CentOS下安装JDK的三种方法
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:
方法一：手动解压JDK的压缩包，然后设置环境变量
1.在/usr/目录下创建java目录
[root@localhost~]#mkdir/usr/java
[root@localhost~]#cd/usr/java
2.下载jdk,然后解压
[root@localhostjava]#curl-Ohttp://download.Oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz
[root@localhostjava]#tar-zxvfjdk-7u79-linux-x64.tar.gz
3.设置环境变量
[root@localhostjava]#vi/etc/profile
在profile中添加如下内容:
#setjavaenvironment
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
exportJAVA_HOMEJRE_HOMECLASS_PATHPATH
让修改生效:
[root@localhostjava]#source/etc/profile
4.验证JDK有效性
[root@localhostjava]#java-version
javaversion"1.7.0_79"
Java(TM)SERuntimeEnvironment(build1.7.0_79-b15)
JavaHotSpot(TM)64-BitServerVM(build24.79-b02,mixedmode)
方法二：用yum安装JDK
1.查看yum库中都有哪些jdk版本(暂时只发现了openjdk)
[root@localhost~]#yumsearchjava|grepjdk
ldapjdk-javadoc.x86_64:Javadocforldapjdk
java-1.6.0-openjdk.x86_64:OpenJDKRuntimeEnvironment
java-1.6.0-openjdk-demo.x86_64:OpenJDKDemos
java-1.6.0-openjdk-devel.x86_64:OpenJDKDevelopmentEnvironment
java-1.6.0-openjdk-javadoc.x86_64:OpenJDKAPIDocumentation
java-1.6.0-openjdk-src.x86_64:OpenJDKSourceBundle
java-1.7.0-openjdk.x86_64:OpenJDKRuntimeEnvironment
java-1.7.0-openjdk-demo.x86_64:OpenJDKDemos
java-1.7.0-openjdk-devel.x86_64:OpenJDKDevelopmentEnvironment
java-1.7.0-openjdk-javadoc.noarch:OpenJDKAPIDocumentation
java-1.7.0-openjdk-src.x86_64:OpenJDKSourceBundle
java-1.8.0-openjdk.x86_64:OpenJDKRuntimeEnvironment
java-1.8.0-openjdk-demo.x86_64:OpenJDKDemos
java-1.8.0-openjdk-devel.x86_64:OpenJDKDevelopmentEnvironment
java-1.8.0-openjdk-headless.x86_64:OpenJDKRuntimeEnvironment
java-1.8.0-openjdk-javadoc.noarch:OpenJDKAPIDocumentation
java-1.8.0-openjdk-src.x86_64:OpenJDKSourceBundle
ldapjdk.x86_64:TheMozillaLDAPJavaSDK
2.选择版本,进行安装
//选择1.7版本进行安装
[root@localhost~]#yuminstalljava-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
3.设置环境变量
[root@localhost~]#vi/etc/profile
在profile文件中添加如下内容
#setjavaenvironment
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:$JRE_HOME/bin
exportJAVA_HOMEJRE_HOMECLASS_PATHPATH
让修改生效
[root@localhostjava]#source/etc/profile
4.验证(同上一方法)
方法三：用rpm安装JDK
1.下载rpm安装文件
[root@localhost~]$curl-Ohttp://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.rpm
2.使用rpm命令安装
[root@localhost~]#rpm-ivhjdk-7u79-linux-x64.rpm
3.设置环境变量
[root@localhostjava]#vi/etc/profile
在打开的profile文件中添加如下内容
#setjavaenvironment
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
exportJAVA_HOMEJRE_HOMECLASS_PATHPATH
让修改生效
[root@localhostjava]#source/etc/profile
4.验证(同上一方法)
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@localhostbin]#ll|grepjava
lrwxrwxrwx.1rootroot25Mar2811:24jar->/usr/java/default/bin/jar
lrwxrwxrwx.1rootroot26Mar2811:24java->/usr/java/default/bin/java
