实现 java 执行 cmd 命令，打印输出，等待cmd 完全执行完成后才执行下面代码

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//执行windows 下 ejtag命令

final Process p = Runtime.getRuntime().exec("D:\\loongson\\OtherTools\\ejtag-debug-cygwin\\ejtag_debug_usb.exe -e 'source D:/ejtag-debug-cygwin/configs/config.ls1dspiUpload'");
//获取进程的标准输入流
final InputStream is1 = p.getInputStream();
//获取进城的错误流
final InputStream is2 = p.getErrorStream();
//启动两个线程，一个线程负责读标准输出流，另一个负责读标准错误流
new Thread() {
public void run() {
BufferedReader br1 = new BufferedReader(new InputStreamReader(is1));
try {
String line1 = null;
while ((line1 = br1.readLine()) != null) {
if (line1 != null){
System.out.println("=AA==========line1======"+line1);
    }
}
} catch (IOException e) {
e.printStackTrace();
}
finally{
try {
is1.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}.start();

new Thread() {
public void run() {
BufferedReader br2 = new BufferedReader(new InputStreamReader(is2));
try {
String line2 = null ;
while ((line2 = br2.readLine()) != null ) {
if (line2 != null){
System.out.println("=AA==========line2======"+line2);
}
}
} catch (IOException e) {
e.printStackTrace();
}
finally{
try {
is2.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}.start();
p.waitFor();
p.destroy();