SpringBoot 2.0 系列007 --WEB容器详解

ゞ浴缸里的玫瑰 2022-05-24 06:39 146阅读 0赞

# SpringBoot 2.0 系列007 --WEB容器详解 #

> 我们知道java常用的两大容器tomcat和jetty，其中SB默认内嵌了tomcat容器。那么SB都支持什么属性呢？

*  参阅ServerProperties.java

> 基本是通用的服务器配置，以及error、Compression、Http2、Servlet、Tomcat、Jetty、Undertow等配置。

# 可用配置 #

## 1. 通用服务配置 ##

### port ###

> 服务器端口号

*  使用方式

> server.port=8080，默認端口号8080

### address ###

> 服务绑定的网络地址

*  使用方式

> server.address=127.0.0.1

### useForwardHeaders ###

> 请求是否允许X-Forwarded-\*

*  使用方式

> server.use-forward-headers=false

### serverHeader ###

> 服务响应头信息

*  使用方式

> server.server-header=xxxx

### maxHttpHeaderSize ###

> 最大头信息大小

*  使用方式

> server.max-http-header-size=0

### connectionTimeout ###

> 连接超时时间

*  使用方式

> server.connection-timeout=-1

## 2. ssl ##

> 主要是ssl相关配置。具体参阅 org.springframework.boot.web.server.Ssl类

*  使用方式

> server.ssl.xxx=xxx

server.ssl.ciphers= # Supported SSL ciphers.
    server.ssl.client-auth= # Whether client authentication 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.

public class Ssl {
         
    
    	/**
    	 * Whether to enable SSL support.
    	 */
    	private boolean enabled = true;
    
    	/**
    	 * Whether client authentication is wanted ("want") or needed ("need"). Requires a
    	 * trust store.
    	 */
    	private ClientAuth clientAuth;
    
    	/**
    	 * Supported SSL ciphers.
    	 */
    	private String[] ciphers;
    
    	/**
    	 * Enabled SSL protocols.
    	 */
    	private String[] enabledProtocols;
    
    	/**
    	 * Alias that identifies the key in the key store.
    	 */
    	private String keyAlias;
    
    	/**
    	 * Password used to access the key in the key store.
    	 */
    	private String keyPassword;
    
    	/**
    	 * Path to the key store that holds the SSL certificate (typically a jks file).
    	 */
    	private String keyStore;
    
    	/**
    	 * Password used to access the key store.
    	 */
    	private String keyStorePassword;
    
    	/**
    	 * Type of the key store.
    	 */
    	private String keyStoreType;
    
    	/**
    	 * Provider for the key store.
    	 */
    	private String keyStoreProvider;
    
    	/**
    	 * Trust store that holds SSL certificates.
    	 */
    	private String trustStore;
    
    	/**
    	 * Password used to access the trust store.
    	 */
    	private String trustStorePassword;
    
    	/**
    	 * Type of the trust store.
    	 */
    	private String trustStoreType;
    
    	/**
    	 * Provider for the trust store.
    	 */
    	private String trustStoreProvider;
    
    	/**
    	 * SSL protocol to use.
    	 */
    	private String protocol = "TLS";
    
    	public boolean isEnabled() {
         
    		return this.enabled;
    	}
    
    	public void setEnabled(boolean enabled) {
         
    		this.enabled = enabled;
    	}
    
    	public ClientAuth getClientAuth() {
         
    		return this.clientAuth;
    	}
    
    	public void setClientAuth(ClientAuth clientAuth) {
         
    		this.clientAuth = clientAuth;
    	}
    
    	public String[] getCiphers() {
         
    		return this.ciphers;
    	}
    
    	public void setCiphers(String[] ciphers) {
         
    		this.ciphers = ciphers;
    	}
    
    	public String getKeyAlias() {
         
    		return this.keyAlias;
    	}
    
    	public void setKeyAlias(String keyAlias) {
         
    		this.keyAlias = keyAlias;
    	}
    
    	public String getKeyPassword() {
         
    		return this.keyPassword;
    	}
    
    	public void setKeyPassword(String keyPassword) {
         
    		this.keyPassword = keyPassword;
    	}
    
    	public String getKeyStore() {
         
    		return this.keyStore;
    	}
    
    	public void setKeyStore(String keyStore) {
         
    		this.keyStore = keyStore;
    	}
    
    	public String getKeyStorePassword() {
         
    		return this.keyStorePassword;
    	}
    
    	public void setKeyStorePassword(String keyStorePassword) {
         
    		this.keyStorePassword = keyStorePassword;
    	}
    
    	public String getKeyStoreType() {
         
    		return this.keyStoreType;
    	}
    
    	public void setKeyStoreType(String keyStoreType) {
         
    		this.keyStoreType = keyStoreType;
    	}
    
    	public String getKeyStoreProvider() {
         
    		return this.keyStoreProvider;
    	}
    
    	public void setKeyStoreProvider(String keyStoreProvider) {
         
    		this.keyStoreProvider = keyStoreProvider;
    	}
    
    	public String[] getEnabledProtocols() {
         
    		return this.enabledProtocols;
    	}
    
    	public void setEnabledProtocols(String[] enabledProtocols) {
         
    		this.enabledProtocols = enabledProtocols;
    	}
    
    	public String getTrustStore() {
         
    		return this.trustStore;
    	}
    
    	public void setTrustStore(String trustStore) {
         
    		this.trustStore = trustStore;
    	}
    
    	public String getTrustStorePassword() {
         
    		return this.trustStorePassword;
    	}
    
    	public void setTrustStorePassword(String trustStorePassword) {
         
    		this.trustStorePassword = trustStorePassword;
    	}
    
    	public String getTrustStoreType() {
         
    		return this.trustStoreType;
    	}
    
    	public void setTrustStoreType(String trustStoreType) {
         
    		this.trustStoreType = trustStoreType;
    	}
    
    	public String getTrustStoreProvider() {
         
    		return this.trustStoreProvider;
    	}
    
    	public void setTrustStoreProvider(String trustStoreProvider) {
         
    		this.trustStoreProvider = trustStoreProvider;
    	}
    
    	public String getProtocol() {
         
    		return this.protocol;
    	}
    
    	public void setProtocol(String protocol) {
         
    		this.protocol = protocol;
    	}
    
    	/**
    	 * Client authentication types.
    	 */
    	public enum ClientAuth {
         
    
    		/**
    		 * Client authentication is wanted but not mandatory.
    		 */
    		WANT,
    
