Springboot own tomcat configuration in different ways

In the previous chapters, there are already configuration instructions for setting up Tomcat, and this section focuses on the next 3 Tomcat settings, each of which is somewhat differentiated.
1, directly in the Application.properties configuration, the following content from the official website description ( Part X. Appendices): server.address = # Network address to which the server should bind to. server.compression.enabled =false # If response compression is enabled. server.compression.excluded-user-agents = # List of user-agents to exclude from compression. server.compression.mime-types = # comma-separated List of MIME types that should be compressed. For instance ' Text/html,text/css,application/json ' server.compression.min-response-size = # Minimum Response size that is required for compression to be performed. For instance 2048 server.connection-timeout = # time in milliseconds that connectors would wait for another HTTP request is Fore closing the connection. When not set, the connector ' s container-specific default would be used. Use a value of-1 to indicate no (i.e. infinite) timeout. server.context-parameters.* = # Servlet Context init parameters. For instance ' Server.context-parameters.a=alpha ' Server.context-path = # context Path of the the application. Server.display-name =application # Display Name of The application. Server.max-http-header-size =0 # Maximum size in bytes of the HTTP message header. Server.max-http-post-size =0 # Maximum size in bytes of the HTTP post content. 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 # Enable The default error page displayed in browsers in case of a server error. Server.jetty.acceptors = # Number of acceptor threads to use. Server.jetty.selectors = # Number of selector threads to use. Server.jsp-servlet.class-name =org.apache.jasper.servlet.jspservlet # The class name of the JSP servlet. server.jsp-servlet.init-parameters.* = # init parameters used to configure the JSP servlet server.jsp-servlet.registered = True # Whether or not, the JSP servlet is registered server.port =8080 # server HTTP port. Server.server-header = # Value to use for the server response header (no header is sent if empty) Server.servlet-path =/# Path of the main dispatcher servlet. server.use-forward-headers = # If x-forwarded-* headers should is applied to the HttpRequest. server.session.cookie.comment = # Comment for the session cookie. Server.session.cookie.domain = # domain for the session cookie. server.session.cookie.http-only = # "HttpOnly" flag for the session cookie. Server.session.cookie.max-age = # Maximum Age of the session cookie in seconds. Server.session.cookie.name = # session cookie name. Server.session.cookie.path = # Path of the session cookie. server.session.cookie.secure = # "secure" flag for the session cookie. Server.session.persistent =false # Persist session data between restarts. Server.session.store-dir = # Directory used to store session data. Server.session.timeout = # session timeout in seconds. Server.session.tracking-modes = # session Tracking modes (one or more of the following: "Cookie", "url", "SSL"). Server.ssl.ciphers = # supported SSL ciphers. Server.ssl.client-auth = # Whether ClientAuthentication is wanted ("want") or needed ("need"). Requires a trust store. server.ssl.enabled = # Enable SSL support. Server.ssl.enabled-protocols = # enabled SSL protocols. Server.ssl.key-alias = # alias that identifies the key in the key store. Server.ssl.key-password = # password used to access the key in the key store. Server.ssl.key-store = # Path to the key store, that holds the SSL certificate (typically a JKS file). Server.ssl.key-store-password = # password used to access the key store. Server.ssl.key-store-provider = # Provider for the key store. Server.ssl.key-store-type = # type of the key store. Server.ssl.protocol =TLS # SSL protocol to use. Server.ssl.trust-store = # Trust store that holds SSL certificates. Server.ssl.trust-store-password = # password used to access the trust store. Server.ssl.trust-store-provider = # Provider for the Trust store. Server.ssl.trust-store-type = # type of the trust store. Server.tomcat.accesslog.directory =logs # directory in which log FIles is created. Can is relative to the Tomcat base dir or absolute. server.tomcat.accesslog.enabled =false # Enable access log. Server.tomcat.accesslog.pattern =common # Format pattern for access logs. Server.tomcat.accesslog.prefix =access_log # log file name prefix. Server.tomcat.accesslog.rename-on-rotate =false # Defer Inclusion of the date stamp in the file name until rotate time. Server.tomcat.accesslog.suffix =.log # log file name suffix. Server.tomcat.background-processor-delay =30 # Delay in seconds between the invocation of backgroundprocess methods. Server.tomcat.basedir = # Tomcat base directory. If not specified a temporary directory would be used. Server.tomcat.internal-proxies =10\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|\\ 192\\.168\\.\\d{1,3}\\.\\d{1,3}|\\ 169\\. 254\\.\\d{1,3}\\.\\d{1,3}|\\ 127\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|\\ 172\\.1[6-9]{1}\\.\\d{1,3}\\.\\d{1,3}|\\ 172 \\.2[0-9]{1}\\.\\d{1,3}\\.\\d{1,3}|\\ 172\\.3[0-1]{1}\\.\\d{1,3}\\.\\d{1,3} # Regular Expression MatchinG Trusted IP addresses. Server.tomcat.max-threads =0 # Maximum amount of worker threads. Server.tomcat.min-spare-threads =0 # Minimum amount of worker threads. Server.tomcat.port-header =x-forwarded-port # Name of the HTTP header used to override the original port value. Server.tomcat.protocol-header = # header that holds the incoming protocol, usually named "X-forwarded-proto". Server.tomcat.protocol-header-https-value =https # Value of the protocol header that indicates the incoming request U SES SSL. Server.tomcat.redirect-context-root = # Whether requests to the context root should is redirected by appending a/to the Path. Server.tomcat.remote-ip-header = # Name of the HTTP header from which the remote IP is extracted. For instance ' x-forwarded-for ' server.tomcat.uri-encoding =utf-8 # Character encoding the URI.
2, the above is not server.tomcat part is a common configuration of multiple containers, in fact, through the Java configuration can also be common configuration, such as the following case:/** * for multiple servlet container versatility configuration, Tomcat, jetty, Undertow * @ Return