Linux —— 配置或修改JDK版本

我会带着你远行 2024-01-16 06:22 21阅读 0赞

## 环境： ##

centOS6 系统， 自带JDK1.6

## 步骤： ##

### 1: java -version 是否存在JDK，或者原JDK信息，若有JDK信息，先删除： ###

**rm -f /usr/bin/java  
rm -f /usr/bin/javac  
rm -f /etc/alternatives/java  
rm -f /etc/alternatives/javac**

![20190423220115204.png][]

### 2.将jdk压缩包放到 /usr/java/ 目录下，java目录不存在则创建，解压jdk ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70][]

**解压命令： tar -zxvf jdk-8u202-linux-x64.tar.gz**

![20190423220338762.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70 1][]

### 3：用命令cd ../ 退到根目录，再vi /etc/profile 修改文件信息，添加JDK信息到最后： ###

export JAVA\_HOME=/usr/java/jdk1.8.0\_202

export JAVA\_BIN=/usr/java/jdk1.8.0\_202/bin

export PATH=$PATH:$JAVA\_HOME/bin

export CLASSPATH=.:$JAVA\_HOME/lib/dt.jar:$JAVA\_HOME/lib/tools.jar

export JAVA\_HOME JAVA\_BIN PATH CLASSPATH

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70 2][]

**保存。**

### 4：使配置生效 ， 命令： source /etc/profile ，最后 Java -version 查看配置是否成功： ###

### ![2019042322093129.png][] ###

## 成功！ ##

[20190423220115204.png]: https://img-blog.csdnimg.cn/20190423220115204.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190423220236566.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc=,size_16,color_FFFFFF,t_70
[20190423220338762.png]: https://img-blog.csdnimg.cn/20190423220338762.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20190423220349720.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20190423221219781.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc=,size_16,color_FFFFFF,t_70
[2019042322093129.png]: https://img-blog.csdnimg.cn/2019042322093129.png