SpringBoot实战电商项目mall（20k+star）地址： https://github.com/macrozheng/mall
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/downloa...
- 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/xiaza...
- 创建数据库mall
- 导入mall的数据库脚本，脚本地址：https://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); 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
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);
}
}
} 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 {
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);
}
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);
return brandMapper.selectByExample(new PmsBrandExample());
}
@Override
public PmsBrand getBrand(Long id) {
return brandMapper.selectByPrimaryKey(id);
}
}
项目源码地址
https://github.com/macrozheng/mall-learning/tree/master/mall-tiny-01
公众号
mall项目全套学习教程连载中，关注公众号第一时间获取。
