication implements WebMvcConfigurer, ServletContextInitializer {

    public static void main(String[] args) {
        SpringApplication.run(BootDemoApplication.class, args);
    }

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD);
        FilterRegistrationBean<CharacterEncodingFilter> characterEncodingFilter = new FilterRegistrationBean<>();
        characterEncodingFilter.setFilter(new CharacterEncodingFilter());
        characterEncodingFilter.addInitParameter("encoding", "UTF-8");
        characterEncodingFilter.addInitParameter("forceEncoding", "true");
        characterEncodingFilter.setDispatcherTypes(dispatcherTypes);
        characterEncodingFilter.addUrlPatterns("/*");

        FilterRegistrationBean<ShallowEtagHeaderFilter> shallowEtagHeaderFilter = new FilterRegistrationBean<>();
        shallowEtagHeaderFilter.setFilter(new ShallowEtagHeaderFilter());
        shallowEtagHeaderFilter.setDispatcherTypes(dispatcherTypes);
        shallowEtagHeaderFilter.addUrlPatterns("/*");

        servletContext.addFilter("characterEncodingFilter", characterEncodingFilter.getFilter()).addMappingForUrlPatterns(dispatcherTypes, true, "/*");
        servletContext.addFilter("shallowEtagHeaderFilter", shallowEtagHeaderFilter.getFilter()).addMappingForUrlPatterns(dispatcherTypes, true, "/*");
    }

    @Bean
    public FilterRegistrationBean<GzipFilter> gzipFilter() {
        FilterRegistrationBean<GzipFilter> registrationBean = new FilterRegistrationBean<>();
        registrationBean.setFilter(new GzipFilter());
        registrationBean.addUrlPatterns("/*");
        return registrationBean;
    }
}

请注意，上述示例中的`GzipFilter`是自定义的GZIP过滤器，你需要根据自己的需求实现该过滤器。