1.首先编写文件setenv.bat设置系统环境变量：

echo %cd%

set framework_home=%cd%

echo %framework_home%

wmic ENVIRONMENT create name="framework_home",username="",VariableValue="%framework_home%"

Note:

此处假设framework_home为要添加的系统环境变量，且其值为当前路径。Windows系统有两种环境变量：用户变量和系统变量。上面设置的是系统变量。

2.编写Java程序读取上面设置的系统环境变量：

package test.util;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

class StreamDrainerThread implements Runnable

{

private InputStream ins;

public static String environmentValue;

public StreamDrainerThread(InputStream ins)

{

this.ins = ins;

}

public void run()

{

try

{

BufferedReader reader = new BufferedReader(new InputStreamReader(ins));

String line = null;

while ((line = reader.readLine()) != null)

{

if (!line.trim().equals(""))

{

environmentValue = line;

}

}

} catch (Exception e)

{

e.printStackTrace();

}

}

}

public class WMICJava

{

public static void main(String[] args) throws IOException

{

String[] cmd = new String[]

{ "cmd.exe", "/C", "wmic ENVIRONMENT where \"name=\'framework_home\'\" get VariableValue" };

try

{

Process process = Runtime.getRuntime().exec(cmd);

StreamDrainerThread streamDrainer = new StreamDrainerThread(process.getInputStream());

new Thread(streamDrainer).start();

process.getOutputStream().close();

process.waitFor();

System.out.println("Environment Parameter OATS_HOME is " + StreamDrainerThread.environmentValue);

} catch (Exception e)

{

e.printStackTrace();

}

}

}

参考：

【1】java Runtime 执行 windows wmic 命令

http://hi.baidu.com/kelongxhu/blog/item/7ed96dfb028c9b354f4aeab1.html

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2012-05-30 21:14

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