• SpringBoot优化内嵌的Tomcat ---设置MaxConnections

    使用kill -9杀掉springboot应用后，立马java -jar重启，会报错，需要等待一段时间才能启动成功，
    报错的原因是：/tmp/tomcat-docbase.4749794910434376321.9086] is not valid
    以下是详细错误信息：

    复制代码
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@53001498]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:158) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4831) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4963) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
... 7 more
Caused by: java.lang.IllegalArgumentException: The main resource set specified [/tmp/tomcat-docbase.4749794910434376321.9086] is not valid
at org.apache.catalina.webresources.StandardRoot.createMainResourceSet(StandardRoot.java:725) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:686) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:152) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4831) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4963) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
... 7 more
mealtime-report-[15:48:37:716] [ERROR] - org.apache.juli.logging.DirectJDKLog.log(DirectJDKLog.java:181) - A child container failed during start
    复制代码
    复制代码
    [root@localhost tmp]# ls -dlt tomcat*
drwxr-xr-x 3 root root 4096 May 15 14:19 tomcat.2482651926943103152.4444
drwxr-xr-x 2 root root 4096 May 15 14:19 tomcat-docbase.1606353072223048027.4444
drwxr-xr-x 3 root root 4096 May 15 14:19 tomcat.6427937730432992105.4004
drwxr-xr-x 2 root root 4096 May 15 14:19 tomcat-docbase.9014354490424152602.4004
drwxr-xr-x 3 root root 4096 May 14 18:21 tomcat.365692316696650885.2000
drwxr-xr-x 2 root root 4096 May 14 18:21 tomcat-docbase.8871210702020412482.2000
drwxr-xr-x 3 root root 4096 May 14 18:21 tomcat.9194454391130879725.2222
drwxr-xr-x 2 root root 4096 May 14 18:21 tomcat-docbase.6449009990528406178.2222
drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.7533402776366547594.3333
drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.8347169054078560101.3333
drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.5755321441664547955.3004
drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.4368794759444711233.3004
drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.7487101127514666304.4444
drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.3505389582011000978.4444
drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.6483749742824168608.4004
drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.2936863713994400124.4004
drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.8814016287852028090.2000
drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.5759661693624441557.2000
drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.3084296173620137759.2222
drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.2913734529869658765.2222
drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.1261539854295462589.3333
drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.4327066414867055940.3333
drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.1652439996406851728.3004
drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.5233226104416503892.3004
drwxr-xr-x 3 root root 4096 May 11 11:38 tomcat.8505864110333115533.3333
drwxr-xr-x 2 root root 4096 May 11 11:38 tomcat-docbase.5036544091928181133.3333
drwxr-xr-x 3 root root 4096 May 11 11:37 tomcat.494020510980868278.3004
drwxr-xr-x 2 root root 4096 May 11 11:37 tomcat-docbase.468265602651303178.3004
drwxr-xr-x 3 root root 4096 May 11 11:36 tomcat.8093369488059063930.3004
drwxr-xr-x 2 root root 4096 May 11 11:36 tomcat-docbase.7679645853200594654.3004
drwxr-xr-x 3 root root 4096 May 11 11:31 tomcat.5040740781547956399.4444
drwxr-xr-x 2 root root 4096 May 11 11:31 tomcat-docbase.8256790475295084303.4444
drwxr-xr-x 3 root root 4096 May 11 11:31 tomcat.7344112750169248130.4004
drwxr-xr-x 2 root root 4096 May 11 11:31 tomcat-docbase.2016044219412775812.4004
drwxr-xr-x 3 root root 4096 May 11 11:30 tomcat.3866209351076068036.4444
    复制代码

    SpringBoot测试版本

    复制代码
    <parent>  
    <groupId>org.springframework.boot</groupId>  
    <artifactId>spring-boot-starter-parent</artifactId>  
    <version>1.3.3.RELEASE</version>  
</parent>  
<dependencies>  
    <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-web</artifactId>  
    </dependency>  
</dependencies>
    复制代码

    SpringBoot默认使用的是Tomcat作为web server

    springboot中默认可以通过配置如下参数设置内嵌容器Tomcat的端口，最大线程数等等

    server.port=8081
server.tomcat.max-threads=1000

    但是，无法设置最大连接数，而最大连接数直接影响到Tomcat的性能，如何调整这个最大连接数呢？

    以下有三种方法

    一：

    复制代码
    import org.apache.catalina.connector.Connector;  
import org.apache.coyote.http11.Http11NioProtocol;  
import org.springframework.boot.context.embedded.EmbeddedServletContainer;  
import org.springframework.boot.context.embedded.ServletContextInitializer;  
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;  
import org.springframework.stereotype.Component;  
  
@Component()  
public class MyEmbeddedServletContainerFactory extends TomcatEmbeddedServletContainerFactory  
{  
    public EmbeddedServletContainer getEmbeddedServletContainer(ServletContextInitializer... initializers)  
    {  
        //设置端口  
        this.setPort(8081);  
        return super.getEmbeddedServletContainer(initializers);  
    }  
      
    protected void customizeConnector(Connector connector)  
    {  
        super.customizeConnector(connector);  
        Http11NioProtocol protocol = (Http11NioProtocol)connector.getProtocolHandler();  
        //设置最大连接数  
        protocol.setMaxConnections(2000);  
        //设置最大线程数  
        protocol.setMaxThreads(2000);  
        protocol.setConnectionTimeout(30000);  
    }  
}
    复制代码

