综合案例-查询所有-后台-前端

 

 

 

 

package com.itheima.mapper;

import com.itheima.pojo.Brand;
import org.apache.ibatis.annotations.ResultMap;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface BrandMapper {

    /*
    * 查询所有
    * */
    @Select("select * from tb_brand")
    @ResultMap("brandResultMap")
    List<Brand> selectAll();
}

package com.itheima.pojo;

public class Brand {
    // id 主键
    private Integer id;
    // 品牌名称
    private String brandName;
    // 企业名称
    private String companyName;
    // 排序字段
    private Integer ordered;
    // 描述信息
    private String description;
    // 状态：0：禁用  1：启用
    private Integer status;


    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getBrandName() {
        return brandName;
    }

    public void setBrandName(String brandName) {
        this.brandName = brandName;
    }

    public String getCompanyName() {
        return companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

    public Integer getOrdered() {
        return ordered;
    }

    public void setOrdered(Integer ordered) {
        this.ordered = ordered;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Integer getStatus() {
        return status;
    }
    //逻辑视图
    public String getStatusStr(){
        if (status == null){
            return "未知";
        }
        return status == 0 ? "禁用":"启用";
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    @Override
    public String toString() {
        return "Brand{" +
                "id=" + id +
                ", brandName='" + brandName + '\'' +
                ", companyName='" + companyName + '\'' +
                ", ordered=" + ordered +
                ", description='" + description + '\'' +
                ", status=" + status +
                '}';
    }
}

package com.itheima.service.impl;

import com.itheima.mapper.BrandMapper;
import com.itheima.pojo.Brand;
import com.itheima.service.BrandService;
import com.itheima.util.SqlSessionFactoryUtils;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;

import java.util.List;

public class BrandServiceImpl implements BrandService {
    //1. 创建SqlSessionFactory 工厂对象
    SqlSessionFactory factory = SqlSessionFactoryUtils.getSqlSessionFactory();

    @Override
    public List<Brand> selectAll() {
        //2. 获取SqlSession对象
        SqlSession session = factory.openSession();

        //3. 获取BrandMapper
        BrandMapper mapper = session.getMapper(BrandMapper.class);

        //4. 调用方法
        List<Brand> brands = mapper.selectAll();

        //5.释放资源
        session.close();

        return brands;
    }
}

package com.itheima.service;

import com.itheima.pojo.Brand;

import java.util.List;

public interface BrandService {
    /*
    * 查询所有
    * */
    List<Brand> selectAll();
}

package com.itheima.util;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

public class SqlSessionFactoryUtils {

    private static SqlSessionFactory sqlSessionFactory;

    static {
        //静态代码块会随着类的加载而自动执行，且只执行一次
        try {
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static SqlSessionFactory getSqlSessionFactory(){
        return sqlSessionFactory;
    }
}

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.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);
    }

}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.mapper.BrandMapper">

    <resultMap id="brandResultMap" type="brand">
        <result property="brandName" column="brand_name" />
        <result property="companyName" column="company_name" />
    </resultMap>
</mapper>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <typeAliases>
        <package name="com.itheima.pojo"/>
    </typeAliases>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///db1?useSSL=false"/>
                <property name="username" value="root"/>
                <property name="password" value="1234"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
       <!--扫描mapper-->
        <package name="com.itheima.mapper"/>
    </mappers>
</configuration>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .el-table .warning-row {
            background: oldlace;
        }

        .el-table .success-row {
            background: #f0f9eb;
        }
    </style>

</head>
<body>
<div id="app">

    <!--搜索表单-->
    <el-form :inline="true" :model="brand" class="demo-form-inline">

        <el-form-item label="当前状态">
            <el-select v-model="brand.status" placeholder="当前状态">
                <el-option label="启用" value="1"></el-option>
                <el-option label="禁用" value="0"></el-option>
            </el-select>
        </el-form-item>

        <el-form-item label="企业名称">
            <el-input v-model="brand.companyName" placeholder="企业名称"></el-input>
        </el-form-item>

        <el-form-item label="品牌名称">
            <el-input v-model="brand.brandName" placeholder="品牌名称"></el-input>
        </el-form-item>

        <el-form-item>
            <el-button type="primary" @click="onSubmit">查询</el-button>
        </el-form-item>
    </el-form>

    <!--按钮-->

    <el-row>

        <el-button type="danger" plain>批量删除</el-button>
        <el-button type="primary" plain @click="dialogVisible = true">新增</el-button>

    </el-row>
    <!--添加数据对话框表单-->
    <el-dialog
            title="编辑品牌"
            :visible.sync="dialogVisible"
            width="30%"
            >

