java安装 环境配置

bin\jlink.exe --module-path jmods --add-modules java.desktop --output jre

hostnamectl

[root@huawei lib]# rpm -qa | grep jdk
java-1.8.0-openjdk-headless-1.8.0.232.b09-0.el7_7.aarch64
java-1.8.0-openjdk-devel-1.8.0.232.b09-0.el7_7.aarch64
java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.aarch64
copy-jdk-configs-3.3-10.el7_5.noarch

rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.232.b09-0.el7_7.aarch64
rpm -e --nodeps java-1.8.0-openjdk-devel-1.8.0.232.b09-0.el7_7.aarch64
rpm -e --nodeps java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.aarch64

cd /usr/local
tar -zxvf jdk-11.0.12_linux-x64_bin.tar.gz

vim /etc/profile

#java environment
export JAVA_HOME=/usr/local/jdk-11.0.12
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=./:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin

source /etc/profile

java -version

<p><h3>文章目录</h3><ul><ul><li><a href="#1__2">1 介绍</a></li><ul><li><a href="#11__4">1.1 下载地址：</a></li></ul><li><a href="#1_windows_12">1 windows安装</a></li><ul><li><a href="#21__16">2.1 环境配置</a></li></ul><li><a href="#3_liniux_32">3 liniux安装</a></li><ul><li><a href="#31__35">3.1 查看服务器架构</a></li><li><a href="#32_openjdk_41">3.2 卸载系统自带openjdk</a></li><li><a href="#33__59">3.3 环境配置</a></li></ul></ul></ul></p> <h2><a id="1__2"></a>1 介绍</h2> <h3><a id="11__4"></a>1.1 下载地址：</h3> <ul> <li> <p><a href="http://jdk.java.net/17/" target="_blank">http://jdk.java.net/17/</a></p> </li> <li> <p>jdk11：<a href="https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html" target="_blank">https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html</a></p> </li> <li> <p>jdk17：<a href="https://www.oracle.com/java/technologies/downloads/" target="_blank">https://www.oracle.com/java/technologies/downloads/</a></p> </li> </ul> <h2><a id="1_windows_12"></a>1 windows安装</h2> <p>安装目录：<br /> <code>C:\Program Files\Java\jdk-11.0.12</code></p> <h3><a id="21__16"></a>2.1 环境配置</h3> <ol> <li> <p>变量：<br /> <code>JAVA_HOME</code>: <code>C:\Program Files\Java\jdk-11.0.12</code><br /> <code>CLASSPATH</code>：<code>.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar; </code><br /> 记得前面有个&quot;.&quot;</p> </li> <li> <p>Path：<br /> <code>%JAVA_HOME%\bin</code><br /> <code>%JAVA_HOME%\jre\bin</code></p> </li> </ol> <p><strong>如果没有jre文件夹：以管理员权限运行</strong></p> <pre><div class="hljs"><code class="lang-shell">bin\jlink.exe --module-path jmods --add-modules java.desktop --output jre </code></div></pre> <h2><a id="3_liniux_32"></a>3 liniux安装</h2> <ul> <li>以centos7为例</li> </ul> <h3><a id="31__35"></a>3.1 查看服务器架构</h3> <pre><div class="hljs"><code class="lang-shell">hostnamectl </code></div></pre> <h3><a id="32_openjdk_41"></a>3.2 卸载系统自带openjdk</h3> <p>查询出系统自带的OpenJDK及版本，没有跳过此步骤</p> <pre><div class="hljs"><code class="lang-shell">[root@huawei lib]# rpm -qa | grep jdk java-1.8.0-openjdk-headless-1.8.0.232.b09-0.el7_7.aarch64 java-1.8.0-openjdk-devel-1.8.0.232.b09-0.el7_7.aarch64 java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.aarch64 copy-jdk-configs-3.3-10.el7_5.noarch </code></div></pre> <p>卸载</p> <pre><div class="hljs"><code class="lang-shell">rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.232.b09-0.el7_7.aarch64 rpm -e --nodeps java-1.8.0-openjdk-devel-1.8.0.232.b09-0.el7_7.aarch64 rpm -e --nodeps java-1.8.0-openjdk-1.8.0.232.b09-0.el7_7.aarch64 </code></div></pre> <h3><a id="33__59"></a>3.3 环境配置</h3> <p><strong>文件</strong></p> <pre><div class="hljs"><code class="lang-shell">cd /usr/local tar -zxvf jdk-11.0.12_linux-x64_bin.tar.gz </code></div></pre> <p><strong>环境变量配置</strong></p> <pre><div class="hljs"><code class="lang-shell">vim /etc/profile </code></div></pre> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta">#</span><span class="language-bash">java environment</span> export JAVA_HOME=/usr/local/jdk-11.0.12 export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=./:$JAVA_HOME/lib:$JRE_HOME/lib export PATH=$PATH:$JAVA_HOME/bin </code></div></pre> <pre><div class="hljs"><code class="lang-shell">source /etc/profile </code></div></pre> <p>查看</p> <pre><div class="hljs"><code class="lang-shell">java -version </code></div></pre>