0 注意

1. java的runtime不会加载系统的环境变量，需要自己手动设置，在.bat文件中

set path=C:\Program Files\R\R-3.4.2\bin

2. java调用.bat时，当前路径是jar包上级目录或者是项目的根目录

1 出现cmd窗口

          public static void runbat(String batPath) {
            String cmd = "cmd /c start "+ batPath ;// pass
            try {
                Process ps = Runtime.getRuntime().exec(cmd);
                ps.waitFor();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
            catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("child thread donn");
        }

2 不出现cmd窗口

         public static void runBatWithoutCmd(String batPath) {
          try {
                Process ps = Runtime.getRuntime().exec(batPath);
                InputStream in = ps.getInputStream();
                int c;
                while ((c = in.read()) != -1) {
                }
                in.close();
                ps.waitFor();

            } catch (IOException ioe) {
                ioe.printStackTrace();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
      }