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:https://dev.mysql.com/downloads/installer/

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:http://www.formysql.com/xiazai.html

创建数据库mall

导入mall的数据库脚本,脚本地址:https://github.com/macrozheng/mall-learning/blob/master/document/sql/mall.sql

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ListbrandList=brandMapper.selectByExample(newPmsBrandExample());//通过构造PageInfo对象获取分页信息,如当前页码,总页数,总条数PageInfopageInfo=newPageInfo(list);Copy to clipboardErrorCopied

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。

org.springframework.bootspring-boot-starter-parent2.1.3.RELEASEorg.springframework.bootspring-boot-starter-weborg.springframework.bootspring-boot-starter-actuatororg.springframework.bootspring-boot-starter-aoporg.springframework.bootspring-boot-starter-testtestcom.github.pagehelperpagehelper-spring-boot-starter1.2.10com.alibabadruid-spring-boot-starter1.1.10org.mybatis.generatormybatis-generator-core1.3.3mysqlmysql-connector-java8.0.15Copy to clipboardErrorCopied

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/*.xmlCopy to clipboardErrorCopied

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。

        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"

        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">Copy to clipboardErrorCopied

运行Generator的main函数生成代码

packagecom.macro.mall.tiny.mbg;importorg.mybatis.generator.api.MyBatisGenerator;importorg.mybatis.generator.config.Configuration;importorg.mybatis.generator.config.xml.ConfigurationParser;importorg.mybatis.generator.internal.DefaultShellCallback;importjava.io.InputStream;importjava.util.ArrayList;importjava.util.List;/**

* 用于生产MBG的代码

* Created by macro on 2018/4/26.

*/publicclassGenerator{publicstaticvoidmain(String[]args)throwsException{//MBG 执行过程中的警告信息Listwarnings=newArrayList();//当生成的代码重复时,覆盖原代码booleanoverwrite=true;//读取我们的 MBG 配置文件InputStreamis=Generator.class.getResourceAsStream("/generatorConfig.xml");ConfigurationParsercp=newConfigurationParser(warnings);Configurationconfig=cp.parseConfiguration(is);is.close();DefaultShellCallbackcallback=newDefaultShellCallback(overwrite);//创建 MBGMyBatisGeneratormyBatisGenerator=newMyBatisGenerator(config,callback,warnings);//执行生成代码myBatisGenerator.generate(null);//输出警告信息for(Stringwarning:warnings){System.out.println(warning);}}}Copy to clipboardErrorCopied

添加MyBatis的Java配置

用于配置需要动态生成的mapper接口的路径

packagecom.macro.mall.tiny.config;importorg.mybatis.spring.annotation.MapperScan;importorg.springframework.context.annotation.Configuration;/**

* MyBatis配置类

* Created by macro on 2019/4/8.

*/@Configuration@MapperScan("com.macro.mall.tiny.mbg.mapper")publicclassMyBatisConfig{}Copy to clipboardErrorCopied

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。

packagecom.macro.mall.tiny.controller;importcom.macro.mall.tiny.common.api.CommonPage;importcom.macro.mall.tiny.common.api.CommonResult;importcom.macro.mall.tiny.mbg.model.PmsBrand;importcom.macro.mall.tiny.service.PmsBrandService;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.stereotype.Controller;importorg.springframework.validation.BindingResult;importorg.springframework.web.bind.annotation.*;importjava.util.List;/**

* 品牌管理Controller

* Created by macro on 2019/4/19.

*/@Controller@RequestMapping("/brand")publicclassPmsBrandController{@AutowiredprivatePmsBrandServicedemoService;privatestaticfinalLoggerLOGGER=LoggerFactory.getLogger(PmsBrandController.class);@RequestMapping(value="listAll",method=RequestMethod.GET)@ResponseBodypublicCommonResult>getBrandList(){returnCommonResult.success(demoService.listAllBrand());}@RequestMapping(value="/create",method=RequestMethod.POST)@ResponseBodypublicCommonResultcreateBrand(@RequestBodyPmsBrandpmsBrand){CommonResultcommonResult;intcount=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);}returncommonResult;}@RequestMapping(value="/update/{id}",method=RequestMethod.POST)@ResponseBodypublicCommonResultupdateBrand(@PathVariable("id")Longid,@RequestBodyPmsBrandpmsBrandDto,BindingResultresult){CommonResultcommonResult;intcount=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);}returncommonResult;}@RequestMapping(value="/delete/{id}",method=RequestMethod.GET)@ResponseBodypublicCommonResultdeleteBrand(@PathVariable("id")Longid){intcount=demoService.deleteBrand(id);if(count==1){LOGGER.debug("deleteBrand success :id={}",id);returnCommonResult.success(null);}else{LOGGER.debug("deleteBrand failed :id={}",id);returnCommonResult.failed("操作失败");}}@RequestMapping(value="/list",method=RequestMethod.GET)@ResponseBodypublicCommonResult>listBrand(@RequestParam(value="pageNum",defaultValue="1")IntegerpageNum,@RequestParam(value="pageSize",defaultValue="3")IntegerpageSize){ListbrandList=demoService.listBrand(pageNum,pageSize);returnCommonResult.success(CommonPage.restPage(brandList));}@RequestMapping(value="/{id}",method=RequestMethod.GET)@ResponseBodypublicCommonResultbrand(@PathVariable("id")Longid){returnCommonResult.success(demoService.getBrand(id));}}Copy to clipboardErrorCopied

添加Service接口

packagecom.macro.mall.tiny.service;importcom.macro.mall.tiny.mbg.model.PmsBrand;importjava.util.List;/**

* PmsBrandService

* Created by macro on 2019/4/19.

*/publicinterfacePmsBrandService{ListlistAllBrand();intcreateBrand(PmsBrandbrand);intupdateBrand(Longid,PmsBrandbrand);intdeleteBrand(Longid);ListlistBrand(intpageNum,intpageSize);PmsBrandgetBrand(Longid);}Copy to clipboardErrorCopied

实现Service接口

packagecom.macro.mall.tiny.service.impl;importcom.github.pagehelper.PageHelper;importcom.macro.mall.tiny.mbg.mapper.PmsBrandMapper;importcom.macro.mall.tiny.mbg.model.PmsBrand;importcom.macro.mall.tiny.mbg.model.PmsBrandExample;importcom.macro.mall.tiny.service.PmsBrandService;importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.stereotype.Service;importjava.util.List;/**

* PmsBrandService实现类

* Created by macro on 2019/4/19.

*/@ServicepublicclassPmsBrandServiceImplimplementsPmsBrandService{@AutowiredprivatePmsBrandMapperbrandMapper;@OverridepublicListlistAllBrand(){returnbrandMapper.selectByExample(newPmsBrandExample());}@OverridepublicintcreateBrand(PmsBrandbrand){returnbrandMapper.insertSelective(brand);}@OverridepublicintupdateBrand(Longid,PmsBrandbrand){brand.setId(id);returnbrandMapper.updateByPrimaryKeySelective(brand);}@OverridepublicintdeleteBrand(Longid){returnbrandMapper.deleteByPrimaryKey(id);}@OverridepublicListlistBrand(intpageNum,intpageSize){PageHelper.startPage(pageNum,pageSize);returnbrandMapper.selectByExample(newPmsBrandExample());}@OverridepublicPmsBrandgetBrand(Longid){returnbrandMapper.selectByPrimaryKey(id);}}

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