mall整合SpringBoot+MyBatis搭建基本骨架

本文主要讲解mall整合SpringBoot+MyBatis搭建基本骨架，以商品品牌为例实现基本的CRUD操作及通过PageHelper实现分页查询。

mysql数据库环境搭建

• 下载并安装mysql5.7版本，下载地址：dev.mysql.com/downloads/i…
• 设置数据库帐号密码：root root
• 下载并安装客户端连接工具Navicat,下载地址：www.formysql.com/xiazai.html
• 创建数据库mall
• 导入mall的数据库脚本，脚本地址：github.com/macrozheng/…

项目使用框架介绍

SpringBoot

SpringBoot可以让你快速构建基于Spring的Web应用程序，内置多种Web容器(如Tomcat)，通过启动入口程序的main函数即可运行。

PagerHelper

MyBatis分页插件，简单的几行代码就能实现分页，在与SpringBoot整合时，只要整合了PagerHelper就自动整合了MyBatis。

PageHelper.startPage(pageNum, pageSize);
//之后进行查询操作将自动进行分页
List brandList = brandMapper.selectByExample(new PmsBrandExample());
//通过构造PageInfo对象获取分页信息，如当前页码，总页数，总条数
PageInfo pageInfo = new PageInfo(list);
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Druid

alibaba开源的数据库连接池，号称Java语言中最好的数据库连接池。

Mybatis generator

MyBatis的代码生成器，可以根据数据库生成model、mapper.xml、mapper接口和Example，通常情况下的单表查询不用再手写mapper。

项目搭建

使用IDEA初始化一个SpringBoot项目

添加项目依赖

在pom.xml中添加相关依赖。

<parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.1.3.RELEASEversion>
        <relativePath/> 
    parent>
    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-aopartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        
        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelper-spring-boot-starterartifactId>
            <version>1.2.10version>
        dependency>
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druid-spring-boot-starterartifactId>
            <version>1.1.10version>
        dependency>
        
        <dependency>
            <groupId>org.mybatis.generatorgroupId>
            <artifactId>mybatis-generator-coreartifactId>
            <version>1.3.3version>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.15version>
        dependency>
    dependencies>
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修改SpringBoot配置文件

在application.yml中添加数据源配置和MyBatis的mapper.xml的路径配置。

server:
  port: 8080

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/mall?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    username: root
    password: root

mybatis:
  mapper-locations:
    - classpath:mapper/*.xml
    - classpath*:com/**/mapper/*.xml
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项目结构说明

Mybatis generator 配置文件

配置数据库连接，Mybatis generator生成model、mapper接口及mapper.xml的路径。

xml version="1.0" encoding="UTF-8"?>


<generatorConfiguration>
    <properties resource="generator.properties"/>
    <context id="MySqlContext" targetRuntime="MyBatis3" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <property name="javaFileEncoding" value="UTF-8"/>
        
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
        
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>
        
        <commentGenerator type="com.macro.mall.tiny.mbg.CommentGenerator">
            
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/>
            <property name="addRemarkComments" value="true"/>
        commentGenerator>
        
        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.connectionURL}"
                        userId="${jdbc.userId}"
                        password="${jdbc.password}">
            
            <property name="nullCatalogMeansCurrent" value="true" />
        jdbcConnection>
        
        <javaModelGenerator targetPackage="com.macro.mall.tiny.mbg.model" targetProject="mall-tiny-01\src\main\java"/>
        
        <sqlMapGenerator targetPackage="com.macro.mall.tiny.mbg.mapper" targetProject="mall-tiny-01\src\main\resources"/>
        
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.macro.mall.tiny.mbg.mapper"
                             targetProject="mall-tiny-01\src\main\java"/>
        
        <table tableName="pms_brand">
            <generatedKey column="id" sqlStatement="MySql" identity="true"/>
        table>
    context>
generatorConfiguration>
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运行Generator的main函数生成代码

package com.macro.mall.tiny.mbg;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * 用于生产MBG的代码
 * Created by macro on 2018/4/26.
 */
public class Generator {
    public static void main(String[] args) throws Exception {
        //MBG 执行过程中的警告信息
        List warnings = new ArrayList();
        //当生成的代码重复时，覆盖原代码
        boolean overwrite = true;
        //读取我们的 MBG 配置文件
        InputStream is = Generator.class.getResourceAsStream("/generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();

        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        //创建 MBG
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        //执行生成代码
        myBatisGenerator.generate(null);
        //输出警告信息
        for (String warning : warnings) {
            System.out.println(warning);
        }
    }
}
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添加MyBatis的Java配置

用于配置需要动态生成的mapper接口的路径

package com.macro.mall.tiny.config;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;

/**
 * MyBatis配置类
 * Created by macro on 2019/4/8.
 */
@Configuration
@MapperScan("com.macro.mall.tiny.mbg.mapper")
public class MyBatisConfig {
}

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实现Controller中的接口

实现PmsBrand表中的添加、修改、删除及分页查询接口。

package com.macro.mall.tiny.controller;

import com.macro.mall.tiny.common.api.CommonPage;
import com.macro.mall.tiny.common.api.CommonResult;
import com.macro.mall.tiny.mbg.model.PmsBrand;
import com.macro.mall.tiny.service.PmsBrandService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;

import java.util.List;


