Springboot run os command

package com.example.demo;

import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Collectors;

@Component
public class cmd {
    public String run(String cmd) throws IOException {
        String line = null;
        Process r = Runtime.getRuntime().exec(cmd);
        InputStreamReader in = new InputStreamReader(r.getInputStream());
        BufferedReader br = new BufferedReader(in);
        return br.lines().collect(Collectors.joining("</br>"));
    }
}