    		/**
    		 * Client authentication is needed and mandatory.
    		 */
    		NEED
    
    	}
    
    }

## 3. compression ##

> 简单的压缩配置，具体参阅org.springframework.boot.web.server.Compression

*  使用方式

> server.compression.xx=xx

server.compression.enabled=false # Whether response compression is enabled.
    server.compression.excluded-user-agents= # List of user-agents to exclude from compression.
    server.compression.mime-types=text/html,text/xml,text/plain,text/css,text/javascript,application/javascript # Comma-separated list of MIME types that should be compressed.
    server.compression.min-response-size=2048 # Minimum "Content-Length" value that is required for compression to be performed.

*  附源码

public class Compression {
         
    
    	/**
    	 * Whether response compression is enabled.
    	 */
    	private boolean enabled = false;
    
    	/**
    	 * Comma-separated list of MIME types that should be compressed.
    	 */
    	private String[] mimeTypes = new String[] {
          "text/html", "text/xml", "text/plain",
    			"text/css", "text/javascript", "application/javascript", "application/json",
    			"application/xml" };
    
    	/**
    	 * Comma-separated list of user agents for which responses should not be compressed.
    	 */
    	private String[] excludedUserAgents = null;
    
    	/**
    	 * Minimum "Content-Length" value that is required for compression to be performed.
    	 */
    	private int minResponseSize = 2048;
    
    	public boolean getEnabled() {
         
    		return this.enabled;
    	}
    
    	public void setEnabled(boolean enabled) {
         
    		this.enabled = enabled;
    	}
    
    	public String[] getMimeTypes() {
         
    		return this.mimeTypes;
    	}
    
    	public void setMimeTypes(String[] mimeTypes) {
         
    		this.mimeTypes = mimeTypes;
    	}
    
    	public int getMinResponseSize() {
         
    		return this.minResponseSize;
    	}
    
    	public void setMinResponseSize(int minSize) {
         
    		this.minResponseSize = minSize;
    	}
    
    	public String[] getExcludedUserAgents() {
         
    		return this.excludedUserAgents;
    	}
    
    	public void setExcludedUserAgents(String[] excludedUserAgents) {
         
    		this.excludedUserAgents = excludedUserAgents;
    	}
    
    }

## 4. http2 ##

> 主要是开启http2的支持，具体参阅org.springframework.boot.web.server.Http2

*  使用方式

> server.http2.enabled=false

## 5. servlet ##

> 主要是servlet相关的配置，具体参阅org.springframework.boot.autoconfigure.web.ServerProperties.Servlet

*  使用方式

> server.servlet.contextPath=/chapter01

server.servlet.context-parameters.*= # Servlet context init parameters.
    server.servlet.context-path= # Context path of the application.
    server.servlet.application-display-name=application # Display name of the application.
    server.servlet.jsp.class-name=org.apache.jasper.servlet.JspServlet # The class name of the JSP servlet.
    server.servlet.jsp.init-parameters.*= # Init parameters used to configure the JSP servlet.
    server.servlet.jsp.registered=true # Whether the JSP servlet is registered.
    server.servlet.path=/ # Path of the main dispatcher servlet.
    server.servlet.session.cookie.comment= # Comment for the session cookie.
    server.servlet.session.cookie.domain= # Domain for the session cookie.
    server.servlet.session.cookie.http-only= # "HttpOnly" flag for the session cookie.
    server.servlet.session.cookie.max-age= # Maximum age of the session cookie. If a duration suffix is not specified, seconds will be used.
    server.servlet.session.cookie.name= # Session cookie name.
    server.servlet.session.cookie.path= # Path of the session cookie.
    server.servlet.session.cookie.secure= # "Secure" flag for the session cookie.
    server.servlet.session.persistent=false # Whether to persist session data between restarts.
    server.servlet.session.store-dir= # Directory used to store session data.
    server.servlet.session.timeout= # Session timeout. If a duration suffix is not specified, seconds will be used.
    server.servlet.session.tracking-modes= # Session tracking modes (one or more of the following: "cookie", "url", "ssl").

## 6. tomcat ##

> 主要是tomcat相关配置，具体参阅org.springframework.boot.autoconfigure.web.ServerProperties.Tomcat

*  使用方式

> server.tomcat.uri-encoding=UTF-8

server.tomcat.accept-count=0 # Maximum queue length for incoming connection requests when all possible request processing threads are in use. server.tomcat.accesslog.buffered=true # Whether to buffer output such that it is flushed only periodically. server.tomcat.accesslog.directory=logs # Directory in which log files are created. Can be absolute or relative to the Tomcat base dir. server.tomcat.accesslog.enabled=false # Enable access log. server.tomcat.accesslog.file-date-format=.yyyy-MM-dd # Date format to place in the log file name. 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 # Whether to defer inclusion of the date stamp in the file name until rotate time. server.tomcat.accesslog.request-attributes-enabled=false # Set request attributes for the IP address, Hostname, protocol, and port used for the request. server.tomcat.accesslog.rotate=true # Whether to enable access log rotation. server.tomcat.accesslog.suffix=.log # Log file name suffix. server.tomcat.additional-tld-skip-patterns= # Comma-separated list of additional patterns that match jars to ignore for TLD scanning. server.tomcat.background-processor-delay=30s # Delay between the invocation of backgroundProcess methods. If a duration suffix is not specified, seconds will be used. server.tomcat.basedir= # Tomcat base directory. If not specified, a temporary directory is 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-connections=0 # Maximum number of connections that the server accepts and processes at any given time. server.tomcat.max-http-header-size=0 # Maximum size, in bytes, of the HTTP message header. server.tomcat.max-http-post-size=0 # Maximum size, in bytes, of the HTTP post content. server.tomcat.max-threads=0 # Maximum number of worker threads. server.tomcat.min-spare-threads=0 # Minimum number 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 indicating whether the incoming request uses SSL. server.tomcat.redirect-context-root= # Whether requests to the context root should be 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.resource.cache-ttl= # Time-to-live of the static resource cache. server.tomcat.uri-encoding=UTF-8 # Character encoding to use to decode the URI. server.tomcat.use-relative-redirects= # Whether HTTP 1.1 and later location headers generated by a call to sendRedirect will use relative or absolute redirects.

