CentOS下安装JDK的三种方法

root@linuxidc:~# apt-get install openjdk-7-jdk

[root@localhost ~]# yum search java|grep jdk
ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk
java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
ldapjdk.x86_64 : The Mozilla LDAP Java SDK

在profile中添加如下内容:

在profile文件中添加如下内容

3.设置环境变量

让修改生效

[root@localhost java]# java -version
java version “1.7.0_79”
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

注:和yum安装类似,不用设置环境变量就可以运行java命令。rpm安装方式默认会把jdk安装到/usr/java/jdk1.7.0_79,然后通过三层链接,链接到/usr/bin,具体链接如下:

[root@localhost ~]# cd /bin
[root@localhost bin]# ll|grep java
lrwxrwxrwx. 1 root root    25 Mar 28 11:24 jar
->/usr/java/default/bin/jar
lrwxrwxrwx. 1 root root    26 Mar 28 11:24 java ->
/usr/java/default/bin/java
lrwxrwxrwx. 1 root root    27 Mar 28 11:24 javac
->/usr/java/default/bin/javac
lrwxrwxrwx. 1 root root    29 Mar 28 11:24 javadoc
->/usr/java/default/bin/javadoc
lrwxrwxrwx. 1 root root    28 Mar 28 11:24 javaws
->/usr/java/default/bin/javaws
lrwxrwxrwx. 1 root root    30 Mar 28 11:24 jcontrol
->/usr/java/default/bin/jcontrol
[root@localhost bin]# cd /usr/java/
[root@localhost java]# ll
total 4
lrwxrwxrwx. 1 root root  16 Mar 28 11:24 default-> /usr/java/latest
drwxr-xr-x. 8 root root 4096 Mar 28 11:24 jdk1.7.0_79
lrwxrwxrwx. 1 root root  21 Mar 28 11:24 latest ->
/usr/java/jdk1.7.0_79

[root@localhost java]# curl -O

[root@localhost java]# tar -zxvf jdk-7u79-linux-x64.tar.gz

3.设置环境变量

[root@localhost java]# source /etc/profile

#set java environment
JAVA_HOME=/usr/java/jdk1.7.0_79
JRE_HOME=/usr/java/jdk1.7.0_79/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

[root@localhost java]# java -version
java version “1.7.0_79”
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

让修改生效

//选择1.7版本进行安装
[root@localhost ~]# yum install java-1.7.0-openjdk
//安装完之后,默认的安装目录是在:
/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64

[root@localhost java]# source /etc/profile

3.设置环境变量

4.验证JDK有效性

2.选择版本,进行安装

在打开的profile文件中添加如下内容

让修改生效

方法三:用rpm安装JDK

#set java environment
JAVA_HOME=/usr/java/jdk1.7.0_79
JRE_HOME=/usr/java/jdk1.7.0_79/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

#set java environment
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64
JRE_HOME=$JAVA_HOME/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

4.验证(同上一方法)

root@linuxidc:~# vi /etc/profile

让修改生效:

4.验证(同上一方法)

root@linuxidc:~# vi /etc/profile

方法四:Ubuntu 上使用apt-get安装JDK

[root@localhost java]# source /etc/profile

root@linuxidc:~# source /etc/profile

[root@localhost ~]$ curl -O

#set java environment
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64
JRE_HOME=$JAVA_HOME/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

1.下载rpm安装文件

方法一:手动解压JDK的压缩包,然后设置环境变量

方法一:手动解压JDK的压缩包,然后设置环境变量

1.查看yum库中都有哪些jdk版本(暂时只发现了openjdk)

root@linuxidc:~# source /etc/profile

注:和yum安装类似,不用设置环境变量就可以运行java命令。rpm安装方式默认会把jdk安装到/usr/java/jdk1.7.0_79,然后通过三层链接,链接到/usr/bin,具体链接如下:

2.使用rpm命令安装

2.使用rpm命令安装

[root@localhost ~]# cd /bin
[root@localhost bin]# ll|grep java
lrwxrwxrwx. 1 root root     25 Mar 28 11:24 jar
->/usr/java/default/bin/jar
lrwxrwxrwx. 1 root root     26 Mar 28 11:24 java ->
/usr/java/default/bin/java
lrwxrwxrwx. 1 root root     27 Mar 28 11:24 javac
->/usr/java/default/bin/javac
lrwxrwxrwx. 1 root root     29 Mar 28 11:24 javadoc
->/usr/java/default/bin/javadoc
lrwxrwxrwx. 1 root root     28 Mar 28 11:24 javaws
->/usr/java/default/bin/javaws
lrwxrwxrwx. 1 root root     30 Mar 28 11:24 jcontrol
->/usr/java/default/bin/jcontrol
[root@localhost bin]# cd /usr/java/
[root@localhost java]# ll
total 4
lrwxrwxrwx. 1 root root   16 Mar 28 11:24 default->
/usr/java/latest
drwxr-xr-x. 8 root root 4096 Mar 28 11:24 jdk1.7.0_79
lrwxrwxrwx. 1 root root   21 Mar 28 11:24 latest ->
/usr/java/jdk1.7.0_79

[root@localhost ~]# yum search java|grep jdk
ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk
java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
ldapjdk.x86_64 : The Mozilla LDAP Java SDK

2.选择版本,进行安装

[root@localhost java]# vi /etc/profile

[root@localhost  ~]# rpm -ivh jdk-7u79-linux-x64.rpm

让修改生效

方法二:用yum安装JDK

[root@localhost java]# vi /etc/profile

//选择1.7版本进行安装
[root@localhost ~]# yum install java-1.7.0-openjdk
//安装完之后,默认的安装目录是在:
/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64

方法三:用rpm安装JDK

让修改生效

4.验证JDK有效性

在打开的profile文件中添加如下内容

root@linuxidc:~# apt-cache search java|grep jdk
default-jdk – Standard Java or Java compatible Development Kit
default-jdk-doc – Standard Java or Java compatible Development Kit
(documentation)
gcj-4.6-jdk – gcj and classpath development tools for Java(TM)
gcj-jdk – gcj and classpath development tools for Java(TM)
openjdk-6-dbg – Java runtime based on OpenJDK (debugging symbols)
openjdk-6-demo – Java runtime based on OpenJDK (demos and examples)
openjdk-6-doc – OpenJDK Development Kit (JDK) documentation
openjdk-6-jdk – OpenJDK Development Kit (JDK)
openjdk-6-jre-lib – OpenJDK Java runtime (architecture independent
libraries)
openjdk-6-source – OpenJDK Development Kit (JDK) source files
openjdk-7-dbg – Java runtime based on OpenJDK (debugging symbols)
openjdk-7-demo – Java runtime based on OpenJDK (demos and examples)
openjdk-7-doc – OpenJDK Development Kit (JDK) documentation
openjdk-7-jdk – OpenJDK Development Kit (JDK)
openjdk-7-source – OpenJDK Development Kit (JDK) source files
uwsgi-plugin-jvm-openjdk-6 – Java plugin for uWSGI (OpenJDK 6)
uwsgi-plugin-jwsgi-openjdk-6 – JWSGI plugin for uWSGI (OpenJDK 6)
openjdk-6-jre – OpenJDK Java runtime, using Hotspot JIT
openjdk-6-jre-headless – OpenJDK Java runtime, using Hotspot JIT
(headless)
openjdk-7-jre – OpenJDK Java runtime, using Hotspot JIT
openjdk-7-jre-headless – OpenJDK Java runtime, using Hotspot JIT
(headless)
openjdk-7-jre-lib – OpenJDK Java runtime (architecture independent
libraries)

让修改生效

4.验证(同上一方法)

3.设置环境变量

[root@localhost ~]# mkdir/usr/java
[root@localhost ~]# cd /usr/java

4.验证(同上一方法)

#set java environment
JAVA_HOME=/usr/java/jdk1.7.0_79
JRE_HOME=/usr/java/jdk1.7.0_79/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

