了解tomcat 3 -- tomcat容器

tomcat是jsp的容器

web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>web01</display-name>
  
  <servlet>
  	<servlet-name>login</servlet-name>
  	<servlet-class>com.web01.LoginController</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>login</servlet-name>
  	<url-pattern>/login.do</url-pattern>
  </servlet-mapping>
  
  <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>
</web-app>

servlet代码：

package com.web01;

import java.io.IOException;

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

public class LoginController extends HttpServlet {

	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		req.setAttribute("参数", "参数内容");
		req.getRequestDispatcher("WEB-INF/login.jsp").forward(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

	}
	
	
}

这是一个基本的servlet ，包含了参数绑定，定位到jsp位置

顺便说下 jsp九大内置对象：request,response,out,application,page,pageContext,session,exption,config

jsp编译的class文件会存放在tomcat的work文件中，java文件编译后的class文件会存放在web-inf中