数据管理系统：SpringBoot + MySql + mybatis 一、创建项目 1、File - New - Project - Spring Initializr - Next - A -Next - B - Next - C - Finish
A-> Group:com.itsdf07 A-> Artifact:itsdf07 A-> Package:com.itsdf07
B-> Web: Spring Web B-> Template Engines: Thymeleaf B-> SQL: MySQL Dirver\JDBC API\MyBatis Framework
C-> Project name:itsdf07
二、启动 1、运行项目启动类，程序入口:Itsdf07Application.java 备注:运行时，会报以下异常: Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2019-11-22 16:37:04.302 ERROR 13712 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
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).
Process finished with exit code 1
异常原因:因为我们创建Spring Boot项目时，在选择组件时添加了mysql、mybatis，但现在还没有配置数据库，导致项目启动报错。 解决方案: 1、在application.properties中进行配置 2、不采用1的方式，而采用更简洁的application.yml，配置如下: server: port: 8087
spring:
datasource:
name: test
url: jdbc:mysql://localhost:3306/itsdf07
username: root
password:
driver-class-name: com.mysql.jdbc.Driver
其中因为mysql默认是实用最新的，所以当前最新的是mysql是8.0.x,对应的驱动是
所以运行时会报以下异常：
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
解决方案：
2.1、降低数据库版本，即在pom.xml中对应的mysql降低版本
2.2、数据库的相关配置（driver-class-name），把com.mysql.jdbc.Driver替换成com.mysql.cj.jdbc.Driver
三、项目整合mybatis
mybatis: mapper-locations: classpath:mapper/*.xml #注意：一定要对应mapper映射xml文件的所在路径 type-aliases-package: com.aso.itsdf07.entity # 注意：对应实体类的路径
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