ProcessBuilder无法返回JSon字符串

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class ProcessBuilderExample {
    public static void main(String[] args) {
        // 定义要执行的命令
        List<String> command = new ArrayList<>();
        command.add("your-command"); // 替换为你的命令
        command.add("--option"); // 替换为你的选项
        command.add("--json-output"); // 替换为生成JSON输出的选项

        ProcessBuilder processBuilder = new ProcessBuilder(command);

        try {
            // 启动进程
            Process process = processBuilder.start();

            // 获取命令的输出
            String jsonOutput = readProcessOutput(process.getInputStream());

            // 等待命令执行完成
            int exitCode = process.waitFor();

            if (exitCode == 0) {
                // 命令成功执行，处理JSON输出
                System.out.println("JSON Output: " + jsonOutput);
            } else {
                // 命令执行失败，处理错误
                System.err.println("Command failed with exit code: " + exitCode);
            }
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }

    private static String readProcessOutput(InputStream inputStream) throws IOException {
        StringBuilder output = new StringBuilder();
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
            String line;
            while ((line = reader.readLine()) != null) {
                output.append(line);
            }
        }
        return output.toString();
    }
}