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#### 1、在$OpenJDK$下安装$jar$命令
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```
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yum install java-1.8.0-openjdk-devel
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```
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#### 2、将文件复制到容器外
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```
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docker cp 83bbd9bd5d80:/root/gw-charge.jar ./
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```
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#### 3、解压$JAR$包
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```shell
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# 解压 jar 到gw-charge目录下
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unzip gw-charge.jar -d gw-charge
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# 下载旧的jar包，备份防止出意外
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sz ms-task.jar
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```
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#### 4、修改配置文件或添加$class$
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```shell
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略
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```
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#### 5、打包$JAR$
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```shell
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# 如果不进去目录直接打包，会发现多了一层目录gw-charge,这样启动jar会报错！
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cd gw-charge
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jar -cvfM0 ../gw-charge.jar ./
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# 删除用完的目录
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rm -rf gw-charge
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```
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#### 6、将文件复制回容器
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```
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docker cp ./gw-charge.jar 83bbd9bd5d80:/root/gw-charge.jar
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```
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#### 7、重新启动 $Docker$容器
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```shell
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docker restart 83bbd9bd5d80
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```
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