lrwxrwxrwx.1rootroot27Mar2811:24javac->/usr/java/default/bin/javac
lrwxrwxrwx.1rootroot29Mar2811:24javadoc->/usr/java/default/bin/javadoc
lrwxrwxrwx.1rootroot28Mar2811:24javaws->/usr/java/default/bin/javaws
lrwxrwxrwx.1rootroot30Mar2811:24jcontrol->/usr/java/default/bin/jcontrol
[root@localhostbin]#cd/usr/java/
[root@localhostjava]#ll
total4
lrwxrwxrwx.1rootroot16Mar2811:24default->/usr/java/latest
drwxr-xr-x.8rootroot4096Mar2811:24jdk1.7.0_79
lrwxrwxrwx.1rootroot21Mar2811:24latest->/usr/java/jdk1.7.0_79
方法四：Ubuntu上使用apt-get安装JDK
1.查看apt库都有哪些jdk版本
root@linuxidc:~#apt-cachesearchjava|grepjdk
default-jdk-StandardJavaorJavacompatibleDevelopmentKit
default-jdk-doc-StandardJavaorJavacompatibleDevelopmentKit(documentation)
gcj-4.6-jdk-gcjandclasspathdevelopmenttoolsforJava(TM)
gcj-jdk-gcjandclasspathdevelopmenttoolsforJava(TM)
openjdk-6-dbg-JavaruntimebasedonOpenJDK(debuggingsymbols)
openjdk-6-demo-JavaruntimebasedonOpenJDK(demosandexamples)
openjdk-6-doc-OpenJDKDevelopmentKit(JDK)documentation
openjdk-6-jdk-OpenJDKDevelopmentKit(JDK)
openjdk-6-jre-lib-OpenJDKJavaruntime(architectureindependentlibraries)
openjdk-6-source-OpenJDKDevelopmentKit(JDK)sourcefiles
openjdk-7-dbg-JavaruntimebasedonOpenJDK(debuggingsymbols)
openjdk-7-demo-JavaruntimebasedonOpenJDK(demosandexamples)
openjdk-7-doc-OpenJDKDevelopmentKit(JDK)documentation
openjdk-7-jdk-OpenJDKDevelopmentKit(JDK)
openjdk-7-source-OpenJDKDevelopmentKit(JDK)sourcefiles
uwsgi-plugin-jvm-openjdk-6-JavapluginforuWSGI(OpenJDK6)
uwsgi-plugin-jwsgi-openjdk-6-JWSGIpluginforuWSGI(OpenJDK6)
openjdk-6-jre-OpenJDKJavaruntime,usingHotspotJIT
openjdk-6-jre-headless-OpenJDKJavaruntime,usingHotspotJIT(headless)
openjdk-7-jre-OpenJDKJavaruntime,usingHotspotJIT
openjdk-7-jre-headless-OpenJDKJavaruntime,usingHotspotJIT(headless)
openjdk-7-jre-lib-OpenJDKJavaruntime(architectureindependentlibraries)
2.选择版本进行安装
root@linuxidc:~#apt-getinstallopenjdk-7-jdk
3.设置环境变量
root@linuxidc:~#vi/etc/profile
在打开的profile文件中添加如下内容
#setjavaenvironment
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
exportJAVA_HOMEJRE_HOMECLASS_PATHPATH
让修改生效
root@linuxidc:~#source/etc/profile
4.验证(同上一方法)
Ubuntu14.04安装JDK1.8.0_25与配置环境变量http://www.linuxidc.com/Linux/2015-01/112030.htm
CentOS搭建JDK环境http://www.linuxidc.com/Linux/2015-06/118879.htm
Ubuntu14.04安装JDK1.8.0_25与配置环境变量http://www.linuxidc.com/Linux/2015-01/112030.htm
Ubuntu14.04LTS安装OracleJDK1.8http://www.linuxidc.com/Linux/2014-11/109216.htm
CentOS6.3安装JDK和环境配置http://www.linuxidc.com/Linux/2012-09/70780.htm
Ubuntu14.04安装JDK8http://www.linuxidc.com/Linux/2014-09/106218.htm
Ubuntu下安装JDK图文解析http://www.linuxidc.com/Linux/2014-09/107291.htm
本文永久更新链接地址：http://www.linuxidc.com/Linux/2016-09/134941.htm
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