如何查看linux服务器上jdk的安装路径

今天药忘吃喽~ 2022-06-13 11:22 275阅读 0赞

如何在一台Linux服务器上查找JDK的安装路径呢？ 有那些方法可以查找定位JDK的安装路径？是否有一些局限性呢？ 下面总结了一下如何查找JDK安装路径的方法.

**1：echo $JAVA\_HOME**

使用$JAVA\_HOME的话能定位JDK的安装路径的前提是配置了环境变量$JAVA\_HOME，否则如下所示，根本定位不到JDK的安装路径

\[root@localhost ~\]\# java -version

java version "1.7.0\_65"

OpenJDK Runtime Environment (rhel-2.5.1.2.el6\_5-x86\_64 u65-b17)

OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

\[root@localhost ~\]\# echo $JAVA\_HOME

[![clip\_image001][clip_image001]][clip_image001_clip_image001]

**2：which java**

首先要申明一下which java是定位不到安装路径的。which java定位到的是java程序的执行路径。网上的资料都是人云亦云，完全不去思考。那么怎么定位到java的安装路径呢？下面我们来看看例子吧,如下所示：

[root@localhost ~]# java -version

java version "1.7.0_65"

OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)

OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

[root@localhost ~]# which java

/usr/bin/java

[root@localhost ~]# ls -lrt /usr/bin/java

lrwxrwxrwx. 1 root root 22 Aug 17 15:12 /usr/bin/java -> /etc/alternatives/java

[root@localhost ~]# ls -lrt /etc/alternatives/java

lrwxrwxrwx. 1 root root 46 Aug 17 15:12 /etc/alternatives/java -> /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java

[root@localhost ~]#

[root@localhost ~]# cd /usr/lib/jvm

[root@localhost jvm]# ls

java-1.6.0-openjdk-1.6.0.0.x86_64 java-1.7.0-openjdk-1.7.0.65.x86_64 jre jre-1.6.0 jre-1.6.0-openjdk.x86_64 jre-1.7.0 jre-1.7.0-openjdk.x86_64 jre-openjdk

[root@localhost jvm]#

[![clip\_image002][clip_image002]][clip_image002_clip_image002]

whereis java 也是如此，它本身不能定位到安装路径。可以通过上面例子去定位安装路径

[![clip\_image003][clip_image003]][clip_image003_clip_image003]

**3： rpm -ql packagename**

如果JDK是源码安装的话，那么这个方法也是行不通的。也就是说rpm –ql packagename也是有一定局限性的。

[root@localhost ~]# java -version

java version "1.7.0_65"

OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)

OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

[root@localhost ~]# rpm -qa | grep java

tzdata-java-2014g-1.el6.noarch

java-1.6.0-openjdk-1.6.0.0-11.1.13.4.el6.x86_64

java-1.7.0-openjdk-1.7.0.65-2.5.1.2.el6_5.x86_64

[root@localhost ~]# rpm -ql java-1.7.0-openjdk-1.7.0.65-2.5.1.2.el6_5.x86_64 | more

/etc/.java

/etc/.java/.systemPrefs

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jaas-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jaas-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jaas.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jce-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jce-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jce.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jdbc-stdext-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jdbc-stdext-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jdbc-stdext-3.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jdbc-stdext.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-cos-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-cos-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-cos.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-ldap-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-ldap-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-ldap.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-rmi-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-rmi-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi-rmi.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jndi.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jsse-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jsse-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/jsse.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/sasl-1.7.0.65.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/sasl-1.7.0.jar

/usr/lib/jvm-exports/java-1.7.0-openjdk-1.7.0.65.x86_64/sasl.jar

/usr/lib/jvm-exports/jre-1.7.0-openjdk.x86_64

/usr/lib/jvm-private/java-1.7.0-openjdk.x86_64

/usr/lib/jvm-private/java-1.7.0-openjdk.x86_64/jce

/usr/lib/jvm-private/java-1.7.0-openjdk.x86_64/jce/vanilla

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/ASSEMBLY_EXCEPTION

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/LICENSE

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/THIRD_PARTY_README

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/java

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/keytool

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/orbd

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/pack200

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/policytool

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/rmid

/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.65.x86_64/jre/bin/rmiregistry

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[clip_image001]: http://images0.cnblogs.com/blog/73542/201508/271214100627310.png
[clip_image001_clip_image001]: /images/20220613/bf912e6b35e945e2aefa5976afe15658.png
[clip_image002]: http://images0.cnblogs.com/blog/73542/201508/271214110315239.png
[clip_image002_clip_image002]: /images/20220613/bfac52ec7c6d45249c7924c45e3d963d.png
[clip_image003]: http://images0.cnblogs.com/blog/73542/201508/271214131563855.png
[clip_image003_clip_image003]: /images/20220613/3ec13564df874110b407f8f4d3c9233d.png
[clip_image004]: http://images0.cnblogs.com/blog/73542/201508/271214142195513.png
[clip_image004_clip_image004]: /images/20220613/d092fbcdf2234ee8804f745eb2274469.png