java中通過servle4t實現(xiàn)瀏覽器服務(wù)器的

ava中servlet類，首先建一個包c(diǎn)n.java.servlet,同樣建一個cn.java.entity的包用來建立實體類。

本節(jié)是Java-web階段第52課時，通過繼承servlet類實現(xiàn)了，從瀏覽器端發(fā)送請求到服務(wù)器（這時候在console輸出了hello servlet），然后通過輸出流向外輸出紅色字體（hello servlet））。這時候從瀏覽器發(fā)送請求用的是doGet方法。HttpServletRequest和HttpServletRequest可以看成是特殊的實體類，即平時所看見的request方法和response方法。

package cn.java.Servlet;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.ServletOutputStream;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.xml.ws.Response;

@WebServlet("/aaa")

public class HomeServlet extends HttpServlet{

@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

System.out.println("hello servlet");

String str="<h2 style='color:red'>hello servlet</h2>";

ServletOutputStream so=response.getOutputStream();

so.write(str.getBytes("utf-8"));

}

@Override

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

// TODO Auto-generated method stub

super.doPost(req, resp);

}

}