/**
 * 品牌管理Controller
 * Created by macro on 2019/4/19.
 */
@Controller
@RequestMapping("/brand")
public class PmsBrandController {
    @Autowired
    private PmsBrandService demoService;

    private static final Logger LOGGER = LoggerFactory.getLogger(PmsBrandController.class);

    @RequestMapping(value = "listAll", method = RequestMethod.GET)
    @ResponseBody
    public CommonResult> getBrandList() {
        return CommonResult.success(demoService.listAllBrand());
    }

    @RequestMapping(value = "/create", method = RequestMethod.POST)
    @ResponseBody
    public CommonResult createBrand(@RequestBody PmsBrand pmsBrand) {
        CommonResult commonResult;
        int count = demoService.createBrand(pmsBrand);
        if (count == 1) {
            commonResult = CommonResult.success(pmsBrand);
            LOGGER.debug("createBrand success:{}", pmsBrand);
        } else {
            commonResult = CommonResult.failed("操作失败");
            LOGGER.debug("createBrand failed:{}", pmsBrand);
        }
        return commonResult;
    }

    @RequestMapping(value = "/update/{id}", method = RequestMethod.POST)
    @ResponseBody
    public CommonResult updateBrand(@PathVariable("id") Long id, @RequestBody PmsBrand pmsBrandDto, BindingResult result) {
        CommonResult commonResult;
        int count = demoService.updateBrand(id, pmsBrandDto);
        if (count == 1) {
            commonResult = CommonResult.success(pmsBrandDto);
            LOGGER.debug("updateBrand success:{}", pmsBrandDto);
        } else {
            commonResult = CommonResult.failed("操作失败");
            LOGGER.debug("updateBrand failed:{}", pmsBrandDto);
        }
        return commonResult;
    }

    @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
    @ResponseBody
    public CommonResult deleteBrand(@PathVariable("id") Long id) {
        int count = demoService.deleteBrand(id);
        if (count == 1) {
            LOGGER.debug("deleteBrand success :id={}", id);
            return CommonResult.success(null);
        } else {
            LOGGER.debug("deleteBrand failed :id={}", id);
            return CommonResult.failed("操作失败");
        }
    }

    @RequestMapping(value = "/list", method = RequestMethod.GET)
    @ResponseBody
    public CommonResult> listBrand(@RequestParam(value = "pageNum", defaultValue = "1") Integer pageNum,
                                                        @RequestParam(value = "pageSize", defaultValue = "3") Integer pageSize) {
        List brandList = demoService.listBrand(pageNum, pageSize);
        return CommonResult.success(CommonPage.restPage(brandList));
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    @ResponseBody
    public CommonResult brand(@PathVariable("id") Long id) {
        return CommonResult.success(demoService.getBrand(id));
    }
}

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添加Service接口

package com.macro.mall.tiny.service;


import com.macro.mall.tiny.mbg.model.PmsBrand;

import java.util.List;

/**
 * PmsBrandService
 * Created by macro on 2019/4/19.
 */
public interface PmsBrandService {
    List listAllBrand();

    int createBrand(PmsBrand brand);

    int updateBrand(Long id, PmsBrand brand);

    int deleteBrand(Long id);

    List listBrand(int pageNum, int pageSize);

    PmsBrand getBrand(Long id);
}

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实现Service接口

package com.macro.mall.tiny.service.impl;

import com.github.pagehelper.PageHelper;
import com.macro.mall.tiny.mbg.mapper.PmsBrandMapper;
import com.macro.mall.tiny.mbg.model.PmsBrand;
import com.macro.mall.tiny.mbg.model.PmsBrandExample;
import com.macro.mall.tiny.service.PmsBrandService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * PmsBrandService实现类
 * Created by macro on 2019/4/19.
 */
@Service
public class PmsBrandServiceImpl implements PmsBrandService {
    @Autowired
    private PmsBrandMapper brandMapper;

    @Override
    public List listAllBrand() {
        return brandMapper.selectByExample(new PmsBrandExample());
    }

    @Override
    public int createBrand(PmsBrand brand) {
        return brandMapper.insertSelective(brand);
    }

    @Override
    public int updateBrand(Long id, PmsBrand brand) {
        brand.setId(id);
        return brandMapper.updateByPrimaryKeySelective(brand);
    }

    @Override
    public int deleteBrand(Long id) {
        return brandMapper.deleteByPrimaryKey(id);
    }

    @Override
    public List listBrand(int pageNum, int pageSize) {
        PageHelper.startPage(pageNum, pageSize);
        brandMapper.selectByExample(new PmsBrandExample());
        return brandMapper.selectByExample(new PmsBrandExample());
    }

    @Override
    public PmsBrand getBrand(Long id) {
        return brandMapper.selectByPrimaryKey(id);
    }
}

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项目源码地址

github.com/macrozheng/…

公众号

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转载于:https://juejin.im/post/5cf7c4a7e51d4577790c1c50