每周总结第九周

本周进行了团队作业的二阶段任务：

任务很多，要完成对于一阶段的后端的功能实现：

展示sevlet代码

添加

package com.itheima.web.servlet;

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

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;
import java.util.List;

@WebServlet("/addServlet")
public class AddServlet extends HttpServlet {

    private BrandService brandService = new BrandServiceImpl();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.接收品牌的数据

        BufferedReader br = request.getReader();
        String params = br.readLine();//json字符串

        //转为Brand对象
        Brand brand = JSON.parseObject(params,Brand.class);

        //2.调用service
        brandService.add(brand);

        //3.响应一个成功的标识
        response.getWriter().write("success");

    }

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

删除

package com.itheima.web.servlet;

import com.alibaba.fastjson.JSON;
import com.itheima.service.BrandService;
import com.itheima.service.impl.BrandServiceImpl;
import org.apache.ibatis.annotations.Param;

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

@WebServlet("/deleteByIdsServlet")
public class deletByIdsServlet extends HttpServlet {

    private BrandService brandService = new BrandServiceImpl();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        //1.接受数据[1,2,3]
        BufferedReader br = request.getReader();
        String params = br.readLine();

        //转为int[]
        int[] ids = JSON.parseObject(params,int[].class);

        //2.调用service
        brandService.deleteByIds(ids);

        //3.响应成功的标识
        response.getWriter().write("success");
    }

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

查询所有

package com.itheima.web.servlet;

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

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

@WebServlet("/selectAllServlet")
public class SelectAllServlet extends HttpServlet {

    private BrandService brandService = new BrandServiceImpl();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.调用service查询
        List<Brand> brands = brandService.selectAll();

        //2.转为JSON
        String jsonString = JSON.toJSONString(brands);

        //3.写数据
        response.setContentType("text/json;charset=utf-8");
        response.getWriter().write(jsonString);

    }

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

条件模糊查询

package com.itheima.web.servlet;

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

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

@WebServlet("/selectByPageAndConditionServlet")
public class selectByPageAndConditionServlet extends HttpServlet {

    private BrandService brandService = new BrandServiceImpl();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.接收参数 当前页码 和 每页展示条数      url?currentPage=1&&pageSize=5
        String _currentPage = request.getParameter("currentPage");
        String _pageSize = request.getParameter("pageSize");


        int currentPage = Integer.parseInt(_currentPage);
        int pageSize = Integer.parseInt(_pageSize);

        //获取对应的查询条件对象
        BufferedReader br = request.getReader();
        String params = br.readLine(); // json字符串

        //转为Brand
        Brand brand = JSON.parseObject(params,Brand.class);

        //2.调用service查询
        PageBean<Brand> pageBean = brandService.selectByPageAndCondition(currentPage,pageSize,brand);

        //3.转为JSON
        String jsonString = JSON.toJSONString(pageBean);

        //4.写数据
        response.setContentType("text/json;charset=utf-8");
        response.getWriter().write(jsonString);
    }

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

修改

package com.itheima.web.servlet;

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

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

@WebServlet("/updateByIdServlet")
public class UpdateServlet extends HttpServlet {

    private BrandService brandService = new BrandServiceImpl();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.接收品牌的数据

        BufferedReader br = request.getReader();
        String params = br.readLine();//json字符串

        //转为Brand对象
        Brand brand = JSON.parseObject(params,Brand.class);

        //2.调用service
        brandService.update(brand);

        //3.响应一个成功的标识
        response.getWriter().write("success");
    }

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