软件1班20240607
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="/demo/login">前往登录</a>
</body>
</html>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>aa</servlet-name>
<servlet-class>com.yanyu.Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>aa</servlet-name>
<url-pattern>/demo/login</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>bb</servlet-name>
<servlet-class>com.yanyu.Demmo</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>bb</servlet-name>
<url-pattern>/list</url-pattern>
</servlet-mapping>
</web-app>
package com.yanyu;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
public class Login extends HttpServlet {
// 重写 父类方法 ctrl o
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// super.doGet(req, resp); 调用 父类的方法 super == 父类 的对象
// 设置 响应的类型和 编码格式
/* 浏览器 --》 服务器 的 数据 request
服务器 --》 浏览器 的 数据 response
* request
* response
* */
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
// 获取响应对象
PrintWriter out = response.getWriter();// ctrl alt v
// out.println("");
out.println("hello3");
// 多行 编辑 alt 鼠标拖动
out.println(" ");
out.println("");
out.println("");
out.println(" ");
out.println(" ");
out.println(" ");
out.println(" Document ");
out.println("");
out.println("");
out.println(" 登录界面
");
out.println(" ");
// src = href = action 都是 路径 都是 url
out.println(" 账号");
out.println("
");
out.println(" 密码");
out.println(" ");
out.println("
");
out.println(" ");
out.println(" ");
out.println("");
out.println("");
}
}
package com.yanyu;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class Demmo extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 获取 浏览器 的数据 request
// 设置 请求 编码
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");// CTRL alt v
String pass = request.getParameter("password");// CTRL alt v
// 通过 name 属性的 值 username 去 拿到 账号
System.out.println(username);/// 打印到服务器控制台 4232354
System.out.println(pass);/// 打印到服务器控制台 4232354
}
}
