【jsp】为什么出现JSP?

来源：互联网发布：5355端口编辑：程序博客网时间：2024/06/04 18:04

首先，用servlet写一个页面：

package com.it.demo;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;public class HtmlServlet extends HttpServlet {protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html;charset=UTF-8");PrintWriter writer = response.getWriter();//动态的响应html页面writer.write("<!DOCTYPE html>");writer.write("<html>");writer.write("<head>");writer.write("<meta charset='UTF-8'>");writer.write("<title>Insert title here</title>");writer.write("</head>");writer.write("<body>");writer.write("<h1>这个页面很繁琐</h1>");writer.write("</body>");writer.write("</html>");}protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

效果：

右击查看源代码：

Servlet是java代码，JSP是java标签。用servlet编写页面很繁琐，需要注意和多余的代码很多（比如引号）,并且它把页面代码和逻辑代码捆绑在一起，不易于维护。这么多繁琐的代码，引入jsp标签，便可轻松解决。

阅读全文

0 0