ProcessBuilder BufferedReader read()阻塞

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class ProcessBuilderExample {
    public static void main(String[] args) {
        try {
            // 创建ProcessBuilder对象，并指定要执行的命令
            ProcessBuilder processBuilder = new ProcessBuilder("ls", "-l");

            // 启动外部进程
            Process process = processBuilder.start();

            // 获取进程的输入流
            InputStream inputStream = process.getInputStream();

            // 创建BufferedReader对象，用于读取输入流
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

            // 读取输入流的内容
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                System.out.println(line);
            }

            // 关闭输入流和进程
            bufferedReader.close();
            process.destroy();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}