CentOS上yum安装 jdk

1.查找java相关得列表

[qyf@localhost ~]$ yum -y listjava*

执行结果

[qyf@localhost ~]$ yum -y listjava*

Loaded plugins:fastestmirror

base | 1.1 kB 00:00

base/primary | 995 kB00:00

base 2789/2789

extras | 2.1 kB 00:00

extras/primary_db | 164 kB00:20

updates | 1.9 kB 00:00

updates/primary_db | 422 kB00:01

Available Packages

java-1.4.2-gcj-compat.i386 1.4.2.0-40jpp.115base

java-1.4.2-gcj-compat-devel.i3861.4.2.0-40jpp.115 base

java-1.4.2-gcj-compat-javadoc.i3861.4.2.0-40jpp.115 base

java-1.4.2-gcj-compat-src.i3861.4.2.0-40jpp.115 base

java-1.6.0-openjdk.i3861:1.6.0.0-5.1.13.3.el5_10 updates

java-1.6.0-openjdk-demo.i3861:1.6.0.0-5.1.13.3.el5_10 updates

java-1.6.0-openjdk-devel.i3861:1.6.0.0-5.1.13.3.el5_10 updates

java-1.6.0-openjdk-javadoc.i3861:1.6.0.0-5.1.13.3.el5_10 updates

java-1.6.0-openjdk-src.i3861:1.6.0.0-5.1.13.3.el5_10 updates

java-1.7.0-openjdk.i3861:1.7.0.55-2.4.7.1.el5_10 updates

java-1.7.0-openjdk-demo.i3861:1.7.0.55-2.4.7.1.el5_10 updates

java-1.7.0-openjdk-devel.i3861:1.7.0.55-2.4.7.1.el5_10 updates

java-1.7.0-openjdk-javadoc.i3861:1.7.0.55-2.4.7.1.el5_10 updates

java-1.7.0-openjdk-src.i3861:1.7.0.55-2.4.7.1.el5_10 updates

java_cup.i386 1:0.10-0.k.6jpp.1base

java_cup-javadoc.i386 1:0.10-0.k.6jpp.1base

java_cup-manual.i386 1:0.10-0.k.6jpp.1base

javacc.i386 4.0-3jpp.3base

javacc-demo.i386 4.0-3jpp.3base

javacc-manual.i386 4.0-3jpp.3base

2.使用root用户安装

安装时提醒必须使用root用户，sudo都不行。

[qyf@localhost ~]$ yum -y installjava-1.6.0-openjdk*

执行结果

[qyf@localhost ~]$ yum -y installjava-1.6.0-openjdk*

Loaded plugins:fastestmirror

Loading mirror speeds from cachedhostfile

* base: mirror.bit.edu.cn

* extras:mirror.bit.edu.cn

* updates:centos.ustc.edu.cn

base | 1.1 kB 00:00

base/primary | 995 kB00:07

base 2789/2789

extras | 2.1 kB 00:00

extras/primary_db | 164 kB00:02

updates | 1.9 kB 00:00

updates/primary_db | 422 kB00:07

Setting up Install Process

Resolving Dependencies

--> Running transactioncheck

---> Package java-1.6.0-openjdk.i3861:1.6.0.0-5.1.13.3.el5_10 set to be updated

--> Processing Dependency: jpackage-utils>= 1.7.3-1jpp.2 for package:java-1.6.0-openjdk

--> Processing Dependency: libgif.so.4 forpackage: java-1.6.0-openjdk

--> Processing Dependency: tzdata-java forpackage: java-1.6.0-openjdk

---> Package java-1.6.0-openjdk-demo.i3861:1.6.0.0-5.1.13.3.el5_10 set to be updated

---> Package java-1.6.0-openjdk-devel.i3861:1.6.0.0-5.1.13.3.el5_10 set to be updated

---> Packagejava-1.6.0-openjdk-javadoc.i386 1:1.6.0.0-5.1.13.3.el5_10 set to beupdated

---> Package java-1.6.0-openjdk-src.i3861:1.6.0.0-5.1.13.3.el5_10 set to be updated

--> Running transactioncheck

---> Package giflib.i386 0:4.1.3-7.3.3.el5set to be updated

---> Package jpackage-utils.noarch0:1.7.3-1jpp.3.el5 set to be updated

---> Package tzdata-java.i386 0:2014b-1.el5set to be updated

--> Finished DependencyResolution

Dependencies Resolved

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

Package Arch VersionRepository

Size

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

Installing:

java-1.6.0-openjdk i3861:1.6.0.0-5.1.13.3.el5_10 updates 44 M

java-1.6.0-openjdk-demo i3861:1.6.0.0-5.1.13.3.el5_10 updates 2.2 M

java-1.6.0-openjdk-devel i3861:1.6.0.0-5.1.13.3.el5_10 updates 15 M

java-1.6.0-openjdk-javadoc i3861:1.6.0.0-5.1.13.3.el5_10 updates 20 M

java-1.6.0-openjdk-src i3861:1.6.0.0-5.1.13.3.el5_10 updates 39 M

Installing fordependencies:

giflib i386 4.1.3-7.3.3.el5 base 39k

jpackage-utils noarch 1.7.3-1jpp.3.el5 base 60k

tzdata-java i386 2014b-1.el5 updates 172k

Transaction Summary

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

Install 8 Package(s)

Upgrade 0 Package(s)

Total download size: 120 M

Downloading Packages:

(1/8): giflib-4.1.3-7.3.3.el5.i386.rpm | 39 kB00:00

(2/8):jpackage-utils-1.7.3-1jpp.3.el5.noarch.rpm | 60 kB00:00

(3/8): tzdata-java-2014b-1.el5.i386.rpm | 172kB 00:04

(4/8):java-1.6.0-openjdk-demo-1.6.0.0-5.1.13.3.el5_10.i386.rpm | 2.2 MB00:47

(5/8):java-1.6.0-openjdk-devel-1.6.0.0-5.1.13.3.el5_10.i386.rpm | 15 MB04:25

(6/8):java-1.6.0-openjdk-javadoc-1.6.0.0-5.1.13.3.el5_10.i386.rpm (17%)19% [============ ] 81 kB/s | 3.8 MB 03:19 ETA

最后一行就是在下载jdk了，这里我们安装jdk1.6相关得全部包。

3.确认是否安装成功

[qyf@localhost ~]$ java-version

执行结果

[qyf@localhost ~]$ java-version

java version "1.6.0_30"

OpenJDK Runtime Environment (IcedTea6 1.13.3)(rhel-5.1.13.3.el5_10-i386)

OpenJDK Client VM (build 23.25-b01, mixedmode)

正确显示了jdk版本信息就说明安装成功了。

4.默认情况下jdk安装得路径

/usr/lib/jvm

由于我们得机器可能同时安装好几个版本得jdk，所以在/etc/alternatives目录下会有一个java链接到具体的java命令。而这个/etc/alternatives/java会被/usr/bin/java链接。从而java命令就被设置到了shell环境中。