老师，代码还有什么可以改进的吗？还有servlet响应的时候为什么没有出现乱码？
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="/servlet_advanced/word/result" method="get">
<input type="text" name="word" placeholder="请输入要查询的单词">
<input type="submit" value="查询">
</form>
</body>
</html>
package com.imooc.servlet.word;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class WordResultServlet
*/
@WebServlet("/word/result")
public class WordResultServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public WordResultServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Map<String,String> map=new HashMap();
map.put("apple","苹果");
map.put("banana","香蕉");
map.put("orange","橘子");
String word=request.getParameter("word");
HttpSession session=request.getSession();
if(map.containsKey(word)==true) {
request.setAttribute("word",word);
request.setAttribute("result",map.get(word));
request.getRequestDispatcher("/success.jsp").forward(request, response);
}else if(map.containsKey(word)==false){
session.setAttribute("result","没有找到对应的单词解释");
response.sendRedirect("/servlet_advanced/fail.jsp");
}
}
}
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
String word=(String)request.getAttribute("word");
out.println("<h1 style='color:blue'>"+word+"</h1>");
%>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
String result=(String)session.getAttribute("result");
out.println("<h1 style='color:red'>"+result+"</h1>");
%>
</body>
</html>
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