搭建项目
选择java版本和项目类型
添加项目依赖
这三个貌似没有用,删掉
pom.xml
<?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>com.littlebear</groupId>
<artifactId>shop</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>shop</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
添加以下依赖
<!-- 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.5</version>
</dependency>
<!-- alibaba的druid数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>
项目结构
image.png
项目启动类加上包扫描
image.png
配置文件,改成yml格式，把application.properties后缀改成yml即可
spring:
datasource:
name: shop
type: com.alibaba.druid.pool.DruidDataSource
#druid相关配置
druid:
#监控统计拦截的filters
filters: stat
driver-class-name: com.mysql.jdbc.Driver
#基本属性
url: jdbc:mysql://127.0.0.1:3306/shop?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&userSSL=false
username: root
password: root
#配置初始化大小/最小/最大
initial-size: 1
min-idle: 1
max-active: 20
#获取连接等待超时时间
max-wait: 60000
#间隔多久进行一次检测，检测需要关闭的空闲连接
time-between-eviction-runs-millis: 60000
#一个连接在池中最小生存的时间
min-evictable-idle-time-millis: 300000
validation-query: SELECT 'x'
test-while-idle: true
test-on-borrow: false
test-on-return: false
#打开PSCache，并指定每个连接上PSCache的大小。oracle设为true，mysql设为false。分库分表较多推荐设置为false
pool-prepared-statements: false
max-pool-prepared-statement-per-connection-size: 20
mybatis:
mapper-locations: classpath:mybatis/mapper/*Mapper.xml
type-aliases-package: com.littlebear.model
#pagehelper
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
returnPageInfo: check
添加目录
image.png
创建数据库表
-- 类目
create table `product_category` (
`category_id` int not null auto_increment,
`category_name` varchar(64) not null comment '类目名字',
`category_type` int not null comment '类目编号',
`create_time` timestamp default current_timestamp comment '创建时间',
`update_time` timestamp default current_timestamp on update current_timestamp comment '修改时间',
primary key (`category_id`)
);
-- 商品
create table `product_info` (
`product_id` varchar(32) not null,
`product_name` varchar(64) not null comment '商品名称',
`product_price` decimal(8,2) not null comment '单价',
`product_stock` int not null comment '库存',
`product_description` varchar(64) comment '描述',
`product_icon` varchar(512) comment '小图',
`product_status` int DEFAULT '0' COMMENT '商品状态,0正常1下架',
`category_type` int not null comment '类目编号',
`create_time` timestamp default current_timestamp comment '创建时间',
`update_time` timestamp default current_timestamp on update current_timestamp comment '修改时间',
primary key (`product_id`)
);
-- 订单
create table `order_master` (
`order_id` varchar(32) not null,
`buyer_name` varchar(32) not null comment '买家名字',
`buyer_phone` varchar(32) not null comment '买家电话',
`buyer_address` varchar(128) not null comment '买家地址',
`buyer_openid` varchar(64) not null comment '买家微信openid',
`order_amount` decimal(8,2) not null comment '订单总金额',
`order_status` int not null default '0' comment '订单状态, 默认为新下单',
`pay_status` int not null default '0' comment '支付状态, 默认未支付',
`create_time` timestamp default current_timestamp comment '创建时间',
`update_time` timestamp ndefault current_timestamp on update current_timestamp comment '修改时间',
primary key (`order_id`),
key `idx_buyer_openid` (`buyer_openid`)
);
-- 订单商品
create table `order_item` (
`order_item_id` varchar(32) not null,
`order_id` varchar(32) not null,
`product_id` varchar(32) not null,
`product_name` varchar(64) not null comment '商品名称',
`product_price` decimal(8,2) not null comment '当前价格,单位分',
`product_quantity` int not null comment '数量',
`product_icon` varchar(512) comment '小图',
`create_time` timestamp default current_timestamp comment '创建时间',
`update_time` timestamp default current_timestamp on update current_timestamp comment '修改时间',
primary key (`order_item_id`),
key `idx_order_id` (`order_id`)
);
-- 用户
create table `user_info` (
`id` varchar(32) not null,
`username` varchar(32) not null,
`password` varchar(32) not null,
`openid` varchar(64) not null comment '微信openid',
`role` int not null comment '1买家 2卖家',
`create_time` timestamp default current_timestamp comment '创建时间',
`update_time` timestamp default current_timestamp on update current_timestamp comment '修改时间',
primary key (`id`)
) comment '用户信息表';
-- 卖家(登录后台使用, 卖家登录之后可能直接采用微信扫码登录，不使用账号密码)
create table `seller_info` (
`id` varchar(32) not null,
