CentOS 安装jdk1.7 64位

[root@localhost ~]# java -version
java version "1.6.0"
OpenJDK  Runtime Environment (build 1.6.0-b09)
OpenJDK 64-Bit Server VM (build 1.6.0-b09, mixed mode)

1.6的，这个必须换掉 。下载jdk-7u3-linux-x64.rpm

# wget http://download.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.rpm
--2012-02-28 00:13:34--  http://download.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.rpm
正在解析主机 download.oracle.com... 63.97.94.56, 63.97.94.80
Connecting to download.oracle.com|63.97.94.56|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：67667318 (65M) [application/x-redhat-package-manager]
Saving to: `jdk-7u3-linux-x64.rpm'

65% [===============================================>                          ] 44,088,409  50.1K/s  eta 7m 23s  

 速度不咋的，可以用迅雷之类的下了传上去。

运行安装

# rpm -ivh jdk-7u3-linux-x64.rpm 
Preparing...                ########################################### [100%]
   1:jdk                    ########################################### [100%]
Unpacking JAR files...
	rt.jar...
	jsse.jar...
	charsets.jar...
	tools.jar...
	localedata.jar...

 # vim /etc/profile

修改profile 最后面加入

export JAVA_HOME=/usr/java/jdk1.7.0_03
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

 保存退出。运行 #source /etc/profile

之后 运行

# update-alternatives --install /usr/bin/java java /usr/java/jdk1.7.0_03/bin/java 60
# update-alternatives --config java

 你会看到我的ssh中存在乱码。

*+ 1           /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
   2           /usr/lib/jvm/jre-1.4.2-gcj/bin/java
   3           /usr/java/jdk1.7.0_03/bin/java

 输入3 敲回车

然后一切ok

# java -version
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b04)
Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode)