问题
I have a web application in java 6 byte code and would like to test it in a Java 7 JVM environmment. For that purpose, I would like to configure Tomcat (for running the web application) to use Java 7. Now my question is how to do this?
Do I just set my JAVA_HOME environment variable to the path where Java 7 is installed, so that tomcat is run in the right JVM (Version 7)? Or is there another way to do this?
回答1:
You answered your own question.! :)
All You need to do is link java 7 in your JAVA_HOME.!
More Info Here
Edit : (Based on alfabravo's comment :
You can definitely change the pointer to JAVA_HOME in your catalina.bat/sh
回答2:
If you're using Windows, this helps. Run Tomcat helper app (tomcatw.exe) and simply configure Java Virtual Machine DLL path under Java tab. Use default must be unchecked.
回答3:
In Eclipse it is very easy to point Tomcat to a new JVM (in this example JDK7). My problem was I couldn't find where to do it. Here is the trick:
- On the ECLIPSE top menu FILE pull down tab, select NEW, -->Other
- ...on the New Server: Select A Wizard window, select: Server-> Server... click NEXT
- . on the New Server: Define a New Server window, select Apache> Tomcat 7 Server
- ..now click the line in blue and underlined entitled: Configure Runtime Environments
- on the Server Runtime Environments window,
- ..select Apache, expand it(click on the arrow to the left), select TOMCAT v7.0, and click EDIT.
- you will see a window called EDIT SERVER RUNTIME ENVIRONMENT: TOMCAT SERVER
- On this screen there is a pulldown labeled JREs.
- You should find your JRE listed like JDK1.7.0. If not use the Installed JRE button.
- Select the desired JRE. Click the FINISH button.
- Gracefully exit, in the Server: Server Runtime Environments window, click OK
- in the New Server: Define a new Server window, hit NEXT
- in the New Server: Add and Remove Window, select apps and install them on the server.
- in the New Server: Add and Remove Window, click Finish
Thats all. Interesting, only steps 7-10 seem to matter, and they will change the JRE used on all servers you have previously defined to use TOMCAT v7.0. The rest of the steps are just because I can't find any other way to get to the screen except by defining a new server. Does anyone else know an easier way?
TA, Jalkin
回答4:
I had installed it via
sudo apt-get install tomcat7
Setting up JAVA_HOME or PATH did not help me. I had to add entry in file- /etc/default/tomcat7
# Run Tomcat as this user ID. Not setting this or leaving it blank will use the
# default of tomcat7.
TOMCAT7_USER=tomcat7
# Run Tomcat as this group ID. Not setting this or leaving it blank will use
# the default of tomcat7.
TOMCAT7_GROUP=tomcat7
# The home directory of the Java development kit (JDK). You need at least
# JDK version 1.5. If JAVA_HOME is not set, some common directories for
# OpenJDK, the Sun JDK, and various J2SE 1.5 versions are tried.
#JAVA_HOME=/usr/lib/jvm/openjdk-6-jdk
JAVA_HOME=/usr/lib/jvm/java-8-oracle
...
This is Java 8 but you get the point.
回答5:
Go to tomcat/bin and modify the JAVA_HOME parmater in catalina.sh (for linux/unix) or catalina.bat (for windows). This means that only tomcat jvm will change, not everything else.
回答6:
Tomcat's home page states that
Tomcat requires a JDK (version 1.6 or later) to be installed. The Sun JDK can be downloaded here.
IMPORTANT: Set an environment variable JAVA_HOME to the pathname of the directory into which you installed the JDK release.
So basically you're correct. Still there might be some compatibility issues. I recommend you read this article for a detailed discussion about Tomcat and Java 7.
回答7:
Just Open the existing tomcat server and open Runtime Environment and check the JDK Version and change it java 7 JDK Config Changes
来源：https://stackoverflow.com/questions/11000497/how-to-configure-tomcat-to-use-java-7