`username` varchar(32) not null,
`password` varchar(32) not null,
`openid` varchar(64) not null comment '微信openid',
`create_time` timestamp not null default current_timestamp comment '创建时间',
`update_time` timestamp not null default current_timestamp on update current_timestamp comment '修改时间',
primary key (`id`)
) comment '卖家信息表';
利用Mybatis代码生成工具,生成model,mapper(interface),xml(映射文件),内含基本的crud
image.png
编写controller
package com.littlebear.controller;
import com.littlebear.constant.ServerResponse;
import com.littlebear.model.ProductCategory;
import com.littlebear.service.IProductCategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
/**
* @author: shenhelin
* describe: 商品类目服务
* creat_date: 2018/7/12
* creat_time: 02:18
**/
@RestController
@RequestMapping("/productCategory")
public class ProductCategoryController {
@Autowired
IProductCategoryService productCategoryService;
@RequestMapping("/add.do")
public ServerResponse getTicketsDetail(ProductCategory productCategory) {
return productCategoryService.insert(productCategory);
}
@RequestMapping("list.do")
public ServerResponse list(@RequestParam(value = "pageNum",defaultValue = "1") int pageNum,
@RequestParam(value = "pageSize",defaultValue = "10") int pageSize){
return productCategoryService.selectList(pageNum,pageSize);
}
}
base-service
package com.hllcve.springbootdemo.service;
import com.github.pagehelper.PageInfo;
import com.hllcve.springbootdemo.constant.ServerResponse;
import java.io.Serializable;
import java.util.List;
/**
* @param <T>
* @param <PK>
* @author SHL
*/
public interface BaseService<T, PK extends Serializable> {
ServerResponse<String> deleteByPrimaryKey(PK id);
ServerResponse<String> insert(T obj);
ServerResponse<String> insertSelective(T obj);
ServerResponse<T> selectByPrimaryKey(PK id);
ServerResponse<T> updateByPrimaryKeySelective(T obj);
ServerResponse<T> updateByPrimaryKey(T obj);
ServerResponse<String> insertBatch(List<T> list);
ServerResponse<List<T>> selectListByCondition(T obj);
ServerResponse<List<T>> selectList();
ServerResponse<PageInfo<T>> selectList(int pageNum, int pageSize);
ServerResponse<T> selectByCondition(T obj);
ServerResponse<PageInfo<T>> selectListByCondition(T obj, int pageNum, int pageSize);
}
service
package com.hllcve.springbootdemo.service;
import com.hllcve.springbootdemo.constant.ServerResponse;
import com.hllcve.springbootdemo.model.ProductCategory;
import java.util.List;
import java.util.Map;
public interface IProductCategoryService extends BaseService<ProductCategory, Integer> {
ServerResponse<List<ProductCategory>> selectListByColumnIn(Map<String, Object> map);
}
service-impl
package com.littlebear.service.impl;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.littlebear.constant.ServerResponse;
import com.littlebear.mapper.ProductCategoryMapper;
import com.littlebear.model.ProductCategory;
import com.littlebear.service.IProductCategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
/**
* @author: shenhelin
* describe: ProductCategoryServiceImpl
* creat_date: 2018/7/12
* creat_time: 02:19
**/
@Service
public class ProductCategoryServiceImpl implements IProductCategoryService {
@Autowired
private ProductCategoryMapper productCategoryMapper;
@Override
public ServerResponse<String> deleteByPrimaryKey(Integer id) {
return null;
}
@Override
@Transactional
public ServerResponse<String> insert(ProductCategory obj) {
int rowCount = productCategoryMapper.insert(obj);
if(rowCount > 0){
return ServerResponse.createBySuccess("添加品类成功");
}
return ServerResponse.createByErrorMessage("添加品类失败");
}
@Override
public ServerResponse<String> insertSelective(ProductCategory obj) {
return null;
}
@Override
@Transactional(readOnly = true)
public ServerResponse<ProductCategory> selectByPrimaryKey(Integer id) {
ProductCategory productCategory = productCategoryMapper.selectByPrimaryKey(1);
if(productCategory == null){
return ServerResponse.createByErrorMessage("未查询到相关数据");
}
return ServerResponse.createBySuccess(productCategory);
}
@Override
public ServerResponse<ProductCategory> updateByPrimaryKeySelective(ProductCategory obj) {
return null;
}
@Override
public ServerResponse<ProductCategory> updateByPrimaryKey(ProductCategory obj) {
return null;
