标签：
src-> new-> servlet
可见，继承自HttpServlet
dopost doget分别是post请求和get请求时调用的
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
/**
* Created by DESTR on 2016/10/10.
*/
@WebServlet(name = "FirstServlet")
public class FirstServlet extends HttpServlet
{
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("<p>Hello post</p>");
out.flush();
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("<p>Hello get</p>");
out.flush();
out.close();
}
}
url 映射：
在web.xml里添加<servlet-mapping>元素
<?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_3_1.xsd" version="3.1"> <servlet> <servlet-name>FirstServlet</servlet-name> <servlet-class>FirstServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>FirstServlet</servlet-name> <url-pattern>/firstServlet/Hello</url-pattern> </servlet-mapping> </web-app>
<url-pattern>元素表明访问路径
运行后：
【java web学习笔记(2)】first servlet
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原文地址：http://www.cnblogs.com/dreamingsheep/p/5947538.html