        <el-form ref="form" :model="brand" label-width="80px">
            <el-form-item label="品牌名称">
                <el-input v-model="brand.brandName"></el-input>
            </el-form-item>

            <el-form-item label="企业名称">
                <el-input v-model="brand.companyName"></el-input>
            </el-form-item>

            <el-form-item label="排序">
                <el-input v-model="brand.ordered"></el-input>
            </el-form-item>

            <el-form-item label="备注">
                <el-input type="textarea" v-model="brand.description"></el-input>
            </el-form-item>

            <el-form-item label="状态">
                <el-switch v-model="brand.status"
                           active-value="1"
                           inactive-value="0"
                ></el-switch>
            </el-form-item>


            <el-form-item>
                <el-button type="primary" @click="addBrand">提交</el-button>
                <el-button @click="dialogVisible = false">取消</el-button>
            </el-form-item>
        </el-form>

    </el-dialog>


    <!--表格-->
    <template>
        <el-table
                :data="tableData"
                style="width: 100%"
                :row-class-name="tableRowClassName"
                @selection-change="handleSelectionChange"
        >
            <el-table-column
                    type="selection"
                    width="55">
            </el-table-column>
            <el-table-column
                    type="index"
                    width="50">
            </el-table-column>

            <el-table-column
                    prop="brandName"
                    label="品牌名称"
                    align="center"
            >
            </el-table-column>
            <el-table-column
                    prop="companyName"
                    label="企业名称"
                    align="center"
            >
            </el-table-column>
            <el-table-column
                    prop="ordered"
                    align="center"
                    label="排序">
            </el-table-column>
            <el-table-column
                    prop="status"
                    align="center"
                    label="当前状态">
            </el-table-column>

            <el-table-column
                    align="center"
                    label="操作">

                <el-row>
                    <el-button type="primary">修改</el-button>
                    <el-button type="danger">删除</el-button>
                </el-row>

            </el-table-column>

        </el-table>
    </template>

    <!--分页工具条-->
    <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="currentPage"
            :page-sizes="[5, 10, 15, 20]"
            :page-size="5"
            layout="total, sizes, prev, pager, next, jumper"
            :total="400">
    </el-pagination>

</div>


<script src="js/vue.js"></script>
<script src="element-ui/lib/index.js"></script>
<script src="js/axios-0.18.0.js"></script>
<link rel="stylesheet" href="element-ui/lib/theme-chalk/index.css">


<script>
    new Vue({
        el: "#app",

        mounted(){
          // 当页面加载完成后，发送异步请求，获取数据

            let _this=this;

            axios({
                method:"get",
                url:"http://localhost:8080/brand-case1/selectAllServlet"
                }).then(function (resp) {
                 _this.tableData = resp.data;
            })
        },

        methods: {
            tableRowClassName({row, rowIndex}) {
                if (rowIndex === 1) {
                    return 'warning-row';
                } else if (rowIndex === 3) {
                    return 'success-row';
                }
                return '';
            },
            // 复选框选中后执行的方法
            handleSelectionChange(val) {
                this.multipleSelection = val;

                console.log(this.multipleSelection)
            },
            // 查询方法
            onSubmit() {
                console.log(this.brand);
            },
            // 添加数据
            addBrand(){
                console.log(this.brand);
            },

            //分页
            handleSizeChange(val) {
                console.log(`每页 ${val} 条`);
            },
            handleCurrentChange(val) {
                console.log(`当前页: ${val}`);
            }

        },
        data() {
            return {
                // 当前页码
                currentPage: 4,
                // 添加数据对话框是否展示的标记
                dialogVisible: false,

                // 品牌模型数据
                brand: {
                    status: '',
                    brandName: '',
                    companyName: '',
                    id:"",
                    ordered:"",
                    description:""
                },
                // 复选框选中数据集合
                multipleSelection: [],
                // 表格数据
                tableData: [{
                    brandName: '华为',
                    companyName: '华为科技有限公司',
                    ordered: '100',
                    status: "1"
                }, {
                    brandName: '华为',
                    companyName: '华为科技有限公司',
                    ordered: '100',
                    status: "1"
                }, {
                    brandName: '华为',
                    companyName: '华为科技有限公司',
                    ordered: '100',
                    status: "1"
                }, {
                    brandName: '华为',
                    companyName: '华为科技有限公司',
                    ordered: '100',
                    status: "1"
                }]
            }
        }
    })

</script>

</body>
</html>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>brand-case1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.source>14</maven.compiler.source>
        <maven.compiler.target>14</maven.compiler.target>
    </properties>


    <dependencies>
        <!--Servlet-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>


        <!--MyBatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.5</version>
        </dependency>
        <!--MySQL-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.34</version>
        </dependency>


        <!--fastjson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>

            </plugin>
        </plugins>
    </build>
</project>