【Javaweb】【Servlet】简单验证用户的登陆
【Servlet】简单验证用户的登陆
点击查看代码 | jsp
<%--
Created by IntelliJ IDEA.
User: xrilang
Date: 30/12/2021
Time: 17:31
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/login" name="myform" id="myform" method="post" enctype="application/x-www-form-urlencoded">
<label for="username">用户名</label>
<input name="username" id="username" type="text" placeholder="用户名">
<label for="password">密码</label>
<input name="password" id="password" type="password">
<input type="submit" name="btn" value="登录">
</form>
</body>
</html>
点击查看代码 | Servlet
import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;
import java.io.IOException;
@WebServlet(name = "login", value = "/login")
public class login extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
String name = request.getParameter("username");
String pwd = request.getParameter("password");
// System.out.println(name+" | "+pwd);
if(name.equals("")){
response.getWriter().write("<h1>请输入账号</h1><br/><a href='index.jsp'>返回</a>");
}else if(pwd.equals("")){
response.getWriter().write("<h1>请输入密码</h1><br/><a href='index.jsp'>返回</a>");
}else if(name.equals("mllt9920")){
if(pwd.equals("123456")){
response.getWriter().write("<h1>登录成功</h1><br/>欢迎您,"+name+"<br/><a href='index.jsp'>返回</a>");
}else{
response.getWriter().write("<h1>密码错误</h1><br/><a href='index.jsp'>返回</a>");
}
}else{
response.getWriter().write("<h1>账号错误</h1><br/><a href='index.jsp'>返回</a>");
}
}
}
点击查看代码 | pom.xml的
<dependencies>
<!-- https://mvnrepository.com/artifact/jakarta.servlet/jakarta.servlet-api -->
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>5.0.0</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.servlet.jsp/jakarta.servlet.jsp-api -->
<dependency>
<groupId>jakarta.servlet.jsp</groupId>
<artifactId>jakarta.servlet.jsp-api</artifactId>
<version>3.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
Tomcat 10
版 权 声 明
作者：萌狼蓝天
QQ：3447902411（仅限技术交流，添加请说明方向)
转载请注明原文链接：https://www.cnblogs.com/zwj/p/javaweb_servlet_login_20211230.html
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