springboot3配置jetty容器

springboot3配置jetty容器

前言：springboot3使用jetty容器，在构建时报错

2023-05-25T11:18:54.345+08:00  WARN 48956 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server

Caused by: java.lang.NoClassDefFoundError: jakarta/servlet/http/HttpSessionContext

后来查找原因发现是由于springboot3使用的是jakarta.servlet-api的版本为6，而项目使用的jetty服务器在6里边缺少对应的api。

解决方案

控制springboot3中jakarta.servlet-api的版本：

gradle[build.gradle.kts]

ext["jakarta-servlet.version"] = "5.0.0"

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	implementation("org.springframework.boot:spring-boot-starter-jetty")
	modules {
		module("org.springframework.boot:spring-boot-starter-tomcat") {
			replacedBy("org.springframework.boot:spring-boot-starter-jetty", "Use Jetty instead of Tomcat")
		}
	}
}

maven[pom.xml]

<!--1使用dependencyManagement控制版本-->
<dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>jakarta.servlet</groupId>
			<artifactId>jakarta.servlet-api</artifactId>
			<version>5.0.0</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-dependencies</artifactId>
			<version>3.0.0</version>
			<type>pom</type>
			<scope>import</scope>
		</dependency>
	</dependencies>
</dependencyManagement>
<!--指定版本-->
<properties>
    <jakarta-servlet.version>5.0.0</jakarta-servlet.version>
</properties>
<dependencies>
    <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>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
</dependencies>