String[] commands = new String[]{"sh","-c","dmidecode -t processor | grep 'ID'"};
            Process process = Runtime.getRuntime().exec (commands);
    
            InputStreamReader ir = new InputStreamReader(process.getInputStream());
            InputStreamReader ir2 = new InputStreamReader(process.getErrorStream());
            BufferedReader input = new BufferedReader (ir);
            BufferedReader input2 = new BufferedReader (ir2);
            String line,result="";
            while ((line = input.readLine ()) != null) {
                result+=line;
            }
            String line2,result2="";
            while ((line2 = input2.readLine ()) != null) {
                result2+=line2;
            }
0.部署环境为 oracle linux
1.当tomcat正常启动运行的情况下调用可以正常获取到 result的值。

2.当tomcat被crontab的重启任务重启以后无法获取到result值(有时候能获取到)，为空，错误信息result2="sh: dmidecode: command not found"

3.人工root权限通过tomcat/bin 目录下的 ./shutdown.sh + ./start.sh 重启以后是能够正常获取的。
4.
初步怀疑是权限问题。crontab的任务是root权限下建立的。