String cmdstring = "chmod a+x test.sh";
 Process proc = Runtime.getRuntime().exec(cmdstring);
 proc.waitFor(); //阻塞，直到上述命令执行完
 cmdstring = "bash test.sh"; //这里也可以是ksh等
 proc = Runtime.getRuntime().exec(cmdstring);
 // 注意下面的操作
 string ls_1;
 BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(proc.getInputStream());
 while ( (ls_1=bufferedReader.readLine()) != null);
 bufferedReader.close();
 proc.waitFor();