linux 上使用yum 安装openjdk1.8

 

  1. 使用yum查找jdk: yum search java|grep jdk

    # yum search java|grep jdk
    ldapjdk-javadoc.noarch : 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-accessibility.x86_64 : OpenJDK accessibility connector
    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-headless.x86_64 : The OpenJDK runtime environment without
    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.i686 : OpenJDK Runtime Environment
    java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
    java-1.8.0-openjdk-accessibility.i686 : OpenJDK accessibility connector
    java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector
    java-1.8.0-openjdk-accessibility-debug.i686 : OpenJDK accessibility connector
    java-1.8.0-openjdk-accessibility-debug.x86_64 : OpenJDK accessibility connector
    java-1.8.0-openjdk-debug.i686 : OpenJDK Runtime Environment with full debug on
    java-1.8.0-openjdk-debug.x86_64 : OpenJDK Runtime Environment with full debug on
    java-1.8.0-openjdk-demo.i686 : OpenJDK Demos
    java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
    java-1.8.0-openjdk-demo-debug.i686 : OpenJDK Demos with full debug on
    java-1.8.0-openjdk-demo-debug.x86_64 : OpenJDK Demos with full debug on
    java-1.8.0-openjdk-devel.i686 : OpenJDK Development Environment
    java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
    java-1.8.0-openjdk-devel-debug.i686 : OpenJDK Development Environment with full
    java-1.8.0-openjdk-devel-debug.x86_64 : OpenJDK Development Environment with
    java-1.8.0-openjdk-headless.i686 : OpenJDK Runtime Environment
    java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
    java-1.8.0-openjdk-headless-debug.i686 : OpenJDK Runtime Environment with full
    java-1.8.0-openjdk-headless-debug.x86_64 : OpenJDK Runtime Environment with full
    java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
    java-1.8.0-openjdk-javadoc-debug.noarch : OpenJDK API Documentation for packages
    java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK API Documentation compressed in
    java-1.8.0-openjdk-javadoc-zip-debug.noarch : OpenJDK API Documentation
    java-1.8.0-openjdk-src.i686 : OpenJDK Source Bundle
    java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
    java-1.8.0-openjdk-src-debug.i686 : OpenJDK Source Bundle for packages with
    java-1.8.0-openjdk-src-debug.x86_64 : OpenJDK Source Bundle for packages with
    java-11-openjdk.i686 : OpenJDK Runtime Environment 11
    java-11-openjdk.x86_64 : OpenJDK Runtime Environment 11
    java-11-openjdk-debug.i686 : OpenJDK Runtime Environment 11 with full debug on
    java-11-openjdk-debug.x86_64 : OpenJDK Runtime Environment 11 with full debug on
    java-11-openjdk-demo.i686 : OpenJDK Demos 11
    java-11-openjdk-demo.x86_64 : OpenJDK Demos 11
    java-11-openjdk-demo-debug.i686 : OpenJDK Demos 11 with full debug on
    java-11-openjdk-demo-debug.x86_64 : OpenJDK Demos 11 with full debug on
    java-11-openjdk-devel.i686 : OpenJDK Development Environment 11
    java-11-openjdk-devel.x86_64 : OpenJDK Development Environment 11
    java-11-openjdk-devel-debug.i686 : OpenJDK Development Environment 11 with full
    java-11-openjdk-devel-debug.x86_64 : OpenJDK Development Environment 11 with
    java-11-openjdk-headless.i686 : OpenJDK Headless Runtime Environment 11
    java-11-openjdk-headless.x86_64 : OpenJDK Headless Runtime Environment 11
    java-11-openjdk-headless-debug.i686 : OpenJDK Runtime Environment with full
    java-11-openjdk-headless-debug.x86_64 : OpenJDK Runtime Environment with full
    java-11-openjdk-javadoc.i686 : OpenJDK 11 API documentation
    java-11-openjdk-javadoc.x86_64 : OpenJDK 11 API documentation
    java-11-openjdk-javadoc-debug.i686 : OpenJDK 11 API documentation for packages
    java-11-openjdk-javadoc-debug.x86_64 : OpenJDK 11 API documentation for packages
    java-11-openjdk-javadoc-zip.i686 : OpenJDK 11 API documentation compressed in
    java-11-openjdk-javadoc-zip.x86_64 : OpenJDK 11 API documentation compressed in
    java-11-openjdk-javadoc-zip-debug.i686 : OpenJDK 11 API documentation compressed
    java-11-openjdk-javadoc-zip-debug.x86_64 : OpenJDK 11 API documentation
    java-11-openjdk-jmods.i686 : JMods for OpenJDK 11
    java-11-openjdk-jmods.x86_64 : JMods for OpenJDK 11
    java-11-openjdk-jmods-debug.i686 : JMods for OpenJDK 11 with full debug on
    java-11-openjdk-jmods-debug.x86_64 : JMods for OpenJDK 11 with full debug on
    java-11-openjdk-src.i686 : OpenJDK Source Bundle 11
    java-11-openjdk-src.x86_64 : OpenJDK Source Bundle 11
    java-11-openjdk-src-debug.i686 : OpenJDK Source Bundle for packages with debug
    java-11-openjdk-src-debug.x86_64 : OpenJDK Source Bundle 11 for packages with
    ldapjdk.noarch : The Mozilla LDAP Java SDK
  2. 执行安装命令:yum install java-1.8.0-openjdk

    安装成功后,默认安装路径在/usr/lib/jvm/下边,
    如/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.144-0.b01.el6_9.x86_64