## 7. jetty ##

> 也是一款web服务器，这里主要是jetty相关的配置，具体参阅org.springframework.boot.autoconfigure.web.ServerProperties.Jetty

*  使用方式

> server.jetty.selectors=1

server.jetty.acceptors= # Number of acceptor threads to use. server.jetty.accesslog.append=false # Append to log. server.jetty.accesslog.date-format=dd/MMM/yyyy:HH:mm:ss Z # Timestamp format of the request log. server.jetty.accesslog.enabled=false # Enable access log. server.jetty.accesslog.extended-format=false # Enable extended NCSA format. server.jetty.accesslog.file-date-format= # Date format to place in log file name. server.jetty.accesslog.filename= # Log filename. If not specified, logs redirect to "System.err". server.jetty.accesslog.locale= # Locale of the request log. server.jetty.accesslog.log-cookies=false # Enable logging of the request cookies. server.jetty.accesslog.log-latency=false # Enable logging of request processing time. server.jetty.accesslog.log-server=false # Enable logging of the request hostname. server.jetty.accesslog.retention-period=31 # Number of days before rotated log files are deleted. server.jetty.accesslog.time-zone=GMT # Timezone of the request log. server.jetty.max-http-post-size=0 # Maximum size, in bytes, of the HTTP post or put content. server.jetty.selectors= # Number of selector threads to use.

## 8. undertow ##

> 是红帽的一款开源web服务器，性能卓越。很多人推荐使用此款服务器。这里主要是undertow相关配置，具体参阅org.springframework.boot.autoconfigure.web.ServerProperties.Undertow

*  使用方式

> server.undertow.enabled=false

server.undertow.accesslog.dir= # Undertow access log directory.
    server.undertow.accesslog.enabled=false # Whether to enable the access log.
    server.undertow.accesslog.pattern=common # Format pattern for access logs.
    server.undertow.accesslog.prefix=access_log. # Log file name prefix.
    server.undertow.accesslog.rotate=true # Whether to enable access log rotation.
    server.undertow.accesslog.suffix=log # Log file name suffix.
    server.undertow.buffer-size= # Size of each buffer, in bytes.
    server.undertow.direct-buffers= # Whether to allocate buffers outside the Java heap.
    server.undertow.io-threads= # Number of I/O threads to create for the worker.
    server.undertow.eager-filter-init=true # Whether servlet filters should be initialized on startup.
    server.undertow.max-http-post-size=0 # Maximum size, in bytes, of the HTTP post content.
    server.undertow.worker-threads= # Number of worker threads.

## 9. error ##

> 错误相关配置

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.

# 三大服务器整合使用 #

> 这里是接之前的教程，默认已经引入我们的父工程。自己测试的话引入SB提供的parent即可。

## tomcat ##

> tomcat服务器的相关配置

*  内置tomcat方式

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

*  外置tomcat

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <exclusions>
                    
                    <exclusion>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-starter-tomcat</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            
            
            
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>3.1.0</version>
                <scope>provided</scope>
            </dependency>

*  application-tomcat.yml文件

server:
      tomcat:
        basedir: D:\work\ricky\tomcat

## jetty ##

> jetty相关配置

*  依赖

*  application-jetty.yml 示例

server:
      jetty:
        accesslog:
          enabled: true
          date-format: yyyy-MM-dd:HH:mm:ss
          filename: D:\work\ricky\jetty\access.log

## undertow ##

> undertow服务器整合

*  依赖

*  application-undertow.yml

server:
      undertow:
        accesslog:
          dir: D:\work\ricky\undertow\
          prefix: chapter05.
          suffix: log
          enabled: true

### 说明 ###

> 从启动和响应来看，undertow是最快的，tomcat和jetty相差不大。

## 附源码 ##

/*
     * Copyright 2012-2018 the original author or authors.
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *      http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    
    package org.springframework.boot.autoconfigure.web;
    
    import java.io.File;
    import java.net.InetAddress;
    import java.nio.charset.Charset;
    import java.time.Duration;
    import java.time.temporal.ChronoUnit;
    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Locale;
    import java.util.Map;
    import java.util.TimeZone;
    
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.boot.context.properties.NestedConfigurationProperty;
    import org.springframework.boot.convert.DurationUnit;
    import org.springframework.boot.web.server.Compression;
    import org.springframework.boot.web.server.Http2;
    import org.springframework.boot.web.server.Ssl;
    import org.springframework.boot.web.servlet.server.Jsp;
    import org.springframework.boot.web.servlet.server.Session;
    import org.springframework.util.Assert;
    import org.springframework.util.StringUtils;
    
    /**
     * {@link ConfigurationProperties} for a web server (e.g. port and path settings).
     *
     * @author Dave Syer
     * @author Stephane Nicoll
     * @author Andy Wilkinson
     * @author Ivan Sopov
     * @author Marcos Barbero
     * @author Eddú Meléndez
     * @author Quinten De Swaef
     * @author Venil Noronha
     * @author Aurélien Leboulanger
     * @author Brian Clozel
     * @author Olivier Lamy
     */
    @ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)
    public class ServerProperties {
         