}
@Override
public ServerResponse<ProductCategory> selectByCondition(ProductCategory obj) {
return null;
}
@Override
public ServerResponse<PageInfo<ProductCategory>> selectListByCondition(ProductCategory obj, int pageNum, int pageSize) {
return null;
}
@Override
public ServerResponse<List<ProductCategory>> selectListByCondition(ProductCategory obj) {
return null;
}
@Override
public ServerResponse<List<ProductCategory>> selectList() {
return null;
}
/**
* 分页插件pagehelper的用法
* @param pageNum
* @param pageSize
* @return
*/
@Override
@Transactional(readOnly = true)
public ServerResponse<PageInfo<ProductCategory>> selectList(int pageNum, int pageSize) {
PageHelper.startPage(pageNum,pageSize);
List<ProductCategory> productCategoryList = productCategoryMapper.selectList();
PageInfo pageResult = new PageInfo(productCategoryList);
return ServerResponse.createBySuccess(pageResult);
}
@Override
public ServerResponse<String> insertBatch(List<ProductCategory> list) {
return null;
}
}
mapper.xml
<?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.hllcve.springbootdemo.mapper.ProductCategoryMapper" >
<resultMap id="BaseResultMap" type="com.hllcve.springbootdemo.model.ProductCategory" >
<constructor >
<idArg column="category_id" jdbcType="INTEGER" javaType="java.lang.Integer" />
<arg column="category_name" jdbcType="VARCHAR" javaType="java.lang.String" />
<arg column="category_type" jdbcType="INTEGER" javaType="java.lang.Integer" />
<arg column="create_time" jdbcType="TIMESTAMP" javaType="java.util.Date" />
<arg column="update_time" jdbcType="TIMESTAMP" javaType="java.util.Date" />
</constructor>
</resultMap>
<sql id="Base_Column_List" >
category_id, category_name, category_type, create_time, update_time
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from product_category
where category_id = #{categoryId,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from product_category
where category_id = #{categoryId,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.hllcve.springbootdemo.model.ProductCategory" >
insert into product_category (category_id, category_name, category_type)
values (#{categoryId,jdbcType=INTEGER}, #{categoryName,jdbcType=VARCHAR}, #{categoryType,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" parameterType="com.hllcve.springbootdemo.model.ProductCategory" >
insert into product_category
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="categoryId != null" >
category_id,
</if>
<if test="categoryName != null" >
category_name,
</if>
<if test="categoryType != null" >
category_type,
</if>
<if test="createTime != null" >
create_time,
</if>
<if test="updateTime != null" >
update_time,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="categoryId != null" >
#{categoryId,jdbcType=INTEGER},
</if>
<if test="categoryName != null" >
#{categoryName,jdbcType=VARCHAR},
</if>
<if test="categoryType != null" >
#{categoryType,jdbcType=INTEGER},
</if>
<if test="createTime != null" >
#{createTime,jdbcType=TIMESTAMP},
</if>
<if test="updateTime != null" >
#{updateTime,jdbcType=TIMESTAMP},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.hllcve.springbootdemo.model.ProductCategory" >
update product_category
<set >
<if test="categoryName != null" >
category_name = #{categoryName,jdbcType=VARCHAR},
</if>
<if test="categoryType != null" >
category_type = #{categoryType,jdbcType=INTEGER},
</if>
<if test="createTime != null" >
create_time = #{createTime,jdbcType=TIMESTAMP},
</if>
<if test="updateTime != null" >
update_time = #{updateTime,jdbcType=TIMESTAMP},
</if>
</set>
where category_id = #{categoryId,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.hllcve.springbootdemo.model.ProductCategory" >
update product_category
set category_name = #{categoryName,jdbcType=VARCHAR},
category_type = #{categoryType,jdbcType=INTEGER},
create_time = #{createTime,jdbcType=TIMESTAMP},
update_time = #{updateTime,jdbcType=TIMESTAMP}
where category_id = #{categoryId,jdbcType=INTEGER}
</update>
<select id="selectList" resultMap="BaseResultMap">
select
<include refid="Base_Column_List"/>
from product_category
</select>
</mapper>
编写完controller和service后的结构
启动成功
image.png
接口调用成功
add.do
list.do 分页查询
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