[TOC] # jdk & Maven & git ## 下载资源 1. 系统下载 CentOS7 http://mirrors.aliyun.com/centos/7/isos/x86_64/ 2. jdk-8u241 链接：https://pan.baidu.com/s/1R9LPq_XFrRZ9nXEyvnX44g 提取码：jqxt 3. Maven 链接：https://pan.baidu.com/s/1s5wRwZzG34XUJSy-CjsINQ 提取码：y8ed 备注：只是为了方便学习而提供，建议从官网下载 ## 检测历史安装 查看Linux自带的JDK是否已安装 ```shell java -version ``` 查看JDK信息 ```shell rpm -qa | grep java ``` 卸载（有几个卸载几个） ```shell rpm -e --nodeps java-x.x.x-gcj-compat-x.x.x.x-xxjpp.xxx rpm -e --nodeps java-x.x.x-openjdk-x.x.x.x-x.x.bxx.exx ``` ## 解压安装 ```shell tar -zxvf jdk-8u241-linux-i586.tar.gz mv jdk1.8.0_241/ java && mv java /usr/local/ tar -zxf apache-maven-3.6.3-bin.tar.gz mv apache-maven-3.6.3/ maven && mv maven /usr/local/ ``` ## 配置环境变量 安装完成后需要配置一下环境变量，编辑/etc/profile文件： ```shell vim /etc/profile ``` 在文件尾部添加如下配置： ```shell #java export JAVA_HOME=/usr/local/java export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib #export PATH=$PATH:${JAVA_HOME}/bin #maven export M2_HOME=/usr/local/maven #path export PATH=$PATH:$JAVA_HOME/bin:$M2_HOME/bin ``` source命令重新加载/etc/profile文件，使得修改后的内容在当前shell窗口有效： ```shell source /etc/profile ``` ## 检查是否成功 成功 ```shell [root@server jdk1.8.0_241]# java -version java version "1.8.0_241" Java(TM) SE Runtime Environment (build 1.8.0_241-b07) Java HotSpot(TM) Client VM (build 25.241-b07, mixed mode) ``` 失败 ```shell [root@serverjdk1.8.0_241]# java -version -bash: /usr/local/jdk1.8.0_241/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory PS: 需要运行 yum install glibc.i686 -y ``` 运行java时候 libgcc_s.so.1 ```java java.lang.UnsatisfiedLinkError: /usr/local/java/jre/lib/i386/libfontmanager.so: libgcc_s.so.1: cannot open shared object file: No such file or directory at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1934) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1838) at java.lang.Runtime.loadLibrary0(Runtime.java:870) at java.lang.System.loadLibrary(System.java:1122) at sun.font.FontManagerNativeLibrary$1.run(FontManagerNativeLibrary.java:61) at java.security.AccessController.doPrivileged(Native Method) at sun.font.FontManagerNativeLibrary.<clinit>(FontManagerNativeLibrary.java:32) at sun.font.SunFontManager$1.run(SunFontManager.java:339) at java.security.AccessController.doPrivileged(Native Method) at sun.font.SunFontManager.<clinit>(SunFontManager.java:335) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:82) at java.security.AccessController.doPrivileged(Native Method) at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74) at java.awt.Font.getFont2D(Font.java:491) at java.awt.Font.getFamily(Font.java:1220) at java.awt.Font.getFamily_NoClientCode(Font.java:1194) at java.awt.Font.getFamily(Font.java:1186) at java.awt.Font.toString(Font.java:1683) at hudson.util.ChartUtil.<clinit>(ChartUtil.java:260) at hudson.WebAppMain.contextInitialized(WebAppMain.java:192) ``` PS: 需要运行 ```shell yum install -y libgcc_s.so.1 ```