Caused by: java.lang.IllegalArgumentException: At least one JPA metamodel must be present!

柔光的暖阳◎ 2022-06-13 05:52 115阅读 0赞

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: At least one JPA metamodel must be present!

使用springboot做jdbcTemplate的注入时候，启动报错！！

原因：springboot已经配置了datasource的自动化配置，因为做了jpa的自动化配置去除导致

@Configuration
    @EnableAutoConfiguration(exclude = {
            MetricExportAutoConfiguration.class,
            SecurityAutoConfiguration.class,
            ManagementWebSecurityAutoConfiguration.class,
           DataSourceAutoConfiguration.class,
           HibernateJpaAutoConfiguration.class,
           DataSourceTransactionManagerAutoConfiguration.class,
            MetricExportAutoConfiguration.class
    })
    @ComponentScan
    @EnableDiscoveryClient
    @EnableAspectJAutoProxy(proxyTargetClass = true)
    @EnableFeignClients
    @EnableScheduling
    public class PackResolveServiceApp extends SpringBootServletInitializer {
    
        public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
            SpringApplication.run(PackResolveServiceApp.class, args);
        }
    
        @Override
        protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
            return application.sources(PackResolveServiceApp.class);
        }
    }

解决方式1：注释掉  EnableAutoConfiguration 中datasource和hibernate相关的autoConfig，开启自动化配置

在代码中就能使用jdbcTemplate：

@Autowired
        DataSource dataSource;
    
        @Bean
        public JdbcTemplate jdbcTemplate() {
            JdbcTemplate jdbcTemplate = new JdbcTemplate();
            try {
                jdbcTemplate.setDataSource(this.dataSource);
                jdbcTemplate.setLazyInit(false);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return jdbcTemplate;
        }

解决方式2：排除自动化配置，添加自定义配置文件，如下

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