Eclipse是否内置完整Tomcat服务器？如何验证其版本信息？

Hey there! Great question—let’s break this down clearly for you.

First off: Eclipse does NOT come with a full, pre-installed Tomcat server out of the box. While the Eclipse for Java EE Developers distribution includes the Web Tools Platform (WTP) which streamlines integrating Tomcat, you still need to either link a local Tomcat installation you’ve downloaded, or use Eclipse’s built-in wizard to download and set up a Tomcat instance directly within the IDE.

Checking Your Tomcat Version #

There are a few straightforward ways to confirm the Tomcat version you’re using in Eclipse:

• Through Eclipse’s Server Preferences:
  1. Open Eclipse, then go to Window > Preferences (Windows/Linux) or Eclipse > Settings (Mac).
  2. Expand the Server section and select Runtime Environments.
  3. Locate your configured Tomcat entry—its full version (like Apache Tomcat 9.0.73) will be displayed right next to it.
• Via Tomcat’s Local Files:
  If you’ve manually installed Tomcat on your machine, navigate to its root directory and open the RELEASE-NOTES file. The exact version is listed at the very top of this document.
• From Eclipse’s Console Output:
  Start your Tomcat server in Eclipse. Check the Console tab—you’ll see an early log line like INFO: Starting Servlet engine: [Apache Tomcat/9.0.73] that explicitly states the version.

Checking the Java Version Tomcat Uses #

Tomcat relies on the JRE/JDK configured for its server instance in Eclipse. Here’s how to verify which version it’s running with:

• Through Server Configuration:
  1. Open the Servers view in Eclipse (if it’s missing, enable it via Window > Show View > Servers).
  2. Right-click your Tomcat server and select Open.
  3. In the server configuration page, look for the Runtime Environment field. The linked JRE/JDK here is what Tomcat uses—click the JRE name to view its details, which will show the version (e.g., Java SE 17.0.6).
• From Console Output:
  When you start Tomcat, the Console will log the JVM version in a line like INFO: JVM Version: 17.0.6+10-LTS-190.
• Using Tomcat’s Catalina Command:
  Navigate to your Tomcat’s bin folder in a terminal. Run catalina.sh version (Linux/Mac) or catalina.bat version (Windows). This command will print both the Tomcat version and the Java version it’s utilizing.

内容的提问来源于stack exchange，提问作者Ishant Gaurav