在centos 6.3系统下安装java、tomcat环境的方法与步骤(方法经过验证,可安装成功)
一、安装java
1. 下载java二进制安装包
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F" http://download.oracle.com/otn-pub/java/jdk/6u25-b06/jdk-6u25-linux-x64-rpm.bin
2. 开始安装java
A. 赋予刚才下载的文件执行权限
chmod a+x jdk-6u25-linux-x64-rpm.bin
B. 解包二进制文件
./jdk-6u25-linux-x64-rpm.bin
该二进制文件会解压出若十个bin文件,然后进行自动安装
C. 为JDK文件添加软链接
ln -s /usr/java/jdk1.6.0_25 /usr/local/java
添加后系统就能正确的进行调用,在设置环境变量和编译时也会用到
3. 为JAVA设置环境变量
设置环境变量
vi /etc/profile
末尾增加如下内容
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set JAVA_HOME=/usr/local/java
export JAVA_HOME
set PATH=$JAVA_HOME/bin:$PATH
export PATH
set CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export CLASSPATH
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加载环境变量
source /etc/profile
4. 使用以下命令验证JAVA是否已经安装成功
java -version
如果显示为下面的内容,则表示安装成功
java version "1.6.0_25"
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.0-b11, mixed mode)
二、安装tomcat
1. 下载tomcat源安装包
wget http://apache.etoak.com/tomcat/tomcat-7/v7.0.42/bin/apache-tomcat-7.0.42.tar.gz
2. 解压文件,并且开始安装(绿色安装)
tar -zxvf apache-tomcat-7.0.42.tar.gz mv apache-tomcat-7.0.42 tomcat cp -rf tomcat/ /usr/local/
3. 初始化tomcat的配置
cd /usr/local/tomcat/bin/ vi catalina.sh
在文件的末尾加上
CATALINA_HOME=/usr/local/tomcat/
JAVA_HOME=/usr/local/java
4. 启动tomcat
/usr/local/tomcat/bin/startup.sh
5. 4.查看tomcat启动日志:
cd /usr/local/tomcat/logs/cat catalina.out
-------------------
2013-8-1 3:23:56 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64/server:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
.......
-------------------
发现日志提示缺少ARP模块,google了下,原因是tomcat默认未加载Tomcat Native增强组件
解决方法
a. 安装apr组件:
wget http://archive.apache.org/dist/apr/apr-1.4.6.tar.gz tar zxvf apr-1.4.6.tar.gz cd apr-1.4.6 ./configure --prefix=/usr/local/apr make && make install
b. 安装Tomcat Native模块
cd /usr/local/tomcat/bin/ tar zxvf tomcat-native.tar.gz cd tomcat-native-1.1.27-src/jni/native/ ./configure --with-apr=/usr/local/apr --with-java-home=/usr/local/java make && make install
注:--with-java-home=/usr/local/java对应之前安装JDK的软链路径
c. 加载apr的环境变量,使tomcat加载Tomcat Native组件:
vi /etc/profile
添加如下内容:
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export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/apr/lib
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加载环境变量,使其立即生效
source /etc/profile
d.重启tomcat:
killall java /usr/local/tomcat/bin/catalina.sh start
f.查看端口状态:
lsof -i:8080
注:tomcat默认为8080端口,如果没有安装lsof,可以使用yum install lsof进行安装
------------------------
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 26116 root 40u IPv6 66456 0t0 TCP *:webcache (LISTEN)
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可以看到8080端口是被java占用,这说明tomcat与apache启动成功
5.测试启动页面:
浏览器输入 http://localhost:8080/ ,看到以下界面说明安装成功