    
    	/**
    	 * Server HTTP port.
    	 */
    	private Integer port;
    
    	/**
    	 * Network address to which the server should bind.
    	 */
    	private InetAddress address;
    
    	@NestedConfigurationProperty
    	private final ErrorProperties error = new ErrorProperties();
    
    	/**
    	 * Whether X-Forwarded-* headers should be applied to the HttpRequest.
    	 */
    	private Boolean useForwardHeaders;
    
    	/**
    	 * Value to use for the Server response header (if empty, no header is sent).
    	 */
    	private String serverHeader;
    
    	/**
    	 * Maximum size, in bytes, of the HTTP message header.
    	 */
    	private int maxHttpHeaderSize = 0; // bytes
    
    	/**
    	 * 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.
    	 */
    	private Duration connectionTimeout;
    
    	@NestedConfigurationProperty
    	private Ssl ssl;
    
    	@NestedConfigurationProperty
    	private final Compression compression = new Compression();
    
    	@NestedConfigurationProperty
    	private final Http2 http2 = new Http2();
    
    	private final Servlet servlet = new Servlet();
    
    	private final Tomcat tomcat = new Tomcat();
    
    	private final Jetty jetty = new Jetty();
    
    	private final Undertow undertow = new Undertow();
    
    	public Integer getPort() {
         
    		return this.port;
    	}
    
    	public void setPort(Integer port) {
         
    		this.port = port;
    	}
    
    	public InetAddress getAddress() {
         
    		return this.address;
    	}
    
    	public void setAddress(InetAddress address) {
         
    		this.address = address;
    	}
    
    	public Boolean isUseForwardHeaders() {
         
    		return this.useForwardHeaders;
    	}
    
    	public void setUseForwardHeaders(Boolean useForwardHeaders) {
         
    		this.useForwardHeaders = useForwardHeaders;
    	}
    
    	public String getServerHeader() {
         
    		return this.serverHeader;
    	}
    
    	public void setServerHeader(String serverHeader) {
         
    		this.serverHeader = serverHeader;
    	}
    
    	public int getMaxHttpHeaderSize() {
         
    		return this.maxHttpHeaderSize;
    	}
    
    	public void setMaxHttpHeaderSize(int maxHttpHeaderSize) {
         
    		this.maxHttpHeaderSize = maxHttpHeaderSize;
    	}
    
    	public Duration getConnectionTimeout() {
         
    		return this.connectionTimeout;
    	}
    
    	public void setConnectionTimeout(Duration connectionTimeout) {
         
    		this.connectionTimeout = connectionTimeout;
    	}
    
    	public ErrorProperties getError() {
         
    		return this.error;
    	}
    
    	public Ssl getSsl() {
         
    		return this.ssl;
    	}
    
    	public void setSsl(Ssl ssl) {
         
    		this.ssl = ssl;
    	}
    
    	public Compression getCompression() {
         
    		return this.compression;
    	}
    
    	public Http2 getHttp2() {
         
    		return this.http2;
    	}
    
    	public Servlet getServlet() {
         
    		return this.servlet;
    	}
    
    	public Tomcat getTomcat() {
         
    		return this.tomcat;
    	}
    
    	public Jetty getJetty() {
         
    		return this.jetty;
    	}
    
    	public Undertow getUndertow() {
         
    		return this.undertow;
    	}
    
    	/**
    	 * Servlet properties.
    	 */
    	public static class Servlet {
         
    
    		/**
    		 * Servlet context init parameters.
    		 */
    		private final Map<String, String> contextParameters = new HashMap<>();
    
    		/**
    		 * Context path of the application.
    		 */
    		private String contextPath;
    
    		/**
    		 * Display name of the application.
    		 */
    		private String applicationDisplayName = "application";
    
    		/**
    		 * Path of the main dispatcher servlet.
    		 */
    		private String path = "/";
    
    		@NestedConfigurationProperty
    		private final Jsp jsp = new Jsp();
    
    		@NestedConfigurationProperty
    		private final Session session = new Session();
    
    		public String getContextPath() {
         
    			return this.contextPath;
    		}
    
    		public void setContextPath(String contextPath) {
         
    			this.contextPath = cleanContextPath(contextPath);
    		}
    
    		private String cleanContextPath(String contextPath) {
         
    			if (StringUtils.hasText(contextPath) && contextPath.endsWith("/")) {
         
    				return contextPath.substring(0, contextPath.length() - 1);
    			}
    			return contextPath;
    		}
    
    		public String getApplicationDisplayName() {
         
    			return this.applicationDisplayName;
    		}
    
    		public void setApplicationDisplayName(String displayName) {
         
    			this.applicationDisplayName = displayName;
    		}
    
    		public String getPath() {
         
    			return this.path;
    		}
    
    		public void setPath(String path) {
         
    			Assert.notNull(path, "Path must not be null");
    			this.path = path;
    		}
    
    		public Map<String, String> getContextParameters() {
         
    			return this.contextParameters;
    		}
    
    		public Jsp getJsp() {
         
    			return this.jsp;
    		}
    
    		public Session getSession() {
         
    			return this.session;
    		}
    
    		public String getServletMapping() {
         
    			if (this.path.equals("") || this.path.equals("/")) {
         
    				return "/";
    			}
    			if (this.path.contains("*")) {
         
    				return this.path;
    			}
    			if (this.path.endsWith("/")) {
         
    				return this.path + "*";
    			}
    			return this.path + "/*";
    		}
    
    		public String getPath(String path) {
         
    			String prefix = getServletPrefix();
    			if (!path.startsWith("/")) {
         
    				path = "/" + path;
    			}
    			return prefix + path;
    		}
    
    		public String getServletPrefix() {
         
    			String result = this.path;
    			int index = result.indexOf('*');
    			if (index != -1) {
         
