📄 doread.java

📁 《jsp编程起步》里面的所有源代码

💻 JAVA

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import java.io.*;
import java.util.*;

import javax.servlet.http.*;
import javax.servlet.*;

public class doRead extends HttpServlet{
	public void doGet(HttpServletRequest request,HttpServletResponse response)
		throws ServletException,IOException{
		response.setContentType("text/html; charset=GB2312");	
		PrintWriter pw = response.getWriter();
		printHeader(request,response);
		printFooter(request,response);
	
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)
		throws ServletException,IOException{
		printHeader(request,response);
		
		printFooter(request,response);
	
	}
	public void printHeader(HttpServletRequest request,HttpServletResponse response)
		throws ServletException,IOException{
		PrintWriter pw = response.getWriter();
		pw.println("<html>");
    		pw.println("<head><title>::读留言::</title>");
    		pw.println("<script language='javascript'>");
		pw.println("	function openwrite(){");
		pw.println("	window.open('http://127.0.0.1:8080/write_page.html','write','top=0,left=0,width=250,height=160,scrollbars=no,status=no,toolbar=no,mmenubar=no,location=no');");
		pw.println("}");
		pw.println("</script>");
    		pw.println("</head>");
    		pw.println("<body bgcolor=#ffffff>");
    		pw.println("");
    		pw.println("<font size=2 color=#555555 face='Verdana, Arial, Helvetica'>");
		pw.println("<a href='javascript:openwrite();'>我要留言</a><br>");
    		pw.println();
    		
    		File f=new File("GuestBook.txt");
		if(!f.exists()){
			if(!f.createNewFile())pw.println("Create File Error!");
			return ;
		}
		FileReader fr=new FileReader(f);
		char[] chars=new char[(int)f.length()];
		fr.read(chars,0,(int)f.length());
		String str=new String(chars);
		fr.close();
		pw.println(str);
    	}
    	
	public void printFooter(HttpServletRequest request
			,HttpServletResponse response)
		throws ServletException,IOException{
		PrintWriter pw = response.getWriter();
		
		
		pw.println("</font>");
		pw.println("</body>");
		pw.println("</html>");
    		
	}
}

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