servlet读文件

package com.yuan;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ServletTextAction extends HttpServlet {

?/**
? *
? */
?public void doGet(HttpServletRequest request, HttpServletResponse response)
???throws ServletException, IOException {

??response.setContentType("text/html");
??response.setCharacterEncoding("gb2312");
??PrintWriter out = response.getWriter();
??
??File file = new File("e://yuan.txt");
??if(file.exists()){
???FileReader reader? = new FileReader(file);
???BufferedReader bufferReader = new BufferedReader(reader);
???
???String line = null;
???while((line = bufferReader.readLine())!=null){
????out.print(line);
???}
??}else{
???out.print("文件不存在");
??}
??
??
??out.flush();
??out.close();
?}
?
?/**
? * The doPost method of the servlet. <br>
? */
?public void doPost(HttpServletRequest request, HttpServletResponse response)
???throws ServletException, IOException {
?? doGet(request,response);
?}

}