    				result = result.substring(0, index);
    			}
    			if (result.endsWith("/")) {
         
    				result = result.substring(0, result.length() - 1);
    			}
    			return result;
    		}
    
    		public String[] getPathsArray(Collection<String> paths) {
         
    			String[] result = new String[paths.size()];
    			int i = 0;
    			for (String path : paths) {
         
    				result[i++] = getPath(path);
    			}
    			return result;
    		}
    
    		public String[] getPathsArray(String[] paths) {
         
    			String[] result = new String[paths.length];
    			int i = 0;
    			for (String path : paths) {
         
    				result[i++] = getPath(path);
    			}
    			return result;
    		}
    
    	}
    
    	/**
    	 * Tomcat properties.
    	 */
    	public static class Tomcat {
         
    
    		/**
    		 * Access log configuration.
    		 */
    		private final Accesslog accesslog = new Accesslog();
    
    		/**
    		 * Regular expression matching trusted IP addresses.
    		 */
    		private String internalProxies = "10\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|" // 10/8
    				+ "192\\.168\\.\\d{1,3}\\.\\d{1,3}|" // 192.168/16
    				+ "169\\.254\\.\\d{1,3}\\.\\d{1,3}|" // 169.254/16
    				+ "127\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|" // 127/8
    				+ "172\\.1[6-9]{1}\\.\\d{1,3}\\.\\d{1,3}|" // 172.16/12
    				+ "172\\.2[0-9]{1}\\.\\d{1,3}\\.\\d{1,3}|"
    				+ "172\\.3[0-1]{1}\\.\\d{1,3}\\.\\d{1,3}";
    
    		/**
    		 * Header that holds the incoming protocol, usually named "X-Forwarded-Proto".
    		 */
    		private String protocolHeader;
    
    		/**
    		 * Value of the protocol header indicating whether the incoming request uses SSL.
    		 */
    		private String protocolHeaderHttpsValue = "https";
    
    		/**
    		 * Name of the HTTP header used to override the original port value.
    		 */
    		private String portHeader = "X-Forwarded-Port";
    
    		/**
    		 * Name of the HTTP header from which the remote IP is extracted. For instance,
    		 * `X-FORWARDED-FOR`.
    		 */
    		private String remoteIpHeader;
    
    		/**
    		 * Tomcat base directory. If not specified, a temporary directory is used.
    		 */
    		private File basedir;
    
    		/**
    		 * Delay between the invocation of backgroundProcess methods. If a duration suffix
    		 * is not specified, seconds will be used.
    		 */
    		@DurationUnit(ChronoUnit.SECONDS)
    		private Duration backgroundProcessorDelay = Duration.ofSeconds(30);
    
    		/**
    		 * Maximum number of worker threads.
    		 */
    		private int maxThreads = 0;
    
    		/**
    		 * Minimum number of worker threads.
    		 */
    		private int minSpareThreads = 0;
    
    		/**
    		 * Maximum size, in bytes, of the HTTP post content.
    		 */
    		private int maxHttpPostSize = 0;
    
    		/**
    		 * Maximum size, in bytes, of the HTTP message header.
    		 */
    		private int maxHttpHeaderSize = 0;
    
    		/**
    		 * Whether requests to the context root should be redirected by appending a / to
    		 * the path.
    		 */
    		private Boolean redirectContextRoot;
    
    		/**
    		 * Whether HTTP 1.1 and later location headers generated by a call to sendRedirect
    		 * will use relative or absolute redirects.
    		 */
    		private Boolean useRelativeRedirects;
    
    		/**
    		 * Character encoding to use to decode the URI.
    		 */
    		private Charset uriEncoding;
    
    		/**
    		 * Maximum number of connections that the server accepts and processes at any
    		 * given time. Once the limit has been reached, the operating system may still
    		 * accept connections based on the "acceptCount" property.
    		 */
    		private int maxConnections = 0;
    
    		/**
    		 * Maximum queue length for incoming connection requests when all possible request
    		 * processing threads are in use.
    		 */
    		private int acceptCount = 0;
    
    		/**
    		 * Comma-separated list of additional patterns that match jars to ignore for TLD
    		 * scanning. The special '?' and '*' characters can be used in the pattern to
    		 * match one and only one character and zero or more characters respectively.
    		 */
    		private List<String> additionalTldSkipPatterns = new ArrayList<>();
    
    		/**
    		 * Static resource configuration.
    		 */
    		private final Resource resource = new Resource();
    
