jsp call shell or linux command

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page language="java" import="java.io.*,java.lang.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>
This is my JSP page. 
<a href="/ftp/ftp/ftpgetlog.sh">下载</a> 
<%
Process p=null;
BufferedReader br =null;
BufferedReader ebr =null;
String line=null;
String eline=null;
StringBuffer sBuffer=null;
StringBuffer esBuffer=null;
try{
String fpath=request.getContextPath()+File.separator+"ftp"+File.separator;
String pathShell=fpath+"unself_account.sh";
String newPath="/home/was/jxkh_prj/bin/unself_account.sh";
p=Runtime.getRuntime().exec(new String[]{"/bin/sh","-c",newPath,"20140828","8881011200004433"});%>
pathShell==<%=pathShell%> 
process==<%=p%> 
waitFor==<%=p.waitFor()%> 
exitValue==<%=p.exitValue()%> 
InputStream==<%=p.getInputStream()%> 
ErrorStream==<%=p.getErrorStream()%> 

<%br = new LineNumberReader(new InputStreamReader(p.getInputStream()));
ebr = new LineNumberReader(new InputStreamReader(p.getErrorStream()));
esBuffer= new StringBuffer();
sBuffer= new StringBuffer();
while((eline=ebr.readLine())!=null){
esBuffer.append(eline);
}
while((line=br.readLine())!=null){
%>
line==<%=line%> 
<%sBuffer.append(line);
}%>
sBuffer==<%=sBuffer.toString()%> 
esBuffer==<%=esBuffer.toString()%> 
<%
}catch(IOException e){
throw e;
}finally{
if(null!=br){
br.close();
}
if(null!=ebr){
ebr.close();
}
}
%>

</body>
</html>

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