CentOS上安装JDK1.7 + Tomcat7

1.在centos上卸载已有的java环境

rpm -qa | grep ‘java|gcj’ | xargs -t -I {} rpm -e --nodeps {}

2.安装JDK1.7

从Oracle网站下载jdk-7u80-linux-x64.tar.gz，拷贝到centos上，并在centos上安装
tar xzf jdk-7u80-linux-x64.tar.gz

mv jdk1.7.0_80  /usr/lib/jvm/

配置环境

update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_80/bin/java 300
update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_80/bin/javac 300

vi ~/.bash_profile

export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_80

export JRE_HOME=/usr/lib/jvm/jdk1.7.0_80/jre

export CLASSPATH=.:$JAVA_HOME/bin/dt.jar:$JAVA_HOME/lib/tools.jar:$CLASSPATH

export PATH=$JAVA_HOME/bin/:$PATH:$HOME/bin
3.安装Tomcat并配置自动启动

tar xzf apache-tomcat-7.0.63.tar.gz
mv apache-tomcat-7.0.63 /usr/local/tomcat7
useradd -d /usr/share/tomcat7 tomcat7
chown -R tomcat7:tomcat7 /usr/local/tomcat7
cd /usr/local/tomcat7/bin/
tar xzf commons-daemon-native.tar.gz
cd commons-daemon-1.0.15-native-src/unix/
yum -y install gcc-c++
./configure --with-java=/usr/lib/jvm/jdk1.7.0_80
make
cp jsvc ../..
cd ../..
ln -s /usr/local/tomcat7/bin/daemon.sh /etc/init.d/tomcat7

vim daemon.sh

#!/bin/sh
#
# chkconfig: - 80 20                         

#

# Licensed to the Apache Software Foundation (ASF) under one or more

JAVA_HOME=/usr/lib/jvm/jdk1.7.0_80
CATALINA_HOME=/usr/local/tomcat7
TOMCAT_USER=tomcat7

#如果需要配置jpda端口，需要反注释下方代码，并在

start）分支下，CATALINA_OPTS后面添加$JPDA_OPTS，类似 "$LOGGING_CONFIG" $JAVA_OPTS $CATALINA_OPTS $JPDA_OPTS\
#JPDA_OPTS="-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n"

修改ARG0的值为如下：

ARG0="$CATALINA_HOME"

chkconfig tomcat7 on

chkconfig --list tomcat7

设置JVM参数：

cd /usr/local/tomcat7/bin

vim setenv.sh

#!/bin/sh
JAVA_OPTS="$JAVA_OPTS -Xms6g -Xmx6g -Xmn2g -Xss1024K -XX:PermSize=256M -XX:MaxPermSize=1g -Djava.awt.headless=true -XX:UseG1GC"

chmod +x setenv.sh

重启tomcat7即可生效

service tomcat7 stop

service tomcat7 start