Install JDK under Tomcat

Tomcat is a core project of the Apache Software Foundation (Apache Software Foundation) Jakarta Project, developed by Apache, Sun, and other companies and individuals. With Sun's involvement and support, the latest servlet and JSP specifications are always reflected in Tomcat, and Tomcat 5 supports the latest servlet 2.4 and JSP 2.0 specifications. Because of the advanced Tomcat technology, stable performance, and free, so deeply loved by Java enthusiasts and have been recognized by some software developers, become the most popular Web application server.

Tomcat server is a free open source Web application server, belongs to the lightweight application server, in small and medium-sized systems and concurrent access users are not widely used, is the first choice to develop and debug JSP programs. For a beginner, it can be thought that when the Apache server is configured on a single machine, it can respond to requests for access to the HTML (one application under the standard Universal Markup Language) page. The tomcat part is actually an extension of the Apache server, but it runs independently, so when you run Tomcat, it actually runs separately as a separate process from Apache.

1. Download and install Tomcat, based on the Apache protocol

Java and JSP run programs need to use JDK

Install JDK, go to JDK website to download

Http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html

into the SRC directory

Cd/usr/local/src

wget http://download.oracle.com/otn-pub/java/jdk/8u112-b15-demos/jdk-8u112-linux-i586-demos.tar.gz

2. Extracting files

Tar zxvf jdk-8u112-linux-i586-demos.tar.gz

3. Move the extracted files to the/usr/local/

MV jdk1.8.0_112/usr/local/

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4. Setting Environment variables

vim/etc/profile.d/java.sh

Write content

java_home=/usr/local/jdk1.8.0_112/

Java_bin=/usr/local/jdk1.8.0_112/bin

Jre_home=/usr/local/jdk1.8.0_112/jre

Path= $PATH:/usr/local/jdk1.8.0_112/bin:/usr/local/jdk1.8.0_112/jre/bin

classpath=/usr/local/jdk1.8.0_112/jre/lib:/usr/local/jdk1.8.0_112/lib:/usr/local/jdk1.8.0_112/jre/lib/ Charsets.jar

Export Java_home java_bin jre_home PATH CLASSPATH

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5. Initializing Environment variables

source/etc/profile.d/java.sh

6. Verify that it is successful

Java-version

Display as 1.7 version, indicating that the version is not healthy

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View version

Yum List |grep JDK

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Removing version 1.7

Yum-y Remove java-1.7.0-openjdk* java-1.6.0-openjdk*

7. Initializing Environment variables

SOURCE/ETC/PROFILE.D /java.sh

Check for success, display 1.8 version of the information

Java-version

Install JDK under Tomcat