CentOS下安裝JDK的三種方法

標籤：

由於各Linux開發廠商的不同,因此不同開發廠商的Linux版本操作細節也不一樣,今天就來說一下CentOS下JDK的安裝:

方法一：手動解壓JDK的壓縮包，然後設定環境變數

1.在/usr/目錄下建立java目錄

[[email protected] ~]# mkdir/usr/java[[email protected] ~]# cd /usr/java

2.下載jdk,然後解壓

[[email protected] java]# curl -O http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz [[email protected] java]# tar -zxvf jdk-7u79-linux-x64.tar.gz

3.設定環境變數

[[email protected] java]# vi /etc/profile

在profile中添加如下內容:

#set java environmentJAVA_HOME=/usr/java/jdk1.7.0_79JRE_HOME=/usr/java/jdk1.7.0_79/jreCLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libPATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binexport JAVA_HOME JRE_HOME CLASS_PATH PATH

讓修改生效:

[[email protected] java]# source /etc/profile

4.驗證JDK有效性

[[email protected] java]# java -versionjava 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)

方法二：用yum安裝JDK

1.查看yum庫中都有哪些jdk版本(暫時只發現了openjdk)

[[email protected] ~]# yum search java|grep jdkldapjdk-javadoc.x86_64 : Javadoc for ldapjdkjava-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.6.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentationjava-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.7.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundleldapjdk.x86_64 : The Mozilla LDAP Java SDK

2.選擇版本,進行安裝

//選擇1.7版本進行安裝[[email protected] ~]# yum install java-1.7.0-openjdk
//安裝完之後，預設的安裝目錄是在: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64

3.設定環境變數

[[email protected] ~]# vi /etc/profile

在profile檔案中添加如下內容

#set java environmentJAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64JRE_HOME=$JAVA_HOME/jreCLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libPATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binexport JAVA_HOME JRE_HOME CLASS_PATH PATH

讓修改生效

[[email protected] java]# source /etc/profile

4.驗證(同上一方法)

方法三：用rpm安裝JDK

1.下載rpm安裝檔案

[[email protected] ~]$ curl -O http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.rpm

2.使用rpm命令安裝

[[email protected]  ~]# rpm -ivh jdk-7u79-linux-x64.rpm

3.設定環境變數

[[email protected] java]# vi /etc/profile

在開啟的profile檔案中添加如下內容

#set java environmentJAVA_HOME=/usr/java/jdk1.7.0_79JRE_HOME=/usr/java/jdk1.7.0_79/jreCLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libPATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binexport JAVA_HOME JRE_HOME CLASS_PATH PATH

讓修改生效

[[email protected] java]# source /etc/profile

4.驗證(同上一方法)

注:和yum安裝類似，不用設定環境變數就可以運行java命令。rpm安裝方式預設會把jdk安裝到/usr/java/jdk1.7.0_79，然後通過三層連結，連結到/usr/bin,具體連結如下：

[[email protected] ~]# cd /bin[[email protected] bin]# ll|grep javalrwxrwxrwx. 1 root root     25 Mar 28 11:24 jar ->/usr/java/default/bin/jarlrwxrwxrwx. 1 root root     26 Mar 28 11:24 java -> /usr/java/default/bin/javalrwxrwxrwx. 1 root root     27 Mar 28 11:24 javac ->/usr/java/default/bin/javaclrwxrwxrwx. 1 root root     29 Mar 28 11:24 javadoc ->/usr/java/default/bin/javadoclrwxrwxrwx. 1 root root     28 Mar 28 11:24 javaws ->/usr/java/default/bin/javawslrwxrwxrwx. 1 root root     30 Mar 28 11:24 jcontrol ->/usr/java/default/bin/jcontrol[[email protected] bin]# cd /usr/java/[[email protected] java]# lltotal 4lrwxrwxrwx. 1 root root   16 Mar 28 11:24 default-> /usr/java/latestdrwxr-xr-x. 8 root root 4096 Mar 28 11:24 jdk1.7.0_79lrwxrwxrwx. 1 root root   21 Mar 28 11:24 latest -> /usr/java/jdk1.7.0_79

方法四：Ubuntu 上使用apt-get安裝JDK

1.查看apt庫都有哪些jdk版本

[email protected]:~# apt-cache search java|grep jdkdefault-jdk - Standard Java or Java compatible Development Kitdefault-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) documentationopenjdk-6-jdk - OpenJDK Development Kit (JDK)openjdk-6-jre-lib - OpenJDK Java runtime (architecture independent libraries)openjdk-6-source - OpenJDK Development Kit (JDK) source filesopenjdk-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) documentationopenjdk-7-jdk - OpenJDK Development Kit (JDK)openjdk-7-source - OpenJDK Development Kit (JDK) source filesuwsgi-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 JITopenjdk-6-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)openjdk-7-jre - OpenJDK Java runtime, using Hotspot JITopenjdk-7-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries)

2.選擇版本進行安裝

[email protected]:~# apt-get install openjdk-7-jdk

3.設定環境變數

[email protected]:~# vi /etc/profile

在開啟的profile檔案中添加如下內容

#set java environmentJAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64JRE_HOME=$JAVA_HOME/jreCLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libPATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binexport JAVA_HOME JRE_HOME CLASS_PATH PATH

讓修改生效

[email protected]:~# source /etc/profile

4.驗證(同上一方法)

CentOS下安裝JDK的三種方法