    二：

    复制代码
    import org.apache.catalina.connector.Connector;  
import org.apache.coyote.http11.Http11NioProtocol;  
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;  
import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer;  
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;  
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.Configuration;  
  
@Configuration  
public class WebServerConfiguration  
{  
    @Bean  
    public EmbeddedServletContainerFactory createEmbeddedServletContainerFactory()  
    {  
        TomcatEmbeddedServletContainerFactory tomcatFactory = new TomcatEmbeddedServletContainerFactory();  
        tomcatFactory.setPort(8081);  
        tomcatFactory.addConnectorCustomizers(new MyTomcatConnectorCustomizer());  
        return tomcatFactory;  
    }  
}  
class MyTomcatConnectorCustomizer implements TomcatConnectorCustomizer  
{  
    public void customize(Connector connector)  
    {  
        Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();  
        //设置最大连接数  
        protocol.setMaxConnections(2000);  
        //设置最大线程数  
        protocol.setMaxThreads(2000);  
        protocol.setConnectionTimeout(30000);  
    }  
}
    复制代码
     

    三：

    复制代码
    import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;  
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;  
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;  
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.Configuration;  
  
@Configuration  
public class WebServerConfiguration  
{  
    @Bean  
    public EmbeddedServletContainerCustomizer createEmbeddedServletContainerCustomizer()  
    {  
        return new MyEmbeddedServletContainerCustomizer();  
    }  
}  
  
class MyEmbeddedServletContainerCustomizer implements EmbeddedServletContainerCustomizer  
{  
    public void customize(ConfigurableEmbeddedServletContainer container)  
    {  
        TomcatEmbeddedServletContainerFactory tomcatFactory = (TomcatEmbeddedServletContainerFactory)container;  
        tomcatFactory.setPort(8081);  
        //下面的操作可以参照上面的方法  
    }  
}
    复制代码

    最后，如果发现没有生效，就把application.properties配置里面关于Tomcat的一些配置(server.*)全部删掉，就OK了。

    自定义tomcat

    在实际的项目中简单的配置tomcat端口肯定无法满足大家的需求，因此需要自定义tomcat配置信息来灵活的控制tomcat。

    以定义默认编码为例

    package com.lkl.springboot.container.tomcat;

import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * tomcat 配置
 * @author liaokailin
 * @version $Id: TomcatConfig.java, v 0.1 2015年10月4日 上午12:11:47 liaokailin Exp $
 */
@Configuration
public class TomcatConfig {

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
        tomcat.setUriEncoding("UTF-8");
        return tomcat;
    }

}
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    构建EmbeddedServletContainerFactory的bean，获取到TomcatEmbeddedServletContainerFactory实例以后可以对tomcat进行设置，例如这里设置编码为UTF-8

    SSL配置

    生成证书

    keytool -genkey -alias springboot -keyalg RSA -keystore /Users/liaokailin/software/ca1/keystore
设置密码123456

    生成证书

    tomcat中验证证书是否正确

    修改tomcat/conf/server.xml文件

    <Connector
              protocol="org.apache.coyote.http11.Http11NioProtocol"
              port="8443" maxThreads="200"
              scheme="https" secure="true" SSLEnabled="true"
              keystoreFile="/Users/liaokailin/software/ca1/keystore" keystorePass="123456"
              clientAuth="false" sslProtocol="TLS"/>
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    启动tomcat ，访问 http://localhost:8443

    https访问

    spring boot 内嵌tomcat ssl

    配置资源文件

    server.port=8443
server.ssl.enabled=true
server.ssl.keyAlias=springboot
server.ssl.keyPassword=123456
server.ssl.keyStore=/Users/liaokailin/software/ca1/keystore
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    • server.ssl.enabled 启动tomcat ssl配置
    • server.ssl.keyAlias 别名
    • server.ssl.keyPassword 密码
    • server.ssl.keyStore 位置

    启动 spring boot

    启动spring boot

    访问https://localhost:8443/springboot/helloworld

    访问https

    多端口监听配置

    前面启动ssl后只能走https,不能通过http进行访问，如果要监听多端口，可采用编码形式实现。

    1.注销前面ssl配置，设置配置 server.port=9090

    2.修改TomcatConfig.Java

    
package com.lkl.springboot.container.tomcat;

import java.io.File;

import org.apache.catalina.connector.Connector;
import org.apache.coyote.http11.Http11NioProtocol;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * tomcat 配置
 * @author liaokailin
 * @version $Id: TomcatConfig.java, v 0.1 2015年10月4日 上午12:11:47 liaokailin Exp $
 */
@Configuration
public class TomcatConfig {

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
        tomcat.setUriEncoding("UTF-8");
        tomcat.addAdditionalTomcatConnectors(createSslConnector());
        return tomcat;
    }

    private Connector createSslConnector() {
        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
        Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();
        try {
            File truststore = new File("/Users/liaokailin/software/ca1/keystore");
            connector.setScheme("https");
            protocol.setSSLEnabled(true);
            connector.setSecure(true);
            connector.setPort(8443);
            protocol.setKeystoreFile(truststore.getAbsolutePath());
            protocol.setKeystorePass("123456");
            protocol.setKeyAlias("springboot");
            return connector;
        } catch (Exception ex) {
            throw new IllegalStateException("cant access keystore: [" + "keystore" + "]  ", ex);
        }
    }
}
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    通过addAdditionalTomcatConnectors方法添加多个监听连接;此时可以通过http 9090端口，https 8443端口。
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  • 原文地址：https://www.cnblogs.com/exmyth/p/7367807.html
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