    查看安装路径(如下所示):
    which java
    ls -lrt /usr/bin/java

    [root@preproduct1 ~]# which java
    /usr/bin/java
    [root@preproduct1 ~]# echo $JAVA_HOME
    /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64
    [root@preproduct1 ~]# ls -lrt /usr/bin/java
    lrwxrwxrwx 1 root root 22 Feb 13 10:40 /usr/bin/java -> /etc/alternatives/java
    [root@preproduct1 ~]# ls -lrt /etc/alternatives/java
    lrwxrwxrwx 1 root root 73 Feb 13 10:40 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/bin/java
    [root@preproduct1 ~]# cd /usr/lib/jvm
    [root@preproduct1 /usr/lib/jvm]# ll
    total 4
    lrwxrwxrwx 1 root root   26 Feb 13 10:44 java -> /etc/alternatives/java_sdk
    lrwxrwxrwx 1 root root   32 Feb 13 10:44 java-1.8.0 -> /etc/alternatives/java_sdk_1.8.0
    lrwxrwxrwx 1 root root   40 Feb 13 10:44 java-1.8.0-openjdk -> /etc/alternatives/java_sdk_1.8.0_openjdk
    drwxr-xr-x 7 root root 4096 Feb 13 10:44 java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64
    lrwxrwxrwx 1 root root   34 Feb 13 10:44 java-openjdk -> /etc/alternatives/java_sdk_openjdk
    lrwxrwxrwx 1 root root   21 Feb 13 10:40 jre -> /etc/alternatives/jre
    lrwxrwxrwx 1 root root   27 Feb 13 10:40 jre-1.8.0 -> /etc/alternatives/jre_1.8.0
    lrwxrwxrwx 1 root root   35 Feb 13 10:40 jre-1.8.0-openjdk -> /etc/alternatives/jre_1.8.0_openjdk
    lrwxrwxrwx 1 root root   51 Feb 13 10:40 jre-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64 -> java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre
    lrwxrwxrwx 1 root root   29 Feb 13 10:40 jre-openjdk -> /etc/alternatives/jre_openjdk
  3. 验证java是否安装成功

    • 查看java版本:java -version

      # java -version
      openjdk version "1.8.0_191"
      OpenJDK Runtime Environment (build 1.8.0_191-b12)
      OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
    • 查看java是否可用:javac

      # javac
      -bash: javac: command not found

      错误原因:默认安装完只有运行环境,java安装目录下只有jre文件夹

  4. 安装开发环境yum install java-1.8.0-openjdk-devel.x86_64
    安装完可看到java安装目录下出现bin、lib等文件夹:

    [root@preproduct1 /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64]# l
    total 20
    drwxr-xr-x 2 root root 4096 Feb 13 10:44 bin
    drwxr-xr-x 3 root root 4096 Feb 13 10:44 include
    drwxr-xr-x 4 root root 4096 Feb 13 10:40 jre
    drwxr-xr-x 3 root root 4096 Feb 13 10:44 lib
    drwxr-xr-x 2 root root 4096 Feb 13 10:44 tapset

    再次输入javac说明安装成功

    # javac
    Usage: javac <options> <source files>
    where possible options include:
      -g                         Generate all debugging info
      -g:none                    Generate no debugging info
      -g:{lines,vars,source}     Generate only some debugging info
      -nowarn                    Generate no warnings
      -verbose                   Output messages about what the compiler is doing
      -deprecation               Output source locations where deprecated APIs are use
      -classpath <path>          Specify where to find user class files and annotationocessors
      -cp <path>                 Specify where to find user class files and annotationocessors
      -sourcepath <path>         Specify where to find input source files
      -bootclasspath <path>      Override location of bootstrap class files
      -extdirs <dirs>            Override location of installed extensions
      -endorseddirs <dirs>       Override location of endorsed standards path
      -proc:{none,only}          Control whether annotation processing and/or compilat is done.
      -processor <class1>[,<class2>,<class3>...] Names of the annotation processors ton; bypasses default discovery process
      -processorpath <path>      Specify where to find annotation processors
      -parameters                Generate metadata for reflection on method parameters
      -d <directory>             Specify where to place generated class files
      -s <directory>             Specify where to place generated source files
      -h <directory>             Specify where to place generated native header files
      -implicit:{none,class}     Specify whether or not to generate class files for imcitly referenced files
      -encoding <encoding>       Specify character encoding used by source files
      -source <release>          Provide source compatibility with specified release
      -target <release>          Generate class files for specific VM version
      -profile <profile>         Check that API used is available in the specified proe
      -version                   Version information
      -help                      Print a synopsis of standard options
      -Akey[=value]              Options to pass to annotation processors
      -X                         Print a synopsis of nonstandard options
      -J<flag>                   Pass <flag> directly to the runtime system
      -Werror                    Terminate compilation if warnings occur
      @<filename>                Read options and filenames from file
  5. 设置环境变量
    修改/etc/profile文件:vi /etc/profile
    在profile文件末尾新增如下内容:

    #set java environment
       JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.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

    使环境变量生效:source /etc/profile

    [root@preproduct1 /usr/lib/jvm]# cd /usr/lib/jvm
    [root@preproduct1 /usr/lib/jvm]# cd java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/
    [root@preproduct1 /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64]# source /etc/profile
    [root@preproduct1 /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64]# echo $JAVA_HOME
    /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64

至此jdk安装成功

posted @ 2019-02-13 11:28  琼兔  阅读(36170)  评论(0编辑  收藏  举报