详解springboot-修改内置tomcat版本

下面是详细讲解“详解springboot-修改内置tomcat版本”的完整攻略。

1. 背景说明

SpringBoot是目前比较流行的Java Web应用快速开发框架之一，它内置了Tomcat作为Web容器。但有时候，我们可能需要使用更高版本或更低版本的Tomcat容器，或者对现有的Tomcat进行优化和定制化。本文将详细讲解如何修改SpringBoot内置Tomcat版本。

2. 修改步骤

2.1 添加Tomcat的依赖

首先，我们需要移除SpringBoot默认的Tomcat依赖，并添加我们需要的Tomcat版本的依赖。以将内置Tomcat版本升级至9.0.53为例，我们需要在pom.xml文件中添加如下依赖：

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>9.0.53</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-websocket</artifactId>
    <version>9.0.53</version>
</dependency>

2.2 修改SpringBoot应用启动类

修改SpringBoot应用启动类，指定使用我们所添加的Tomcat容器：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration;
import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;

@SpringBootApplication(exclude = { ServletWebServerFactoryAutoConfiguration.class,
                                    EmbeddedWebServerFactoryCustomizerAutoConfiguration.class })
public class Application {
    public static void main(String[] args) {
        new SpringApplicationBuilder(Application.class)
                .web(WebApplicationType.NONE)
                .build()
                .run(args);
    }

    public ConfigurableServletWebServerFactory webServerFactory() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        // 设置Tomcat版本
        factory.setTomcatVersion("9.0.53");
        return factory;
    }
}

2.3 运行SpringBoot应用

经过以上两步配置后，运行SpringBoot应用即可使用我们指定版本的Tomcat容器。可以通过访问应用中的/servlet-context接口来确认Tomcat版本是否为我们所指定的版本。

3. 示例代码

下面是两种不同的示例代码，一种将Tomcat版本升级至9.0.53，另外一种将Tomcat版本降级至7.0.107。

3.1 示例代码一：升级Tomcat版本至9.0.53

<!-- pom.xml -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>9.0.53</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-websocket</artifactId>
    <version>9.0.53</version>
</dependency>

// Application.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration;
import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;

@SpringBootApplication(exclude = { ServletWebServerFactoryAutoConfiguration.class,
                                    EmbeddedWebServerFactoryCustomizerAutoConfiguration.class })
public class Application {
    public static void main(String[] args) {
        new SpringApplicationBuilder(Application.class)
                .web(WebApplicationType.NONE)
                .build()
                .run(args);
    }

    public ConfigurableServletWebServerFactory webServerFactory() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        // 设置Tomcat版本
        factory.setTomcatVersion("9.0.53");
        return factory;
    }
}

3.2 示例代码二：降级Tomcat版本至7.0.107

<!-- pom.xml -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>7.0.107</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-websocket</artifactId>
    <version>7.0.107</version>
</dependency>

// Application.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration;
import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;

@SpringBootApplication(exclude = { ServletWebServerFactoryAutoConfiguration.class,
                                    EmbeddedWebServerFactoryCustomizerAutoConfiguration.class })
public class Application {
    public static void main(String[] args) {
        new SpringApplicationBuilder(Application.class)
                .web(WebApplicationType.NONE)
                .build()
                .run(args);
    }

    public ConfigurableServletWebServerFactory webServerFactory() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        // 设置Tomcat版本
        factory.setTomcatVersion("7.0.107");
        return factory;
    }
}

以上就是详解SpringBoot-修改内置Tomcat版本的攻略，希望对大家有所帮助。