In this turorial, we will find out about how to configure Tomcat in eclipse, and how to configure Tomcat to deploy web application.
Table of contents
- Introduction to Tomcat
- Configure Tomcat in Eclipse
- Configure Tomcat server to deploy web application
- Understanding about some configuration files in Tomcat
- Some errors in Eclipse when configure Tomcat
- Wrapping up
Introduction to Tomcat
Tomcat is actually composed of a number of components, including a Tomcat JSP engine and other connectors, but the main component is Catalina, which provides the implementation of the servlet specification. When starting the Tomcat server, it’s Catalina that is actually starting. The variable CATALINA_HOME
is a configuration property that stores the location of the Catalina files.
These are the configuration files in Tomcat’s CATALINA_BASE/conf
directory:
- catalina.policy
- catalina.properties
- logging.properties
- content.xml
- server.xml
- tomcat-users.xml
- web.xml
Configure Tomcat in Eclipse
-
The first thing we have to do is to download
Apache Tomcat
in a link such as https://tomcat.apache.org/download-90.cgi. -
Unzip this file and we have;
-
This step we will add Tomcat into our Eclipse:
And click
Apply and Close
to agree our Tomcat version.
Configure Tomcat server to deploy web application
After we unzip Tomcat file, we will do something like:
- specify JDK for Tomcat.
-
Open
startup.bat
file inbin
folder of Tomcat. (With Linux/Ubuntu OS, we havestartup.sh
file). -
We will add some code into
startup.bat
file.# With Windows set JAVA_HOME="C:\Program Files\Java\jdk1.8.0_181" # With Linux/Ubuntu JAVA_HOME="/usr/lib/jvm/open-jdk"
-
Next, we will configure for account to use Tomcat. Open
tomcat-users.xml
inconf
folder.Tomcat was defined 4 roles:
manager-gui
- allows access to the HTML GUI and the status pagesmanager-script
- allows access to the text interface and the status pagesmanager-jmx
- allows access to the JMX proxy and the status pagesmanager-status
- allows access to the status pages only
We can declare a user with 4 roles
<role rolename="manager-gui"/> <role rolename="manager-script"/> <role rolename="manager-jmx"/> <role rolename="manager-status"/> <user username="tomcat" password="mypassword" roles="manager-gui,manager-script,manager-jmx,manager-status"/>
-
To run Tomcat, we double click into
startup.bat
file. (orstartup.sh
file if we use Linux/Ubuntu). -
On browser, we type
localhost:8080
. -
With Tomcat, we have authenticate
username
/password
that we write intomcat-users.xml
file. -
In Tomcat, we have
/manager
(Tomcat Manager Application) is the most important. It will help us to manage Tomcat, and we can access it with following path:localhost:8080/manager
. -
In order to deploy web application to Tomcat, we can do the following image.
-
After that, demo application will be deployed to Tomcat.
-
Run demo application, we have:
Some errors in Eclipse when configure Tomcat
-
WARNING: Unable to load server configuration from ... server.xml
We only need to copy a path
E:\apache-tomcat-9.0.16\conf
into our path where has error. -
Getting 404 - Page not found error
We can solve this error that follows some steps:
-
Step 1
- Go to Eclipse IDE
- Click on Servers Tab
-
Double click on Tomcat v9.0 Server at localhost
-
Step 2
- New Apache Tomcat configuration page will open
- Go to
Server Location
section -
Select
Use Tomcat installation
(takes control of Tomcat installation)
-
Step 3
- Save configuration
Restart
Server by right clicking on tomcat server and clickRestart
-
Visit
http://localhost:8080
again and now you should see working tomcat page
-
Wrapping up
Refer:
https://o7planning.org/vi/11583/cai-dat-va-cau-hinh-tomcat-server