Java调用外部程序

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
public class CmdTest {
    private static final long serialVersionUID = -2650474785662737262L;
    public static void main(String[] args) throws Exception {
        Runtime runtime = Runtime.getRuntime();
        Process p = runtime.exec("c:\\test.bat");
        DealStream errStream = new DealStream(p.getErrorStream(),"Err");
        DealStream outStream = new DealStream(p.getInputStream(),"Out");
        new Thread(errStream).start();
        new Thread(outStream).start();
        int exitValue = p.waitFor();
        System.out.println("exitValue -- > " + exitValue);
    }
}
class DealStream implements Runnable{
    private InputStream is;
    private String type;
    public DealStream(InputStream is,String type){
        this.is = is;
        this.type = type;
    }
    public void run(){
        try{
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String temp = null;
            while((temp = br.readLine()) != null){
                System.out.println(type + "-->" + temp