用eclipselink来取代hibernate

小鱼儿 2023-02-28 11:16 9阅读 0赞

hibernate是我们常见的实现jpa的全orm框架，可是eclipselink才是完全符合j2ee规范的标准jpa实现。也是官方推荐的jpa实现。下面就来写一个替代hibernate,整合springboot的例子。

先引入pom依赖，在jpa中排除掉hibernate的依赖，引入eclipselink的依赖。

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
                
                <exclusions>
                    <exclusion>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-core</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-entitymanager</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.eclipse.persistence</groupId>
                <artifactId>eclipselink</artifactId>
                <version>2.5.0-RC1</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.eclipse.persistence</groupId>
                        <artifactId>commonj.sdo</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>

然后要添加一个配置类JpaDataSourceConfiguration

@Configuration
    @EntityScan(basePackages = "com.example.demo.entity")
    @EnableJpaRepositories(basePackages = "com.example.demo.repository")
    public class JpaDataSourceConfiguration extends JpaBaseConfiguration {
    
        protected JpaDataSourceConfiguration(DataSource dataSource, JpaProperties properties, ObjectProvider<JtaTransactionManager> jtaTransactionManager, ObjectProvider<TransactionManagerCustomizers> transactionManagerCustomizers) {
            super(dataSource, properties, jtaTransactionManager, transactionManagerCustomizers);
        }
    
    
        @Override
        protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
            return new EclipseLinkJpaVendorAdapter();
        }
    
        @Override
        protected Map<String, Object> getVendorProperties(){
            Map<String, Object> map = new HashMap<>();
            map.put("eclipselink.weaving", "false");
            map.put("eclipselink.ddl-generation", "none");
            return map;
        }
    }

有了这两个之后，其余的就按照jpa的操作进行就行了，构建repository继承JpaRepository即可操作数据库了。