java，执行命令并获取标准输出

package Runtime;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

public class OutputTest {

    //获取子进程的标准输出
    public static void main(String[] args) {
        System.out.println("------------------test windows commands --------------------");
        Runtime runtime = Runtime.getRuntime();

        String command = "ipconfig";
        Process process = null;
        try {
            process = runtime.exec(command);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        String charsetName = "GB2312";
        //charsetName = "utf-8";
        InputStreamReader reader;
        try {
            reader = new InputStreamReader(process.getInputStream(), charsetName);
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            return ;
        }
        BufferedReader bufferedReader = new BufferedReader(reader);

        String line;
        try {

            //System.out.println(bufferedReader);
            while(true) {
                line = bufferedReader.readLine();
                if (line == null)
                    break;
                System.out.println(line);
            }
            process.waitFor();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }//main ends
}