Spring Boot 内嵌 Web 容器介绍及常见运行参数

Spring Boot 支持的内嵌容器有 Tomcat（默认） 、Jetty 、Undertow 和 Reactor Netty （v2.0+）, 借助可插拔(SPI)机制的实现，开发者可以轻松进行容器间的切换。

 
        
            org.springframework.boot
            spring-boot-starter-web
            
            
                
                    org.springframework.boot
                    spring-boot-starter-tomcat
                
            
        
        
        
            org.springframework.boot
            spring-boot-starter-jetty
        
        
    

Spring Boot 配置有很多，具体可以参考这里。下面列出一些常见的、与容器相关的配置：

• 地址：

server.port=8080 # Server HTTP port.
server.address= # Network address to which the server should bind.

• 压缩：

server.compression.enabled=false # Whether response compression is enabled.
server.compression.excluded-user-agents= # Comma-separated list of user agents for which responses should not be compressed.
server.compression.mime-types=text/html,text/xml,text/plain,text/css,text/javascript,application/javascript,application/json,application/xml # Comma-separated list of MIME types that should be compressed.
server.compression.min-response-size=2KB # Minimum "Content-Length" value that is required for compression to be performed.

• 错误：

server.error.include-exception=false # Include the "exception" attribute.
server.error.include-stacktrace=never # When to include a "stacktrace" attribute.
server.error.path=/error # Path of the error controller.
server.error.whitelabel.enabled=true # Whether to enable the default error page displayed in browsers in case of a server error.

• 其他：

server.connection-timeout= # Time that connectors wait for another HTTP request before closing the connection. When not set, the connector's container-specific default is used. Use a value of -1 to indicate no (that is, an infinite) timeout.
server.http2.enabled=false # Whether to enable HTTP/2 support, if the current environment supports it.
server.max-http-header-size=8KB # Maximum size of the HTTP message header.

我们还可以借助编程的方式来修改这些配置项，即通过实现 WebServerFactoryCustomizer 接口方法：

• 压缩配置

@SpringBootApplication
public class SpringBootConfigurationApplication implements WebServerFactoryCustomizer {

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

    @Override
    public void customize(JettyServletWebServerFactory factory) {
        Compression compression = new Compression();
        compression.setEnabled(true);
        compression.setMinResponseSize(DataSize.ofBytes(512));
        factory.setCompression(compression);
    }
}

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