尚硅谷2022版Java Web之Servlet入门笔记

先上代码

add.html

    
    


    

        名称：

        价格：

        库存：

        备注：

        
    

AddServlet.java

package com.shangguigu.servlets;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class AddServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String fname = request.getParameter("fname");
        String priceStr = request.getParameter("price");
        Integer price = Integer.parseInt(priceStr);
        String fcountStr = request.getParameter("fcount");
        Integer fcount = Integer.parseInt(fcountStr);
        String remark = request.getParameter("remark");

        System.out.println("fname =" + fname);
        System.out.println("price =" + price);
        System.out.println("fcount =" + fcount);
        System.out.println("remark =" + remark);
    }
}

web.xml

    
        AddServlet
        com.shangguigu.servlets.AddServlet
    
    
        AddServlet
        /add
        
    

具体步骤

在src下新建java类com.shangguigu.servlet.AddServlet

让AddServlet继承HttpServlet

public class AddServlet extends HttpServlet{
    
}

HttpServlet类在servlet-api.jar中，要导包

方法一：把包导到library中

方法二：添加tomcat依赖

“文件”-“项目结构”然后“Modules”-“项目文件夹（例如hello）”-“Dependencies”-“+”-“Library”-“tomcat”

 servlet-api.jar已经被导入成功

doPost帮助你响应post请求

直接doPost快捷打出