依赖
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
web.xml
4.0版本
<?xml version="1.0" encoding="UTF-8"?>
<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>
<!--起个名称-->
<servlet-name>login</servlet-name>
<!--映射一个类-->
<servlet-class>org.example.servlet.MyHttpServlet</servlet-class>
</servlet>
<servlet-mapping>
<!--访问url-pattern配置的路径会进入servlet-name映射的类中-->
<servlet-name>login</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
映射类
继承HttpServlet,重写请求方法即可
public class MyHttpServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.getSession().setAttribute("msg","登录成功!");
// 转发到目标视图
req.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(req,resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}