1.问题描述

启动报错

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

需要的依赖也导入了

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.17</version>
        </dependency>

数据库的配置也没问题的

server.port=9080
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.56.103/gulimall_pms?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root

mybatis-plus.mapper-locations=classpath:/mapper/**/*.xml
mybatis-plus.global-config.db-config.id-type=auto

2.原因发现

找了很久,发现是编译后resources目录里的文件没有出现在target目录下, 也就是resources未编译

因为我们运行时执行的是target目录下的文件, 而这里没有配置文件,所以报错了

3.解决方案

把 <packaging>pom</packaging>删掉

因为分模块管理，都会有一个父级项目，pom文件一个重要的属性就是packaging（打包类型），一般来说所有的父级项目的packaging都为pom，packaging默认类型jar类型，如果不做配置，maven会将该项目打成jar包

    <groupId>com.atguigu.gulimall</groupId>
    <artifactId>gulimall-product</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gulimall-product</name>
<!--    <packaging>pom</packaging>-->
    <description>谷粒商城-商品服务</description>
    <properties>

再次编译即可