    		public int getMaxThreads() {
         
    			return this.maxThreads;
    		}
    
    		public void setMaxThreads(int maxThreads) {
         
    			this.maxThreads = maxThreads;
    		}
    
    		public int getMinSpareThreads() {
         
    			return this.minSpareThreads;
    		}
    
    		public void setMinSpareThreads(int minSpareThreads) {
         
    			this.minSpareThreads = minSpareThreads;
    		}
    
    		public int getMaxHttpPostSize() {
         
    			return this.maxHttpPostSize;
    		}
    
    		public void setMaxHttpPostSize(int maxHttpPostSize) {
         
    			this.maxHttpPostSize = maxHttpPostSize;
    		}
    
    		public Accesslog getAccesslog() {
         
    			return this.accesslog;
    		}
    
    		public Duration getBackgroundProcessorDelay() {
         
    			return this.backgroundProcessorDelay;
    		}
    
    		public void setBackgroundProcessorDelay(Duration backgroundProcessorDelay) {
         
    			this.backgroundProcessorDelay = backgroundProcessorDelay;
    		}
    
    		public File getBasedir() {
         
    			return this.basedir;
    		}
    
    		public void setBasedir(File basedir) {
         
    			this.basedir = basedir;
    		}
    
    		public String getInternalProxies() {
         
    			return this.internalProxies;
    		}
    
    		public void setInternalProxies(String internalProxies) {
         
    			this.internalProxies = internalProxies;
    		}
    
    		public String getProtocolHeader() {
         
    			return this.protocolHeader;
    		}
    
    		public void setProtocolHeader(String protocolHeader) {
         
    			this.protocolHeader = protocolHeader;
    		}
    
    		public String getProtocolHeaderHttpsValue() {
         
    			return this.protocolHeaderHttpsValue;
    		}
    
    		public void setProtocolHeaderHttpsValue(String protocolHeaderHttpsValue) {
         
    			this.protocolHeaderHttpsValue = protocolHeaderHttpsValue;
    		}
    
    		public String getPortHeader() {
         
    			return this.portHeader;
    		}
    
    		public void setPortHeader(String portHeader) {
         
    			this.portHeader = portHeader;
    		}
    
    		public Boolean getRedirectContextRoot() {
         
    			return this.redirectContextRoot;
    		}
    
    		public void setRedirectContextRoot(Boolean redirectContextRoot) {
         
    			this.redirectContextRoot = redirectContextRoot;
    		}
    
    		public Boolean getUseRelativeRedirects() {
         
    			return this.useRelativeRedirects;
    		}
    
    		public void setUseRelativeRedirects(Boolean useRelativeRedirects) {
         
    			this.useRelativeRedirects = useRelativeRedirects;
    		}
    
    		public String getRemoteIpHeader() {
         
    			return this.remoteIpHeader;
    		}
    
    		public void setRemoteIpHeader(String remoteIpHeader) {
         
    			this.remoteIpHeader = remoteIpHeader;
    		}
    
    		public Charset getUriEncoding() {
         
    			return this.uriEncoding;
    		}
    
    		public void setUriEncoding(Charset uriEncoding) {
         
    			this.uriEncoding = uriEncoding;
    		}
    
    		public int getMaxConnections() {
         
    			return this.maxConnections;
    		}
    
    		public void setMaxConnections(int maxConnections) {
         
    			this.maxConnections = maxConnections;
    		}
    
    		public int getMaxHttpHeaderSize() {
         
    			return this.maxHttpHeaderSize;
    		}
    
    		public void setMaxHttpHeaderSize(int maxHttpHeaderSize) {
         
    			this.maxHttpHeaderSize = maxHttpHeaderSize;
    		}
    
    		public int getAcceptCount() {
         
    			return this.acceptCount;
    		}
    
    		public void setAcceptCount(int acceptCount) {
         
    			this.acceptCount = acceptCount;
    		}
    
    		public List<String> getAdditionalTldSkipPatterns() {
         
    			return this.additionalTldSkipPatterns;
    		}
    
    		public void setAdditionalTldSkipPatterns(List<String> additionalTldSkipPatterns) {
         
    			this.additionalTldSkipPatterns = additionalTldSkipPatterns;
    		}
    
    		public Resource getResource() {
         
    			return this.resource;
    		}
    
    		/**
    		 * Tomcat access log properties.
    		 */
    		public static class Accesslog {
         
    
    			/**
    			 * Enable access log.
    			 */
    			private boolean enabled = false;
    
    			/**
    			 * Format pattern for access logs.
    			 */
    			private String pattern = "common";
    
    			/**
    			 * Directory in which log files are created. Can be absolute or relative to
    			 * the Tomcat base dir.
    			 */
    			private String directory = "logs";
    
    			/**
    			 * Log file name prefix.
    			 */
    			protected String prefix = "access_log";
    
    			/**
    			 * Log file name suffix.
    			 */
    			private String suffix = ".log";
    
    			/**
    			 * Whether to enable access log rotation.
    			 */
    			private boolean rotate = true;
    
    			/**
    			 * Whether to defer inclusion of the date stamp in the file name until rotate
    			 * time.
    			 */
    			private boolean renameOnRotate;
    
    			/**
    			 * Date format to place in the log file name.
    			 */
    			private String fileDateFormat = ".yyyy-MM-dd";
    
    			/**
    			 * Set request attributes for the IP address, Hostname, protocol, and port
    			 * used for the request.
    			 */
    			private boolean requestAttributesEnabled;
    
    			/**
    			 * Whether to buffer output such that it is flushed only periodically.
    			 */
    			private boolean buffered = true;
    
    			public boolean isEnabled() {
         
    				return this.enabled;
    			}
    
    			public void setEnabled(boolean enabled) {
         
    				this.enabled = enabled;
    			}
    
    			public String getPattern() {
         
    				return this.pattern;
    			}
    
    			public void setPattern(String pattern) {
         
    				this.pattern = pattern;
    			}
    
    			public String getDirectory() {
         
    				return this.directory;
    			}
    
    			public void setDirectory(String directory) {
         
    				this.directory = directory;
    			}
    
    			public String getPrefix() {
         
    				return this.prefix;
    			}
    
    			public void setPrefix(String prefix) {
         
    				this.prefix = prefix;
    			}
    
    			public String getSuffix() {
         
    				return this.suffix;
    			}
    
    			public void setSuffix(String suffix) {
         
    				this.suffix = suffix;
    			}
    
    			public boolean isRotate() {
         
    				return this.rotate;
    			}
    
    			public void setRotate(boolean rotate) {
         
    				this.rotate = rotate;
    			}
    
    			public boolean isRenameOnRotate() {
         
    				return this.renameOnRotate;
    			}
    
    			public void setRenameOnRotate(boolean renameOnRotate) {
         
    				this.renameOnRotate = renameOnRotate;
    			}
    
    			public String getFileDateFormat() {
         
    				return this.fileDateFormat;
    			}
    
    			public void setFileDateFormat(String fileDateFormat) {
         
    				this.fileDateFormat = fileDateFormat;
    			}
    
    			public boolean isRequestAttributesEnabled() {
         
    				return this.requestAttributesEnabled;
    			}
    
    			public void setRequestAttributesEnabled(boolean requestAttributesEnabled) {
         
    				this.requestAttributesEnabled = requestAttributesEnabled;
    			}
    
    			public boolean isBuffered() {
         
    				return this.buffered;
    			}
    
    			public void setBuffered(boolean buffered) {
         
    				this.buffered = buffered;
    			}
    
    		}
    
    		/**
    		 * Tomcat static resource properties.
    		 */
    		public static class Resource {
         
