mall整合SpringBoot+MyBatis搭建基本骨架的示例分析
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摘要
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(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);
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.boot spring-boot-starter-parent 2.1.3.RELEASE org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-actuator org.springframework.boot spring-boot-starter-aop org.springframework.boot spring-boot-starter-test test com.github.pagehelper pagehelper-spring-boot-starter 1.2.10 com.alibaba druid-spring-boot-starter 1.1.10 org.mybatis.generator mybatis-generator-core 1.3.3 mysql mysql-connector-java 8.0.15
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
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。
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 Listwarnings = 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); } } }
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 { }
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)); } }
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 { ListlistAllBrand(); int createBrand(PmsBrand brand); int updateBrand(Long id, PmsBrand brand); int deleteBrand(Long id); List listBrand(int pageNum, int pageSize); PmsBrand getBrand(Long id); }
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 ListlistAllBrand() { 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); return brandMapper.selectByExample(new PmsBrandExample()); } @Override public PmsBrand getBrand(Long id) { return brandMapper.selectByPrimaryKey(id); } }
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