在Java程序的shell脚本/访问中设置环境变量 [英] Set environment variable in shell script/access in Java program
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问题描述
我想在Ubuntu 10.04中使用Shell Scrip设置环境,并希望在Java程序中访问.我已经这样写了shell脚本:
I want to set environment using shell scrip in Ubuntu 10.04 and want to access in java program. I have wrote shell script like this:
#! /bin/sh
export JAVA=/home/ubuntu
echo "Variable $JAVA"
我的Java程序是:
import java.util.Map;
public class SystemEnv
{
public static void main(String[] args)
{
Map<String, String> variables = System.getenv();
for (Map.Entry<String, String> entry : variables.entrySet())
{
String name = entry.getKey();
String value = entry.getValue();
System.out.println(name + "=" + value);
}
System.out.println(System.getenv(("JAVA")));
}
}
当我在不使用Shell脚本的情况下执行此命令时,效果很好,但是在Shell脚本中却无法运行.
When I execute this command without shell script it works well, but in shell script it does not.
推荐答案
您如何采购脚本?
$./myscript.sh
或
$source ./myscript.sh
第二个将环境变量设置为当前shell. Java程序看起来还可以.
The second will set the environment variable to current shell. The java program looks ok.
基于评论
这是与subshell相关的问题.快速阅读
有什么区别在执行bash脚本和采购bash脚本之间?
It was a problem related to subshell. A quick read is
What is the difference between executing a bash script and sourcing a bash script?
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