    
    			/**
    			 * Time-to-live of the static resource cache.
    			 */
    			private Duration cacheTtl;
    
    			public Duration getCacheTtl() {
         
    				return this.cacheTtl;
    			}
    
    			public void setCacheTtl(Duration cacheTtl) {
         
    				this.cacheTtl = cacheTtl;
    			}
    
    		}
    
    	}
    
    	/**
    	 * Jetty properties.
    	 */
    	public static class Jetty {
         
    
    		/**
    		 * Access log configuration.
    		 */
    		private final Accesslog accesslog = new Accesslog();
    
    		/**
    		 * Maximum size, in bytes, of the HTTP post or put content.
    		 */
    		private int maxHttpPostSize = 0; // bytes
    
    		/**
    		 * Number of acceptor threads to use.
    		 */
    		private Integer acceptors;
    
    		/**
    		 * Number of selector threads to use.
    		 */
    		private Integer selectors;
    
    		public Accesslog getAccesslog() {
         
    			return this.accesslog;
    		}
    
    		public int getMaxHttpPostSize() {
         
    			return this.maxHttpPostSize;
    		}
    
    		public void setMaxHttpPostSize(int maxHttpPostSize) {
         
    			this.maxHttpPostSize = maxHttpPostSize;
    		}
    
    		public Integer getAcceptors() {
         
    			return this.acceptors;
    		}
    
    		public void setAcceptors(Integer acceptors) {
         
    			this.acceptors = acceptors;
    		}
    
    		public Integer getSelectors() {
         
    			return this.selectors;
    		}
    
    		public void setSelectors(Integer selectors) {
         
    			this.selectors = selectors;
    		}
    
    		/**
    		 * Jetty access log properties.
    		 */
    		public static class Accesslog {
         
    
    			/**
    			 * Enable access log.
    			 */
    			private boolean enabled = false;
    
    			/**
    			 * Log filename. If not specified, logs redirect to "System.err".
    			 */
    			private String filename;
    
    			/**
    			 * Date format to place in log file name.
    			 */
    			private String fileDateFormat;
    
    			/**
    			 * Number of days before rotated log files are deleted.
    			 */
    			private int retentionPeriod = 31; // no days
    
    			/**
    			 * Append to log.
    			 */
    			private boolean append;
    
    			/**
    			 * Enable extended NCSA format.
    			 */
    			private boolean extendedFormat;
    
    			/**
    			 * Timestamp format of the request log.
    			 */
    			private String dateFormat = "dd/MMM/yyyy:HH:mm:ss Z";
    
    			/**
    			 * Locale of the request log.
    			 */
    			private Locale locale;
    
    			/**
    			 * Timezone of the request log.
    			 */
    			private TimeZone timeZone = TimeZone.getTimeZone("GMT");
    
    			/**
    			 * Enable logging of the request cookies.
    			 */
    			private boolean logCookies;
    
    			/**
    			 * Enable logging of the request hostname.
    			 */
    			private boolean logServer;
    
    			/**
    			 * Enable logging of request processing time.
    			 */
    			private boolean logLatency;
    
    			public boolean isEnabled() {
         
    				return this.enabled;
    			}
    
    			public void setEnabled(boolean enabled) {
         
    				this.enabled = enabled;
    			}
    
    			public String getFilename() {
         
    				return this.filename;
    			}
    
    			public void setFilename(String filename) {
         
    				this.filename = filename;
    			}
    
    			public String getFileDateFormat() {
         
    				return this.fileDateFormat;
    			}
    
    			public void setFileDateFormat(String fileDateFormat) {
         
    				this.fileDateFormat = fileDateFormat;
    			}
    
    			public int getRetentionPeriod() {
         
    				return this.retentionPeriod;
    			}
    
    			public void setRetentionPeriod(int retentionPeriod) {
         
    				this.retentionPeriod = retentionPeriod;
    			}
    
    			public boolean isAppend() {
         
    				return this.append;
    			}
    
    			public void setAppend(boolean append) {
         
    				this.append = append;
    			}
    
    			public boolean isExtendedFormat() {
         
    				return this.extendedFormat;
    			}
    
    			public void setExtendedFormat(boolean extendedFormat) {
         
    				this.extendedFormat = extendedFormat;
    			}
    
    			public String getDateFormat() {
         
    				return this.dateFormat;
    			}
    
    			public void setDateFormat(String dateFormat) {
         
    				this.dateFormat = dateFormat;
    			}
    
    			public Locale getLocale() {
         
    				return this.locale;
    			}
    
    			public void setLocale(Locale locale) {
         
    				this.locale = locale;
    			}
    
    			public TimeZone getTimeZone() {
         
    				return this.timeZone;
    			}
    
    			public void setTimeZone(TimeZone timeZone) {
         
    				this.timeZone = timeZone;
    			}
    
    			public boolean isLogCookies() {
         
    				return this.logCookies;
    			}
    
    			public void setLogCookies(boolean logCookies) {
         
    				this.logCookies = logCookies;
    			}
    
    			public boolean isLogServer() {
         
    				return this.logServer;
    			}
    
    			public void setLogServer(boolean logServer) {
         
    				this.logServer = logServer;
    			}
    
    			public boolean isLogLatency() {
         
    				return this.logLatency;
    			}
    
    			public void setLogLatency(boolean logLatency) {
         
    				this.logLatency = logLatency;
    			}
    		}
    
    	}
    
    	/**
    	 * Undertow properties.
    	 */
    	public static class Undertow {
         
    
    		/**
    		 * Maximum size, in bytes, of the HTTP post content.
    		 */
    		private long maxHttpPostSize = 0; // bytes
    
