【Servlet】servlet入门

新建一个项目，点击 src 选择 New|Servlet .创建一个FirstSer.java文件 

package com.servlet;

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;

/**
 * Servlet implementation class FirstSer
 */
public class FirstSer extends HttpServlet {
	private static final long serialVersionUID = 1L;  //为该servlet设置一个UID号
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public FirstSer() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html;charset=utf-8");  //设置输出流的类型和编码类型
		PrintWriter out = response.getWriter();   //得到输出流
		out.println("");
		out.println("");
		out.println("");
		out.println("servlet program");
		out.println("");
		out.println("");
		out.flush();   //清楚缓冲区
		out.close();   //关闭输出流
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

}

 

配置web.xml 

   
    the description of my component
    FirstSer
    FirstSer
    com.servlet.FirstSer
  
    
    FirstSer
    /Servlet