linux下安装jdk1.7

最经公司需要在linux上开发、需要在linux系统上面搭建开发环境，倒腾了半个小时算是弄好了jdk的安装，写个博客记下来吧。

首先先检查linux机器上是否有自带的jdk

java -version检查下就可以，如果有版本低的话可以先卸载掉方法如下

[root@localhost java]# rpm -qa|grep gcj 或者 rpm -qa|grep java

libgcj-4.1.2-44.el5

java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

如果没有信息就是没有安装、如果有那么如下操作

[root@localhost jdk-6u13-linux-i586]# yum -y remove java-1.4.2-gcj-compat-1.4.2.0-40jpp.115 或者 rpm -e --nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

Loaded plugins: rhnplugin, security

This system is not registered with RHN.

RHN support will be disabled.

Setting up Remove Process

Resolving Dependencies

--> Running transaction check

---> Package java-1.4.2-gcj-compat.i386 0:1.4.2.0-40jpp.115 set to be erased

--> Processing Dependency: java-gcj-compat for package: antlr

--> Processing Dependency: java-gcj-compat for package: antlr

--> Processing Dependency: java-gcj-compat >= 1.0.64 for package: gjdoc

--> Processing Dependency: java-gcj-compat >= 1.0.64 for package: gjdoc

--> Running transaction check

---> Package antlr.i386 0:2.7.6-4jpp.2 set to be erased

---> Package gjdoc.i386 0:0.7.7-12.el5 set to be erased

--> Finished Dependency Resolution

Dependencies Resolved

================================================================================

Package Arch Version Repository Size

================================================================================

Removing:

java-1.4.2-gcj-compat i386 1.4.2.0-40jpp.115 installed 441

Removing for dependencies:

antlr i386 2.7.6-4jpp.2 installed 2.5 M

gjdoc i386 0.7.7-12.el5 installed 1.7 M

Transaction Summary

================================================================================

Install 0 Package(s)

Update 0 Package(s)

Remove 3 Package(s)

Downloading Packages:

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Erasing : antlr [1/3]

Erasing : gjdoc [2/3]

Erasing : java-1.4.2-gcj-compat [3/3]

Removed: java-1.4.2-gcj-compat.i386 0:1.4.2.0-40jpp.115

Dependency Removed: antlr.i386 0:2.7.6-4jpp.2 gjdoc.i386 0:0.7.7-12.el5

Complete!(看到这个说明完成了。。)

接着我们手动安装linux的jdk我的

下载地址

http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html

我下载的是rpm包

接着执行安装

[root@localhost local]#
rpm -ivh jdk-7-linux-i586.rpm

Preparing... ########################################### [100%]

1:jdk ########################################### [100%]

Unpacking JAR files...

rt.jar...

jsse.jar...

charsets.jar...

tools.jar...

localedata.jar...

plugin.jar...

javaws.jar...

deploy.jar...

我的rpm包就这样就装好了。。

接着是配置环境变量

#vi /etc/profile

在该profile文件中最下面添加：

JAVA_HOME=/usr/java/jdk1.7.0//自己的jdk路径

JRE_HOME=/usr/java/jdk1.7.0/jre

PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

CLASSPATH=.:$JAVA_HOME/lib/jt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

export JAVA_HOME JRE_HOME PATH CLASSPATH

添加完毕保存退出

source /etc/profile

[root@localhost jdk1.7.0]# java -version

java version "1.7.0"

Java(TM) SE Runtime Environment (build 1.7.0-b147)

Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing)

[root@localhost jdk1.7.0]# echo $JAVA_HOME

/usr/java/jdk1.7.0

这个时候就大功告成了