在linux上经过yum安装JDK

时间 2019-11-21

标签 linux 经过 yum 安装 jdk 栏目 Linux 繁體版

原文原文链接

彻底转载自:https://my.oschina.net/andyfeng/blog/601291css

这里完整粘贴一份留存java

卸载centos自带的jdknode

1.查看当前的jdk版本，并卸载shell

[root@localhost opt]#  rpm -qa|grep java  java-1.6.0-openjdk-1.6.0.37-1.13.9.4.el5_11 tzdata-java-2015g-1.el5 //卸载 [root@localhost opt]# rpm -e --allmatches --nodeps java-1.6.0-openjdk-1.6.0.37-1.13.9.4.el5_11 [root@localhost opt]# rpm -e --allmatches --nodeps tzdata-java-2015g-1.el5

yum卸载方法centos

yum -y remove java-1.8.0*ruby

安装Jdkbash

1.查找java相关得列表app

[root@localhost jre-1.6.0-openjdk.x86_64]# yum -y list java* Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * addons: mirrors.btte.net  * base: centos.ustc.edu.cn  * extras: centos.ustc.edu.cn  * updates: centos.ustc.edu.cn Installed Packages java-1.6.0-openjdk.x86_64                                        1:1.6.0.37-1.13.9.4.el5_11                              installed Available Packages java-1.4.2-gcj-compat.x86_64                                     1.4.2.0-40jpp.115                                       base      java-1.4.2-gcj-compat-devel.i386                                 1.4.2.0-40jpp.115                                       base      java-1.4.2-gcj-compat-devel.x86_64                               1.4.2.0-40jpp.115                                       base      java-1.4.2-gcj-compat-javadoc.x86_64                             1.4.2.0-40jpp.115                                       base      java-1.4.2-gcj-compat-src.x86_64                                 1.4.2.0-40jpp.115                                       base      java-1.6.0-openjdk-demo.x86_64                                   1:1.6.0.37-1.13.9.4.el5_11                              updates   java-1.6.0-openjdk-devel.x86_64                                  1:1.6.0.37-1.13.9.4.el5_11                              updates   java-1.6.0-openjdk-javadoc.x86_64                                1:1.6.0.37-1.13.9.4.el5_11                              updates   java-1.6.0-openjdk-src.x86_64                                    1:1.6.0.37-1.13.9.4.el5_11                              updates   java-1.7.0-openjdk.x86_64                                        1:1.7.0.91-2.6.2.1.el5_11                               updates   java-1.7.0-openjdk-demo.x86_64                                   1:1.7.0.91-2.6.2.1.el5_11                               updates   java-1.7.0-openjdk-devel.x86_64                                  1:1.7.0.91-2.6.2.1.el5_11                               updates   java-1.7.0-openjdk-javadoc.x86_64                                1:1.7.0.91-2.6.2.1.el5_11                               updates   java-1.7.0-openjdk-src.x86_64                                    1:1.7.0.91-2.6.2.1.el5_11                               updates   java_cup.x86_64                                                  1:0.10-0.k.6jpp.1                                       base      java_cup-javadoc.x86_64                                          1:0.10-0.k.6jpp.1                                       base      java_cup-manual.x86_64                                           1:0.10-0.k.6jpp.1                                       base      javacc.x86_64                                                    4.0-3jpp.3                                              base      javacc-demo.x86_64                                               4.0-3jpp.3                                              base      javacc-manual.x86_64                                             4.0-3jpp.3                                              base

或 jvm

[root@localhost jre-1.6.0-openjdk.x86_64]# yum search jdk Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * addons: mirrors.btte.net  * base: centos.ustc.edu.cn  * extras: centos.ustc.edu.cn  * updates: centos.ustc.edu.cn ========================================================== Matched: jdk ========================================================== 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.x86_64 : OpenJDK API Documentation java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle gnu-crypto-sasl-jdk1.4.x86_64 : Gnu Crypto SASL API jakarta-commons-beanutils.x86_64 : Jakarta Commons BeanUtils Package jakarta-commons-collections.x86_64 : Jakarta Commons Collections Package jakarta-commons-launcher.x86_64 : The Launcher Component is designed to be a cross platform Java application launcher. ldapjdk.x86_64 : The Mozilla LDAP Java SDK ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk mockobjects-alt-jdk1.4.x86_64 : Mockable API for JDK 1.4 mockobjects-jdk1.4.x86_64 : MockObjects for 1.4 JDK

2.安装jdkgradle

[root@localhost ~]# yum install java-1.6.0-openjdk.x86_64  ……  Total download size: 44 M Is this ok [y/N]: y

3.安装完成以后，验证

[root@localhost ~]# java -version java version "1.6.0_37" OpenJDK Runtime Environment (IcedTea6 1.13.9) (rhel-1.13.9.4.el5_11-x86_64) OpenJDK 64-Bit Server VM (build 23.25-b01, mixed mode)

4.经过yum默认安装的路径为

/usr/lib/jvm

[root@localhost ~]# cd /usr/lib/jvm [root@localhost jvm]# ll total 24 drwxr-xr-x 3 root root 4096 Jan 12 20:01 java-1.6.0-openjdk-1.6.0.37.x86_64 lrwxrwxrwx 1 root root   21 Jan 12 20:01 jre -> /etc/alternatives/jre lrwxrwxrwx 1 root root   27 Jan 12 20:01 jre-1.6.0 -> /etc/alternatives/jre_1.6.0 lrwxrwxrwx 1 root root   38 Jan 12 20:01 jre-1.6.0-openjdk.x86_64 -> java-1.6.0-openjdk-1.6.0.37.x86_64/jre lrwxrwxrwx 1 root root   29 Jan 12 20:01 jre-openjdk -> /etc/alternatives/jre_openjdk

若是机器上同时安装了多个jdk的话，java命令只能指向一个版本的jdk，为了在全局中方便修改jdk版本

/etc/alternatives 的目录下面会有个java连接，指向默认须要执行的版本的jdk的bin/java 命令

[root@localhost jvm]# cd /etc/alternatives [root@localhost alternatives]# ll total 204 lrwxrwxrwx 1 root root 46 Jan 12 20:01 java -> /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java

而/etc/alternatives/java又会被软链接到/usr/bin/java

[root@localhost alternatives]# cd /usr/bin [root@localhost bin]# ll |grep java lrwxrwxrwx 1 root root         22 Jan 12 20:01 java -> /etc/alternatives/java

5.将jdk的安装路径加入到JAVA_HOME

方法一：

[root@localhost bin]# vi /etc/profile

在文件最后加入：

#set java environment JAVA_HOME=/usr/lib/jvm/jre-1.6.0-openjdk.x86_64 PATH=$PATH:$JAVA_HOME/bin CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export JAVA_HOME CLASSPATH PATH

修改/etc/profile以后让其生效

[root@localhost alternatives]# . /etc/profile

注意 . 以后应有一个空格

方法二：

或者是安装上面建立java命令的形式，以方便修改

[root@localhost jvm]# cd /etc/alternatives [root@localhost alternatives]# ln -s /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/ java_home

建立一个/etc/alternatives/java_home的软链接，将该链接指向到当前Jdk的根目录

而后将改链接的路径加进去

#set java environment JAVA_HOME=/etc/alternatives/java_home PATH=$PATH:$JAVA_HOME/bin CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export JAVA_HOME CLASSPATH PATH

[root@localhost alternatives]# export |grep JAVA_HOME declare -x JAVA_HOME="/etc/alternatives/java_home"