1.创建maven项目
2.添加servlet依赖
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
</dependencies>
3.更换webapp下的web.xml
<?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"
metadata-complete="true">
</web-app>
4.在java包下编写servlet类
//继承HttpServlet ,重写doGet和doPost方法
public class HelloServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("进入了doget方法");
// resp.getOutputStream();
PrintWriter writer = resp.getWriter();
writer.println("Hello World!");
}
}
5.配置servlet在web.xml
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>top.chenyp.servlet.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
6.配置tomcat
7.运行