怎么用java代码运行linux命令

发布网友发布时间：2022-04-23 14:49

共1个回答

热心网友时间：2022-06-05 17:37

展开3全部

以下方法支持Linux和windows两个系统的命令行调用。还用到了apache的lang工具包commons-lang3-3.1.jar来判断操作系统类型、也用到了和log4j-1.2.16.jar来打印日志。至于rm -rf 是否能成功删除文件，可以手动去调用命令行试试。

private String callCmd(String cmd) throws InterruptedException, UnHandledOSException, ExecuteException {
        if(SystemUtils.IS_OS_LINUX){
            try {
                // 使用Runtime来执行command，生成Process对象
                Process process = Runtime.getRuntime().exec(
                        new String[] { "/bin/sh", "-c", cmd });
                int exitCode = process.waitFor();
                // 取得命令结果的输出流
                InputStream is = process.getInputStream();
                // 用一个读输出流类去读
                InputStreamReader isr = new InputStreamReader(is);
                // 用缓冲器读行
                BufferedReader br = new BufferedReader(isr);
                String line = null;
                StringBuilder sb = new StringBuilder();
                while ((line = br.readLine()) != null) {
                    System.out.println(line);
                    sb.append(line);
                }
                is.close();
                isr.close();
                br.close();
                return sb.toString();
            } catch (java.lang.NullPointerException e) {
                System.err.println("NullPointerException " + e.getMessage());
                logger.error(cmd);
            } catch (java.io.IOException e) {
                System.err.println("IOException " + e.getMessage());
            }
            throw new ExecuteException(cmd + "执行出错！");
        }

        if(SystemUtils.IS_OS_WINDOWS){
            Process process;
            try {
                //process = new ProcessBuilder(cmd).start();
                String[] param_array = cmd.split("[\\s]+");
                ProcessBuilder pb = new ProcessBuilder(param_array);
                process = pb.start();
                /*process=Runtime.getRuntime().exec(cmd);*/
                int exitCode = process.waitFor();
                InputStream is = process.getInputStream();
                InputStreamReader isr = new InputStreamReader(is);
                BufferedReader br = new BufferedReader(isr);
                String line;
                StringBuilder sb = new StringBuilder();

                while ((line = br.readLine()) != null) {
                    System.out.println(line);
                    sb.append(line);
                }
                is.close();
                isr.close();
                br.close();
                return sb.toString();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            throw new ExecuteException(cmd + "执行出错！");
        }

        throw new UnHandledOSException("不支持本操作系统");
    }