src/main/java/com/hwua/erhai/controller/DoCarDeleteServlet.java

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package com.hwua.erhai.controller;

import com.alibaba.fastjson.JSONObject;
import com.hwua.erhai.dao.ICarDao;
import com.hwua.erhai.dao.impl.CarDaoImpl;
import com.hwua.erhai.entity.Car;
import com.hwua.erhai.service.ICarService;
import com.hwua.erhai.service.impl.MockCarService;
import com.hwua.erhai.vo.DoCarDeleteResponse;
import org.apache.commons.lang3.StringUtils;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "DoCarDeleteServlet", value = "/doCarDelete")
public class DoCarDeleteServlet extends HttpServlet {
    ICarDao carDao = new CarDaoImpl();

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

    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setCharacterEncoding("utf-8");//设置服务器端编码
        response.setContentType("text/html;charset=utf-8");//设置浏览器解码

        String carId = request.getParameter("carId");
        if (StringUtils.isBlank(carId)) {
            response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
            response.getWriter().write("请求参数为空");
            return;
        }
        long car = carDao.deleteCar(Long.parseLong(carId));
//        Car car = carService.deleteCar(Long.parseLong(carId));
        if (car == 0) {
            response.setStatus(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
            response.getWriter().write("删除汽车失败");
            return;
        }
        response.setStatus(HttpServletResponse.SC_OK);
        DoCarDeleteResponse deleteResponse = new DoCarDeleteResponse(
                HttpServletResponse.SC_OK,"删除汽车成功",Long.parseLong(carId)
        );
    response.getWriter().write(JSONObject.toJSONString(deleteResponse));
        }
    }