    		/**
    		 * Size of each buffer, in bytes.
    		 */
    		private Integer bufferSize;
    
    		/**
    		 * Number of I/O threads to create for the worker.
    		 */
    		private Integer ioThreads;
    
    		/**
    		 * Number of worker threads.
    		 */
    		private Integer workerThreads;
    
    		/**
    		 * Whether to allocate buffers outside the Java heap.
    		 */
    		private Boolean directBuffers;
    
    		/**
    		 * Whether servlet filters should be initialized on startup.
    		 */
    		private boolean eagerFilterInit = true;
    
    		private final Accesslog accesslog = new Accesslog();
    
    		public long getMaxHttpPostSize() {
         
    			return this.maxHttpPostSize;
    		}
    
    		public void setMaxHttpPostSize(long maxHttpPostSize) {
         
    			this.maxHttpPostSize = maxHttpPostSize;
    		}
    
    		public Integer getBufferSize() {
         
    			return this.bufferSize;
    		}
    
    		public void setBufferSize(Integer bufferSize) {
         
    			this.bufferSize = bufferSize;
    		}
    
    		public Integer getIoThreads() {
         
    			return this.ioThreads;
    		}
    
    		public void setIoThreads(Integer ioThreads) {
         
    			this.ioThreads = ioThreads;
    		}
    
    		public Integer getWorkerThreads() {
         
    			return this.workerThreads;
    		}
    
    		public void setWorkerThreads(Integer workerThreads) {
         
    			this.workerThreads = workerThreads;
    		}
    
    		public Boolean getDirectBuffers() {
         
    			return this.directBuffers;
    		}
    
    		public void setDirectBuffers(Boolean directBuffers) {
         
    			this.directBuffers = directBuffers;
    		}
    
    		public boolean isEagerFilterInit() {
         
    			return this.eagerFilterInit;
    		}
    
    		public void setEagerFilterInit(boolean eagerFilterInit) {
         
    			this.eagerFilterInit = eagerFilterInit;
    		}
    
    		public Accesslog getAccesslog() {
         
    			return this.accesslog;
    		}
    
    		/**
    		 * Undertow access log properties.
    		 */
    		public static class Accesslog {
         
    
    			/**
    			 * Whether to enable the access log.
    			 */
    			private boolean enabled = false;
    
    			/**
    			 * Format pattern for access logs.
    			 */
    			private String pattern = "common";
    
    			/**
    			 * Log file name prefix.
    			 */
    			protected String prefix = "access_log.";
    
    			/**
    			 * Log file name suffix.
    			 */
    			private String suffix = "log";
    
    			/**
    			 * Undertow access log directory.
    			 */
    			private File dir = new File("logs");
    
    			/**
    			 * Whether to enable access log rotation.
    			 */
    			private boolean rotate = true;
    
    			public boolean isEnabled() {
         
    				return this.enabled;
    			}
    
    			public void setEnabled(boolean enabled) {
         
    				this.enabled = enabled;
    			}
    
    			public String getPattern() {
         
    				return this.pattern;
    			}
    
    			public void setPattern(String pattern) {
         
    				this.pattern = pattern;
    			}
    
    			public String getPrefix() {
         
    				return this.prefix;
    			}
    
    			public void setPrefix(String prefix) {
         
    				this.prefix = prefix;
    			}
    
    			public String getSuffix() {
         
    				return this.suffix;
    			}
    
    			public void setSuffix(String suffix) {
         
    				this.suffix = suffix;
    			}
    
    			public File getDir() {
         
    				return this.dir;
    			}
    
    			public void setDir(File dir) {
         
    				this.dir = dir;
    			}
    
    			public boolean isRotate() {
         
    				return this.rotate;
    			}
    
    			public void setRotate(boolean rotate) {
         
    				this.rotate = rotate;
    			}
    
    		}
    
    	}
    
    }

*  @ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)

> 表示配置属性是server开头 忽略不知道的属性

## 演示项目地址,欢迎fork和star ##

> 码云：[SpringBootLearn][]

# 最后 #

*  [SpringBoot 2.0 系列001 -- 入门介绍以及相关概念][SpringBoot 2.0 _001 --]
 *  [SpringBoot 2.0 系列002 --运行流程分析][SpringBoot 2.0 _002 --]
 *  [SpringBoot 2.0 系列003 -- 自定义Parent][SpringBoot 2.0 _003 -- _Parent]
 *  [SpringBoot 2.0 系列004 -- 启动实战之配置文件][SpringBoot 2.0 _004 --]
 *  [SpringBoot 2.0 系列005 -- 启动实战之SpringApplication应用][SpringBoot 2.0 _005 -- _SpringApplication]
 *  [SpringBoot 2.0 系列006 -- 启动实战之注解使用][SpringBoot 2.0 _006 --]
 *  作者ricky
 *  交流群：244930845

[SpringBootLearn]: https://gitee.com/bgt0314/SpringBootLearn
[SpringBoot 2.0 _001 --]: https://blog.csdn.net/u014042066/article/details/80271073
[SpringBoot 2.0 _002 --]: https://blog.csdn.net/u014042066/article/details/80311954
[SpringBoot 2.0 _003 -- _Parent]: https://blog.csdn.net/u014042066/article/details/80321856
[SpringBoot 2.0 _004 --]: https://blog.csdn.net/u014042066/article/details/80336467
[SpringBoot 2.0 _005 -- _SpringApplication]: https://blog.csdn.net/u014042066/article/details/80353282
[SpringBoot 2.0 _006 --]: https://blog.csdn.net/u014042066/article/details/80366042https://blog.csdn.net/u014042066/article/details/80366042