JSP-ServLet 一个简单的密码核对-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_9635/article/details/82038631

本文介绍了一个简单的登录系统实现过程，包括创建登录页面(Login.jsp)、处理登录请求的Servlet(LoginServlet)及登录成功后的显示页面(LoginSuccess.jsp)。通过表单提交用户名和密码，并在Servlet中验证，验证成功后跳转到登录成功页面。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

First Step:

Create One Jsp file: [color=blue]Login[/color].jsp

<body>
This is my JSP page. <br>
<form action="[color=red]LoginServlet[/color]" method="post">
<table>
<tr><td>Login</td><td><input type="text" name="username" value=""/></td></tr>
<tr><td>Password</td><td><input type="password" name="pwd" value=""/></td></tr>
<tr><td><input type="submit" name="sub" value="Submit"/></td><td><input type="Reset" name="Ret" value="Reset"/></td></tr>
</table>
</form>
</body>

Second Step:

Create One ServLet File: [color=red]LoginServLet[/color].java
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name =request.getParameter("username");
String password=request.getParameter("pwd");
HttpSession session=request.getSession();
if (name.equals("dgy")&&password.equals("123")){
System.out.println("login Successfully");
session.setAttribute("username",name);
session.setAttribute("password",password);
request.getRequestDispatcher("LoginSuccess.jsp").forward(request, response);
}else{
System.out.println("Oops!!! pls correct");
response.sendRedirect("[color=blue]Login[/color].jsp");
}
}

Third Step:

Creat another jsp: LoginSuccess.jsp

<body>
This is my JSP page. <br>
Username:${username}
Password:${password}
</body>