解决JAVA Process死锁

    // 处理子进程输出的线程，防止死锁
    static class StreamHandler extends Thread {

        private InputStream in;

        public StreamHandler(InputStream in) {
            this.in = in;
        }

        public void run() {
            try {
                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(in));
                String line = null;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
    }

           ProcessBuilder pb = new ProcessBuilder();
            // 添加命令
            pb.command(cmd);
            // 重定向错误输出，将错误输出合并到inputStream
            pb.redirectErrorStream(true);
            // 启动子进程
            Process p = pb.start();
            // 启动协助进程的子线程，将Process的inputStream输出，防止死锁
            new StreamHandler(p.getInputStream()).start();
            // 开始执行
            int w = p.waitFor();
            p.destroy();