java操作外部程序

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//用JAVA调用外部应用程序
<%@   page   language="java" contentType="text/html; charset=gb2312" import="java.io.*"%>
<jsp:useBean id="UseSet" class="netoa.UserSet" scope="page"/>
<%
//当加载页面时，就自动打开聊天程序 jzl 2007-2-26
try{
  String username =(String)session.getAttribute("user_name");
  String passwd = request.getParameter("password");

  String strAbsPath=application.getRealPath("");
  String exeName = strAbsPath+"SendUdp.exe "+username+" "+passwd+" ";

  Runtime runtime = Runtime.getRuntime();
  runtime.exec(exeName);


  //runtime.exec("c://SendUdp.exe "+username+" "+passwd+" ");

  //String strAbsPath=application.getRealPath("");
  //strAbsPath = strAbsPath + "//";
  //out.println(strAbsPath);

}catch(Exception e){
  //提示加载聊天程序出错
  out.print("<script>alert('加载聊天程序出错！');</script>");
}
%>

//用JAVA关闭外部应用程序
<%@   page   language="java" contentType="text/html; charset=gb2312" import="java.io.*"%>
<%
try{
  Runtime runtime = Runtime.getRuntime();
  runtime.exec("taskkill /IM SendUdp.exe ");
}catch(Exception e){
  out.print("<script>alert('卸载聊天程序出错！');</script>");
}
%>