📄 rafile.jsp

📁 机械工业出版社的《jsp2.0动态网站开发实例指南》的源代码

💻 JSP

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<!--RAfile.jsp-->
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.io.*"%>
<html>
<head>
<title>RandomAccessFile</title>
</head>
<body>
<%	
	String pa=request.getParameter("pa");
	if(pa==null)pa="";
	String pb=request.getParameter("pb");
	if(pb==null)pb="";
	String time=request.getParameter("time");
	if(time==null)time="";
	if(!pa.equals("")&&!pb.equals("")&&!time.equals("")){
		try{
			RandomAccessFile raf=new RandomAccessFile("E:/temp1/randomaccessfile.txt","rw");
			//935
			raf.seek(935);
			raf.writeChars(time);
			//823
			raf.seek(823);
			raf.writeChars(pb);
			//715
			raf.seek(715);
			raf.writeChars(pa);
			raf.close();
			FileInputStream in=new FileInputStream("E:/temp1/randomaccessfile.txt");
			BufferedInputStream bufferin=new BufferedInputStream(in);
			byte b[]=new byte[20];
			int n=0;
			String temp=null;
			while((n=bufferin.read(b))!=-1){
				temp=new String (b,0,n);
				out.print(temp);
			}
			bufferin.close();
			in.close();
		}
		catch(IOException e){	
			out.print("error!");	
		}
	}
	else{
		response.sendRedirect("RAF_form.jsp");
	}
%>
</body>
</html>

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