Servlet (一)

 

package cn.sasa.serv;

import java.io.IOException;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

public class QuickStart implements Servlet{

    @Override
    public void init(ServletConfig config) throws ServletException {
        //对象创建时执行
        //默认第一次访问时创建
        System.out.println("init......");
        //获取servlet-name
        String name = config.getServletName();
        System.out.println(name);
        //获取初始化参数
        String paramId = config.getInitParameter("id");
        System.out.println(paramId);
        //ServletContext对象
        ServletContext context = config.getServletContext();
    }

    @Override
    public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
        //每次访问都执行
        System.out.println("service......");
        HttpServletResponse resp = (HttpServletResponse)res;
        resp.getWriter().write("hi");;
    }
    
    @Override
    public void destroy() {
        //销毁
        System.out.println("destroy.......");
    }

    @Override
    public ServletConfig getServletConfig() {
        //配置信息
        return null;
    }

    @Override
    public String getServletInfo() {
        return null;
    }

}