java代码关闭tomcat程序及出现问题解析

package test;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;public class tomcatStop {  public static void main(String[] args) {    // TODO Auto-generated method stub    System.out.println("访问已超出日访问量");    String command = "D://apache-tomcat-8.5.39//bin//shutdown.bat";// 关闭tomcat命令    try {      callCommand(command);    } catch (IOException e) {      System.out.println("执行命令时出错：" + e.getMessage());    }  }  public static void callCommand(String command) throws IOException {    Runtime runtime = Runtime.getRuntime();// 返回与当前的Java应用相关的运行时对象    // 指示Java虚拟机创建一个子进程执行指定的可执行程序，并返回与该子进程对应的Process对象实例    Process process = runtime.exec(command);    runtime.gc();// 运行垃圾回收器    String line = null;    String content = "";    BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));    while ((line = br.readLine()) != null) {      content += line + "/r/n";    }    System.out.println(content);  }}