Servlet 基础01

package test.demo1;

import java.io.IOException;
import java.io.PrintWriter;

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

public class MyServletDemo extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 1L;

@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub

PrintWriter out=resp.getWriter();
out.print("hi");
out.close();

}

@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub

doGet(req,resp);
}

}

</pre></p><p></p><p>注意其中doGet和doPost不能用super.doGet() && super.doPost()</p><p>接下来web.xml文件中有</p><p><pre class="html" name="code" snippet_file_name="blog_20160309_3_3505969" code_snippet_id="1602735"><?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>ServletDemo</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>MyServletDemo</servlet-name>
<servlet-class>test.demo1.MyServletDemo</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>MyServletDemo</servlet-name>
<url-pattern>/hello.html</url-pattern>
</servlet-mapping>

</web-app>