使用powershell中的Get-Content作为java输入获取额外的字符

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

public class PowerShellExample {
    public static void main(String[] args) {
        try {
            // 构建PowerShell命令
            String command = "powershell.exe Get-Content -Path 'C:\\path\\to\\file.txt' -Encoding UTF8";

            // 创建ProcessBuilder对象，并设置命令和工作目录
            ProcessBuilder processBuilder = new ProcessBuilder("cmd.exe", "/c", command);
            processBuilder.directory();

            // 启动进程并获取输出
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));

            // 读取输出
            String line;
            StringBuilder output = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                output.append(line);
            }

            // 输出结果
            System.out.println("额外的字符：" + output.toString());

            // 等待进程结束
            process.waitFor();
            process.destroy();
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}