Centos配置J2EE环境

步骤一：安装JDK

# cd /usr/java 
# wget --no-check-certificate --no-cookies - --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/7u76-b13/jdk-7u76-linux-x64.rpm -O jdk-7u76-linux-x64.rpm 
[root@VM_49_244_centos java]# rpm -ivh jdk-7u76-linux-x64.rpm
Preparing...                ########################################### [100%]
   1:jdk                    ########################################### [100%]
Unpacking JAR files...
        rt.jar...
        jsse.jar...
        charsets.jar...
        tools.jar...
        localedata.jar...
        jfxrt.jar...
[root@VM_49_244_centos java]# java -version
java version "1.7.0_76"
Java(TM) SE Runtime Environment (build 1.7.0_76-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.76-b04, mixed mode)

步骤二：设置默认JDK

[root@VM_49_244_centos /]# alternatives --install /usr/bin/java java /usr/java/default/bin/java 776
[root@VM_49_244_centos /]# alternatives --config java

There is 1 program that provides 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           /usr/java/default/bin/java

Enter to keep the current selection[+], or type selection number: 1

步骤三：设置环境变量

修改/etc/profile
在末尾加上

export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

步骤四：测试JDK

新建测试文件test.java

public class test{
public static void main(String args[])
{
System.out.println("hello world");
}

测试

[root@VM_49_244_centos]# javac test.java
[root@VM_49_244_centos]# java test
hello world

步骤五：安装Maven

# cd /usr/maven 
# wget http://mirrors.cnnic.cn/apache/maven/maven-3/3.1.1/binaries/apache-maven-3.1.1-bin.zip  
# unzip apache-maven-3.1.1-bin.zip  
# mv apache-maven-3.1.1/ /opt/maven  
# ln -s /opt/maven/bin/mvn /usr/bin/mvn

步骤六：配置环境变量

编辑 /etc/profile
在尾部添加MAVEN_HOME,并在PATH中添加$MAVEN_HOME/bin

export PATH=$JAVA_HOME/bin:$MAVEN_HOME/bin:$PATH
export MAVEN_HOME=/opt/maven

步骤七：测试Maven

[root@VM_49_244_centos ~]# mvn -v
Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 23:22:22+0800)
Maven home: /opt/maven
Java version: 1.7.0_76, vendor: Oracle Corporation
Java home: /usr/java/jdk1.7.0_76/jre
Default locale: en_US, platform encoding: ANSI_X3.4-1968
OS name: "linux", version: "2.6.32-504.30.3.el6.x86_64", arch: "amd64", family: "unix"

步骤八：配置mysql

# yum install -y mysql-server mysql mysql-deve

查看刚安装好的mysql-server的版本

# rpm -qi mysql-server

步骤九：安装Tomcat

#cd /usr/Tomcat
# wget http://http://archive.apache.org/dist/tomcat/tomcat-7/v7.0.68/bin/apache-tomcat-7.0.68.zip

解压后启动Tomcat（__为Tomcat所在路径,本案例为/usr）

# cd __/Tomcat/apache-tomcat-7.0.68/bin/
# startup.sh

步骤十：测试Tomcat

访问 http:\ip:8080，如果出现以下界面则成功：

---

其他事项

事项一：开机自动开启tomcat
编辑 /etc/rc.d/rc.local
加入如下内容（__为Tomcat所在路径,本案例为/usr）

# __/Tomcat/apache-tomcat-7.0.68/bin/startup.sh
```

事项二：开启SSLv3
进入java.security文件（__为java所在路径,本案例为/usr）

# cd __/java/default/jre/lib/security  
# vi java.security

在最后一行jdk.tls.disabledAlgorithms=SSLv3前加上“#”

# jdk.tls.disabledAlgorithms=SSLv3