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利用Java调用可执行命令

2005-04-09 10:38 579 查看

package test;
/**
* Add one sentence class summary here.
* Add class description here.
*
* @author lxx
* @version 1.0, 2004-11-16
*/
public class TestCmd {
    public TestCmd(){}
   /* public void main(String args[]){
        try {
        Process process = Runtime.getRuntime().exec("cmd.exe /c start http://www.csdn.net"); //登录网站
          Process process = Runtime.getRuntime().exec("cmd.exe /c start ping 10.144.98.100"); //调用Ping命令
        }catch (Exception e)
        {
            e.printStackTrace();
            }

      }
    } */

//在项目下建立一个名为hello的文件夹
    public static void main(String[] args) {
        System.out.println(System.getProperty("user.dir"));
        createFolder("hello");
      }
     private static void createFolder(String folderName) {
       String temp = System.getProperty("user.dir") + java.io.File.separator+ folderName;
       java.io.File f = new java.io.File(temp);
       f.mkdirs();
     }
}

在Java程序中获取当前运行程序的路径

import java.io.*;public class Test {
       public static void main(String[] args) {
              File directory = new File(".");
              try {
                     File newPath = new File(directory.getCanonicalPath()+"NewFolder");
                     newPath.mkdir();
              }catch(Exception exp)
              {
                     exp.printStackTrace();
              }
       }
}
//File directory       = new File(".");
//directory.getCanonicalPath();取得当前路径

在Jsp页面中调用Ping命令---PingIP.jsp
<%@ page language="java" contentType="text/html; charset=gb2312" import="java.io.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Ping IP测试页面</title>
</head>
<body>
<div align="center">
<h2>Ping IP测试页面</h2>
</div>
<%
   Runtime runtime = Runtime.getRuntime();
   Process process =null;
   String line=null;
   InputStream is =null;
   InputStreamReader isr=null;
   BufferedReader br =null;
   String ip="www.sina.com.cn"; //待Ping的地址
    try
   {
       process =runtime.exec("ping "+ip);
       is = process.getInputStream();
       isr=new InputStreamReader(is);
       br =new BufferedReader(isr);
       out.println("<pre>");
       while( (line = br.readLine()) != null )
       {
           out.println(line);
           out.flush();
       }
       out.println("</pre>");
       is.close();
       isr.close();
       br.close();
   }
   catch(IOException e )
   {
       out.println(e);
       runtime.exit(1);
   }
%>
</body>
</html>

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标签： java string exception null file class

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