SpringBoot2.x踩坑集合第二彈

一、Failed to bind properties under ‘spring.datasource’ to javax.sql.DataSource

看的是尚硅谷的視頻，springboot整合druid數據源時產生的問題：

參考：https://blog.csdn.net/xingkongtianma01/article/details/81624313

導入log4j的依賴或者刪除配置文件中的log4j即可。

二、連接數據庫出現The server time zone value ‘�й���׼ʱ��’ is unrecogni等問題的解決方案

這個問題和mysql驅動版本太高有關，按照如下修改連接配置即可：

    driver-class-name: com.mysql.cj.jdbc.Driver 
    url: jdbc:mysql://localhost:3306/springboot?serverTimezone=UTC

三、SpringBoot2.x版本自動建表

參考：https://blog.csdn.net/weixin_41334434/article/details/90380540

• 指定腳本路徑：classpath:sql/department.sql
• initialization-mode: always

spring:
  datasource:
    #   數據源基本配置
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/springboot?serverTimezone=UTC
    type: com.alibaba.druid.pool.DruidDataSource
    #   數據源其他配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #   配置監控統計攔截的filters，去掉後監控界面sql無法統計，'wall'用於防火牆
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
    schema:
      - classpath:sql/department.sql
      - classpath:sql/employee.sql
    initialization-mode: always

四、Springboot與Mybatis整合相關配置問題（以駝峯命名爲例）

參考：https://www.jianshu.com/p/1507a47f43ac

【配置properties或yml】

#application.yml
mybatis:
  configuration:
    map-underscore-to-camel-case: true

【配置Customizer】

@org.springframework.context.annotation.Configuration
public class MyBatisConfig {

    @Bean
    public ConfigurationCustomizer configurationCustomizer(){
        return new ConfigurationCustomizer() {
            @Override
            public void customize(Configuration configuration) {
                configuration.setMapUnderscoreToCamelCase(true);
            }
        };
    }
}