[root@localhost java]# vi /etc/profile

[root@localhost java]# source /etc/profile

在profile文件中添加如下内容

2.选择版本进行安装

[root@localhost ~]$ curl -O

2.下载jdk,然后解压

3.设置环境变量

在profile中添加如下内容:

2.选择版本进行安装

在打开的profile文件中添加如下内容

[root@localhost java]# source /etc/profile

方法四:Ubuntu
上使用apt-get安装JDK

让修改生效:

 

[root@localhost java]# source /etc/profile

在打开的profile文件中添加如下内容

1.下载rpm安装文件

3.设置环境变量

root@linuxidc:~# apt-cache search java|grep jdk
default-jdk – Standard Java or Java compatible Development Kit
default-jdk-doc – Standard Java or Java compatible Development Kit
(documentation)
gcj-4.6-jdk – gcj and classpath development tools for Java(TM)
gcj-jdk – gcj and classpath development tools for Java(TM)
openjdk-6-dbg – Java runtime based on OpenJDK (debugging symbols)
openjdk-6-demo – Java runtime based on OpenJDK (demos and examples)
openjdk-6-doc – OpenJDK Development Kit (JDK) documentation
openjdk-6-jdk – OpenJDK Development Kit (JDK)
openjdk-6-jre-lib – OpenJDK Java runtime (architecture independent
libraries)
openjdk-6-source – OpenJDK Development Kit (JDK) source files
openjdk-7-dbg – Java runtime based on OpenJDK (debugging symbols)
openjdk-7-demo – Java runtime based on OpenJDK (demos and examples)
openjdk-7-doc – OpenJDK Development Kit (JDK) documentation
openjdk-7-jdk – OpenJDK Development Kit (JDK)
openjdk-7-source – OpenJDK Development Kit (JDK) source files
uwsgi-plugin-jvm-openjdk-6 – Java plugin for uWSGI (OpenJDK 6)
uwsgi-plugin-jwsgi-openjdk-6 – JWSGI plugin for uWSGI (OpenJDK 6)
openjdk-6-jre – OpenJDK Java runtime, using Hotspot JIT
openjdk-6-jre-headless – OpenJDK Java runtime, using Hotspot JIT
(headless)
openjdk-7-jre – OpenJDK Java runtime, using Hotspot JIT
openjdk-7-jre-headless – OpenJDK Java runtime, using Hotspot JIT
(headless)
openjdk-7-jre-lib – OpenJDK Java runtime (architecture independent
libraries)

[root@localhost  ~]# rpm -ivh jdk-7u79-linux-x64.rpm

1.在/usr/目录下创建java目录

#set java environment
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64
JRE_HOME=$JAVA_HOME/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

2.下载jdk,然后解压

3.设置环境变量

[root@localhost java]# vi /etc/profile

方法二:用yum安装JDK

4.验证(同上一方法)

1.查看yum库中都有哪些jdk版本(暂时只发现了openjdk)

[root@localhost ~]# mkdir/usr/java
[root@localhost ~]# cd /usr/java

3.设置环境变量

#set java environment
JAVA_HOME=/usr/java/jdk1.7.0_79
JRE_HOME=/usr/java/jdk1.7.0_79/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

1.查看apt库都有哪些jdk版本

1.查看apt库都有哪些jdk版本

由于各Linux开发厂商的不同,因此不同开发厂商的Linux版本操作细节也不一样,今天就来说一下CentOS下JDK的安装:

[root@localhost ~]# vi /etc/profile

root@linuxidc:~# apt-get install openjdk-7-jdk

由于各Linux开发厂商的不同,因此不同开发厂商的Linux版本操作细节也不一样,今天就来说一下CentOS下JDK的安装:

1.在/usr/目录下创建java目录

[root@localhost java]# curl -O
 
[root@localhost java]# tar -zxvf jdk-7u79-linux-x64.tar.gz

[root@localhost ~]# vi /etc/profile

#set java environment
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64
JRE_HOME=$JAVA_HOME/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH