案例-新增品牌

 

package com.itheima.web;

import com.alibaba.fastjson.JSON;
import com.itheima.pojo.Brand;
import com.itheima.service.BrandService;

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

@WebServlet("/addServlet")
public class AddServlet extends HttpServlet {
    private BrandService brandService = new BrandService();

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

        /*//1. 接受数据   request.getParameter不能接受json数据
        String brandName = request.getParameter("brandName");
        System.out.println(brandName);*/

        //1. 获取请求体（接受数据）
        BufferedReader br = request.getReader();
        String params = br.readLine();

        //2. 将JSON字符串转为Java对象
        Brand brand = JSON.parseObject(params, Brand.class);

        //3. 调用service添加
        brandService.add(brand);

        //4. 响应成功标识
        response.getWriter().write("success");
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doGet(request, response);
    }

}
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>添加品牌</title>
</head>
<body>
<h3>添加品牌</h3>
<form action="" method="post">
    品牌名称：<input id="brandName" name="brandName"><br>
    企业名称：<input id="companyName" name="companyName"><br>
    排序：<input id="ordered" name="ordered"><br>
    描述信息：<textarea rows="5" cols="20" id="description" name="description"></textarea><br>
    状态：
    <input type="radio" name="status" value="0">禁用
    <input type="radio" name="status" value="1">启用<br>

    <input type="button" id="btn"  value="提交">
</form>

<script src="js/axios-0.18.0.js"></script>

<script>
    //1. 因为要用异步响应所以没用提交按钮，提交按钮是同步的
    // 给按钮绑定单击事件
    document.getElementById("btn").onclick = function () {
        // 将表单数据转为json
        let formData = {
            brandName:"",
            companyName:"",
            ordered:"",
            description:"",
            status:"",
        };
        // 获取表单数据
        let brandName = document.getElementById("brandName").value;
        //设置数据
        formData.brandName = brandName;

        // 获取表单数据
        let companyName = document.getElementById("companyName").value;
        //设置数据
        formData.companyName = companyName;

        // 获取表单数据
        let ordered = document.getElementById("ordered").value;
        //设置数据
        formData.ordered = ordered;

        // 获取表单数据
        let description = document.getElementById("description").value;
        //设置数据
        formData.description = description;

        // 获取表单数据
        let status = document.getElementsByName("status");
        //遍历status里的数据 1 0
        //使用checked那个被选中checked就为true
        //然后进入if把数据再设置给formData.status
        for (let i = 0; i < status.length; i++) {
            if (status[i].checked){
                formData.status = status[i].value;
            }
        }
        //然后把所有设置过的数据输出
        console.log(formData);//console.log:它可以接受一个或多个参数，将它们连接起来输出

        //2. 发送ajax请求
        axios({
            method:"post",
            url:"http://localhost:8080/brand-demo/addServlet",
            data:formData
        }).then(function (resp) {
            //判断响应数据是否为success
            if (resp.data == "success"){
                // 重新查询
                location.href = "http://localhost:8080/brand-demo/brand.html";
            }
        })
    }
</script>


</body>
</html>

 

posted @ 2023-07-03 19:13  Karlshell  阅读(15)  评论(0)    收藏  举报