IT兄弟連 Java Web教程 經典案例2
- 2019 年 10 月 5 日
- 筆記
版權聲明：本文為博主原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接和本聲明。
本文鏈接：https://blog.csdn.net/ITXDL123/article/details/90051798
案例需求：寫一個用戶登錄的html頁面有賬號和密碼，並在登錄的Servlet中獲取登錄的賬號和密碼，如果賬號是abc密碼是123則向瀏覽器輸出登錄成功，否則向瀏覽器輸出登錄失敗。
案例實現：
● html 頁面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form id="login_form" action="login.do" method="get" >
賬號:<input type="text" name="acc_no" ><br>
密碼:<input type="password" name="acc_password"><br>
<input type="submit" value="登錄" />
</form>
</body>
</html>
● servlet類
package com.xdl.servlet;
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 XdlLoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
// 獲取頁面請求參數
String acc_no = request.getParameter("acc_no");
String acc_password = request.getParameter("acc_password");
PrintWriter pw = response.getWriter();
if("abc".equals(acc_no) && "123".equals(acc_password)){
pw.write("登錄成功");
}else{
pw.write("登錄失敗");
}
pw.close();
}
}
● web.xml配置
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.xdl.servlet.XdlLoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/login.do</url-pattern>
</servlet-mapping>
