Deploying Java Services on CentOS

First step: Uninstall the JDK from the old Linux

① viewing native JDK versions

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1. Java-version

The results are as follows

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1. Java version "1.6.0"
2. OpenJDK Runtime Environment (build 1.6. 0-B09)
3. OpenJDK 64-bit Server VM (build 1.6. 0-B09, Mixed mode)

② Uninstall the OpenJDK that comes with the machine and install Sun's JDK.

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1. Rpm-qa | grep java

The following information is displayed:

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1. java-1.4. 2-gcj-compat-1.4. 2.0-40JPP. the
2. java-1.6. 0-openjdk-1.6. 0.0-1.7.b09.el5

Unloading:

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1. RPM-E--nodeps java-1.4. 2-gcj-compat-1.4. 2.0-40JPP. the
2. Rpm-e--nodeps java-1.6. 0-openjdk-1.6. 0.0-1.7.b09.el5

If OpenJDK source cannot be found, you can also uninstall this

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1. Yum-y remove Java java-1.4. 2-gcj-compat-1.4. 2.0-40JPP. the
2. Yum-y Remove Java java-1.6. 0-openjdk-1.6. 0.0-1.7.b09.el5

Step Two: Install the JDK

http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase6-419409.html (JDK download)

① download Jdk-1_5_0_14-linux-i586-rpm.bin or Jdk-1_5_0_14-linux-i586.bin from Sun
Create a new Java folder under/usr and place the installation package in the/usr/java directory

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1. Mkdir/usr/java

② Installing the JDK

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1. # Cd/usr/java

If the Jdk-1_5_0_14-linux-i586-rpm.bin file is installed

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1. # chmod 777 jdk-1_5_0_14-linux-i586-rpm.bin← modified to executable
2. #./jdk-1_5_0_14-linux-i586-rpm.bin← Select Yes to agree to the above agreement
3. # RPM-IVH jdk-1_5_0_14-linux-i586.rpm← Select Yes until installation is complete

If the. bin file is installed

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1. # chmod a+x jdk-1_5_0_14-linux-i586.bin← enables the current user to have Execute permissions
2. #./jdk-1_5_0_14-linux-i586.bin← Select Yes until installation is complete

(Refer to Blog http://johnsz.blog.51cto.com/525379/694052)

Step Three: Configure environment variables

①# Vi/etc/profile
② Add the following lines at the end:

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1. Export JAVA_HOME=/USR/JAVA/JDK1. 6.0_10
2. Export classpath=.: $JAVA _home/jre/lib/rt.jar: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar
3. Export path= $PATH: $JAVA _home/bin

③# reboot← Restart machine configuration effective

Fourth step: Turn off the firewall or add ports

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1. Vi/etc/sysconfig/iptables Open the configuration file by adding the following statement:
2. -A input-p tcp-m state--state new-m TCP--dport 8080-j ACCEPT
3. Restarting the firewall
4. /etc/init.d/iptables restart
5. View port Status
6. /etc/init.d/iptables status

(Refer to Blog http://blog.csdn.net/you_jinjin/article/details/7262461)

Fifth step: Project Packaging operation

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1. Java-jar Projectname.jar

Sixth step: Suspend the process in the background

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1. Nohup Java-jar Projectname.jar

After running, the program creates a log file in the same directory as the jar file, records the console display information, and closes the command-line window, and the service continues to run.

(Refer to Blog http://303i.com/article/2013/11/10/1111.html)

Deploying Java Services on CentOS