java调用shell

java代码内调用shell命令:

Runtime.getRuntime().exec(String[] command);
// command 是一个三个元素数组 一：命令位置；二：-c表示先执行第一个参数；三：你的命令。

Process process = null;
try {
     process = Runtime.getRuntime().exec(new String[] { "/bin/bash", "-c", cmd });
     } catch (IOException ioException) {
         ioException.printStackTrace();
   }
 if (process == null) {
     log.error("execute shell command faild, command is [{}]", cmd);
     return "";
  }

将process 用Callable封装

    private static class ShellCallable implements Callable<String> {

        private Process process;

        ShellCallable(Process process) {
            this.process = process;
        }

        @Override
        public String call() throws Exception {
            InputStream input = process.getInputStream();
            String result = getResult(input).trim();
            if (result.equals("")) {
                InputStream error = process.getErrorStream();
                String errorInfo = getResult(error);
                if (!errorInfo.equals("")) {
                    log.error("shell command execute faild, error info is [{}]", errorInfo.trim());
                }
            }
            return result;
        }

        private String getResult(InputStream input) throws Exception {
            byte[] buffer = new byte[1024];
            StringBuffer answer = new StringBuffer();
            int len = -1;
            while (true) {
                len = input.read(buffer);
                if (len == -1) {
                    break;
                }
                String str = new String(buffer, 0, len);
                answer.append(str);
            }
            return answer.toString();
        }

    }

Future<String> future = pool.submit(new ShellCallable(process));

参考: https://blog.csdn.net/margin_0px/article/details/83822275