【servlet】 第一个servlet

简单打印haha

Helloyt.java

package day01;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Helloyt extends HttpServlet{
    public void init(ServletConfig config) throws ServletException{
        super.init(config);
    }

    public void doGet(HttpServletRequest req,HttpServletResponse resp)
    throws IOException,ServletException{
        doPost(req,resp);
    }

    public void doPost(HttpServletRequest req,HttpServletResponse resp)
            throws IOException,ServletException{
        resp.setContentType("text/html;charset=utf-8");
        resp.getOutputStream().println("hehe");
//        resp.getWriter().println("haha");

    } 

    public void destroy(){
        super.destroy();
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

  <servlet>
    <servlet-name>helloyt</servlet-name>
    <servlet-class>day01.Helloyt</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>helloyt</servlet-name>
    <url-pattern>/helloyt</url-pattern>
  </servlet-mapping>

</web-app>