java调用.bat,.cmd或执行cmd命令并将输出结果显示的代码_java程序bat文件对话框中输入数据经过计算显示结果-优快云博客

本文链接：https://blog.youkuaiyun.com/yixiaoqingyuz/article/details/3738870

这个Java代码示例展示了如何调用.bat或.cmd文件，执行CMD命令，并将命令的输出结果显示在页面上。通过Runtime.getRuntime().exec()方法执行批处理文件，并使用InputStream和BufferedReader读取并显示执行结果。

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<%@ page contentType="text/html; charset=utf-8" language="java" pageEncoding="utf-8"%>
<%@page import="java.io.InputStream"%>
<%@page import="java.io.InputStreamReader"%>
<%@page import="java.util.ArrayList"%>
<%@page import="java.util.List"%>
<%@page import="java.io.BufferedReader"%>
<%@page import="java.util.Iterator"%>
<%@page import="java.io.IOException"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>执行命令</title>
</head>
<%
  InputStream in = null;
  InputStreamReader ir = null;
  List list = new ArrayList();
  String line = "";

  String msg = "";
  String batfile = request.getParameter("batfile");
  if(batfile==null){batfile = "";}
  if(!batfile.equals("")){
  try {
   Process p = Runtime.getRuntime().exec(batfile);
   in = p.getInputStream();
   ir = new InputStreamReader(in);
   BufferedReader br = new BufferedReader(ir);
   while ((line= br.readLine()) != null) {
    list.add(line);
   }
   if (p.waitFor()!=0) {
    msg = "批处理执行失败，请检查批处理文件是否正确！";
   }
   else
   {
    msg = "批处理执行成功！";
   }
   p.destroy();
   Iterator it = list.iterator();
   while (it.hasNext()) {
    line = "";
    line = line + (String)it.next();
   }
   it = null;
   br.close();
   br = null;
   ir.close();
   ir = null;
   in.close();
   in = null;
   p.destroy();
   p=null;
  } catch (IOException e) {
   msg = "io异常,请检查指定的批处理文件是否存在！";
  }
  catch (InterruptedException e) {
   msg = "中断异常！";
  }
  catch (IllegalArgumentException e){
   msg = "命令为空！";
  }
  catch(Exception e){
   msg = "未知异常！";
  }
  }
  else
  {
   msg = "请输入指令或者命令文件的路径！";
  }

%>
<body>
<form name="form1" method="post" action="/fileupload/updatepro.jsp">
<table width="642" height="170" border="1" style="width: 936px">
    <tr>
      <td width="119" style="width: 92px"><div align="right" style="width: 104px">批处理文件：</div></td>
      <td width="507" colspan="2" style="width: 806px; height: 48px"><input type="text" name="batfile" value="<%=batfile %>" style="width: 659px">
        <input type="submit" name="Submit" value="执行批处理。。。" style="width: 130px"> </td>
    </tr>
    <tr>
      <td colspan="3"><%=msg %><br/><%=line %></td>
    </tr>
</table>
</form>
</body>
</html>