6-3自由编程

来源：6-3 自由编程

RobinZang

2019-09-27 17:20:21

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>请输入要查询的单词</title>
</head>
<body>
<form action="/JspPracCode/direct/check">
	<input name="word" placeholder="请输入要查询的单词"/>
	<input type="submit" value="查询"><br/>
</form>
</body>
</html>

package com.imooc.servlet.driect;

import java.io.IOException;
import java.io.PrintWriter;
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 CheckLoginServlet
 */
@WebServlet("/direct/check")
public class CheckLoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public CheckLoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf8");
		response.setContentType("text/html;charset=utf-8");
		// 接收请求发来的参数
		String word = request.getParameter("word");
		Map<String,String> fruit=new HashMap<String,String>();
		fruit.put("apple", "苹果");
		fruit.put("banana", "香蕉");
		fruit.put("orange", "橘子");
		if(fruit.containsKey(word)) {
			request.setAttribute("value",fruit.get(word));
			request.getRequestDispatcher("/success.jsp").forward(request,response);
		} else {
			HttpSession session = request.getSession();
			session.setAttribute("str", "没有找到对应的单词解释！");
			response.sendRedirect("/JspPracCode/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 value = (String)request.getAttribute("value");
		String html = "<h1 style='color:blue'>" + value + "</h1>";
		response.getWriter().println(html);
	%>
</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 str = (String) session.getAttribute("str");
		String html = "<h1 style='color:red'>" + str + "</h1>";
		response.getWriter().println(html);
	%>
</body>
</html>

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