📄 write.java

📁 可以让初学者有一个感性的认识

💻 JAVA

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import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Write extends HttpServlet
{
	File f=null;
	String use="yes";

	public void init(ServletConfig config) throws ServletException
	{
		super.init(config);
	}

	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
	{
		String content=request.getParameter("content");
		PrintWriter out=response.getWriter();
		response.setContentType("text/html;charset=GB2312");
		out.println("<HTML><BODY>");
		f=new File("d:/Tomcat/webapps/root","story.txt");
		if(use.startsWith("yes"))
		{
			synchronized(f)
			{
				use="using";	
				try
				{
					RandomAccessFile file=new RandomAccessFile(f,"rw");
					file.seek(file.length());
					file.writeUTF(content);
					file.close();
					use="yes";
					out.print("<BR>"+"The content has been written.");
				} catch(IOException e){}
			}
		}
		else
			out.print("The story is being written, please wait.");
		out.println("</BODY></HTML>");
	}

	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
	{
		doPost(request,response);
	}

}

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