SpringBoot 启动的时候提示 Field *** in *** required a bean named 'entityManagerFactory' that could not be found.

错误截图

后面发现原来和入口类代码有关。

//@SpringBootApplication(scanBasePackages = {"org.jzc.odata.cboard","org.jzc.odata.cboard.odataservice","com.sdl.odata.api.service","com.sdl.odata.api.service.ODataService"})
@EnableAutoConfiguration(exclude = {HibernateJpaAutoConfiguration.class
        , DataSourceAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class })
@Configuration
@Import({
        ODataDataSourceConfiguration.class,
        ODataServiceConfiguration.class
})
@ComponentScan
@RestController
@ComponentScan(basePackages = {"org.jzc.odata.cboard","org.jzc.odata.cboard.odataservice","com.sdl.odata.api.service","com.sdl.odata.api.service.ODataService"})
public class ServiceContainer {

其中

@EnableAutoConfiguration(exclude = {HibernateJpaAutoConfiguration.class
        , DataSourceAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class })

这段的解释如下，

参考

https://stackoverflow.com/questions/45350546/entitymanagerfactory-not-found-in-springboot

也就是说，不去掉@EnableAutoConfiguration 和里面exclude 包含对EntityManagerFactory 的注释的话，EntityManagerFactory是不会被实例化的，这样肯定就不能发现entityManagerFactory的Bean了。

那么解决方案就是把这段注释掉，重新编译打包

//@SpringBootApplication(scanBasePackages = {"org.jzc.odata.cboard","org.jzc.odata.cboard.odataservice","com.sdl.odata.api.service","com.sdl.odata.api.service.ODataService"})
//@EnableAutoConfiguration(exclude = {HibernateJpaAutoConfiguration.class
//        , DataSourceAutoConfiguration.class,
//        DataSourceTransactionManagerAutoConfiguration.class })
@Configuration
@Import({
        ODataDataSourceConfiguration.class,
        ODataServiceConfiguration.class
})
@ComponentScan
@RestController
@ComponentScan(basePackages = {"org.jzc.odata.cboard","org.jzc.odata.cboard.odataservice","com.sdl.odata.api.service","com.sdl.odata.api.service.ODataService"})
public class ServiceContainer {

再运行，成功了！