關於java.lang.NoClassDefFoundError: org/springframework/util/unit/DataSize的問題 spring boot 開啓錯誤
今天在使用mybatis的基於springboot的框架的基礎功能包抽離出來的時候，在增加spring yml自定義設置後，在業務項目啓動時會報出以下異常。
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APPLICATION FAILED TO START
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Description:
Cannot determine embedded database driver class for database type NONE
Action:
If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (the profiles "dev,redis,config,mongodb,activemq,socketio" are currently active).
原因是需要在啓動類的@EnableAutoConfiguration或@SpringBootApplication中添加exclude = {DataSourceAutoConfiguration.class}，排除此類的autoconfig啓動以後就可以正常運行。
並且需要使用到
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>4.3.8.RELEASE</version>
</dependency>
上面兩個依賴，更新spring boot的版本
並且mybatis在某個版本後取消了sqlSessionFactory的自動注入，需要顯示注入。
然而設置這玩意兒是需要設置dataSource的，於是dataSource也得顯示聲明
單獨配置一個：
@Configuration
public class MybatisConfig {
@Autowired
private DataSourceProperties dataSourceProperties;
@Bean(name = "dataSource")
public DataSource dataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setUrl(dataSourceProperties.getUrl());
System.out.println(dataSourceProperties.getUrl());
dataSource.setDriverClassName(dataSourceProperties.getDriverClassName());
dataSource.setUsername(dataSourceProperties.getUsername());
dataSource.setPassword(dataSourceProperties.getPassword());
return dataSource;
}
public SqlSessionFactory sqlSessionFactory() throws Exception {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource());
return sqlSessionFactoryBean.getObject();
}
}
tips:
註釋：@MapperScan(basePackages = {“xxx.mapper.front”,“xxx,mapper.admin”,“xxx.mapper”})
意思爲：改註解內聲明對應包下的所有class都是Mapper類
通過使用@MapperScan可以指定要掃描的Mapper類的包的路徑