如何知道spring boot中嵌入了哪个tomcat版本

Question

I used spring boot in project. It has inbuild tomcat server. I find out a jar spring-boot-starter-tomcat-1.2.5.RELEASE.jar . I required to do certain tomcat related configuration on linux server.

How can I get to know which tomcat version used in this?

Answer 1

You can also check the version without leaving your IDE by seeing the effective pom.

For example, if you are using IntelliJ you can view effective pom by right clicking pom.xml > Maven > Show effective POM .

...or from the command line by issuing mvn help:effective-pom

Answer 2

通过http://search.maven.org/ ，在https://repo1.maven.org/maven2/org/springframework/boot/spring-boot-dependencies/1.2.5.RELEASE/spring-boot-dependencies-1.2 .5.RELEASE.pom :

<tomcat.version>8.0.23</tomcat.version>

Answer 3

or For Gradle print the dependepency tree via the console with

./gradlew dependencies

Example snippet from output:

...
|    +--- org.springframework.boot:spring-boot-starter-tomcat:2.1.0.RELEASE
|    |    +--- javax.annotation:javax.annotation-api:1.3.2
|    |    +--- org.apache.tomcat.embed:tomcat-embed-core:9.0.12
|    |    +--- org.apache.tomcat.embed:tomcat-embed-el:9.0.12
|    |    \--- org.apache.tomcat.embed:tomcat-embed-websocket:9.0.12
|    |         \--- org.apache.tomcat.embed:tomcat-embed-core:9.0.12
...

In my example above it is tomcat version 9.0.12

Answer 4

You can look at http://mvnrepository.com/ :

http://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-tomcat/1.2.5.RELEASE

Below you have section Compile Dependencies and you can see that it uses Tomcat 8.0.23 .

Answer 5

You can check the versions of all the dependencies in the dependency tree.

for that:

• go to the directory of pom.xml

• run the following command:

  $ mvn dependency:tree

  [INFO] Scanning for projects... enter code here [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building {Project Name} [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ spring-mvc-logback --- [INFO] com.sj.common:spring-mvc-logback:war:1.0-SNAPSHOT [INFO] +- org.springframework:spring-core:jar:4.1.6.RELEASE:compile [INFO] +- org.springframework:spring-webmvc:jar:4.1.6.RELEASE:compile [INFO] | +- org.springframework:spring-beans:jar:4.1.6.RELEASE:compile [INFO] | +- org.springframework:spring-context:jar:4.1.6.RELEASE:compile [INFO] | | \\- org.springframework:spring-aop:jar:4.1.6.RELEASE:compile [INFO] | | \\- aopalliance:aopalliance:jar:1.0:compile [INFO] | +- org.springframework:spring-expression:jar:4.1.6.RELEASE:compile [INFO] | \\- org.springframework:spring-web:jar:4.1.6.RELEASE:compile [INFO] +- org.slf4j:jcl-over-slf4j:jar:1.7.12:compile [INFO] | \\- org.slf4j:slf4j-api:jar:1.7.12:compile [INFO] +- ch.qos.logback:logback-classic:jar:1.1.3:compile [INFO] | \\- ch.qos.logback:logback-core:jar:1.1.3:compile [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.937 s [INFO] Finished at: 2015-06-19T19:17:54+08:00 [INFO] Final Memory: 13M/308M [INFO] ------------------------------------------------------------------------

And you will be able to watch all the dependencies and versions associated with that dependency.

Answer 6

In Eclipse IDE:

1. Open your pom.xml
2. Go to "Effective POM" tab
3. Search for "tomcat"
4. Find <tomcat.version> line, for example: <tomcat.version>9.0.27</tomcat.version>

Answer 7

For those who use PCF ie cloudfoundry

I generally keep spring boot tomcat dependency as provided Which means my local tomcat version may be slightly different.

The java buildpack includes the tomcat version

https://github.com/cloudfoundry/java-buildpack/releases

eg java buildpack 4.19.1 comes with Openjdk 1.8.0_212 and tomcat 9.0.19

Answer 8

Consider the below snippet of your project's pom.xml wherein default parent is spring-boot-starter-parent

Your project pom.xml

<!--Spring boot parent project -->
<parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.4.5</version>
 <relativePath /> <!-- lookup parent from repository -->
</parent>

Next lookup pom.xml of spring-boot-starter-parent project to see the dependencies, it has the spring-boot-dependencies as its parent. If using modern IDEs like IntelliJ/Vscode can easily traverse within IDE.

spring-boot-starter-parent pom.xml

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-dependencies</artifactId>
  <version>2.4.5</version>
</parent>

One level up again ie, to spring-boot-dependencies it further doesn't have a parent, under properties all the defaults are listed. Sample snippet below having non exhaustive list showing only tomcat.

spring-boot-dependencies pom.xml

<properties>
  <!-- Other dependencies -->
  <tomcat.version>9.0.45</tomcat.version>
  <!-- Other dependencies -->
</properties>

This way, we can search for all the defaults out of the box.

Answer 9

通过控制台打印依赖树

mvn dependency:tree