基于Java配置Spring加Hibernate和再加SpringData时的差别

Z时代
2024-01-10
分类：综合

本文内容纲要：

- 先在类路径application.properties - 只使用Spring+Hibernate配置 - 使用Spring+Hibernate+SpringData配置

先在类路径application.properties

1 jdbc.driverClassName = org.postgresql.Driver 2 jdbc.url = jdbc:postgresql://localhost:5432/数据库 3 jdbc.username = 用户名 4 jdbc.password = 密码 5 6 hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect 7 hibernate.show_sql = true 8 hibernate.format_sql = true 9 hibernate.hbm2ddl.auto = update //自动更新数据库

只使用Spring+Hibernate配置

配置DataSource、LocalSessionFactoryBean、HibernateTransactionManager

import java.util.Properties;
import javax.sql.DataSource;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate5.HibernateTransactionManager;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@ComponentScan({"com.websystique.springmvc.configuration"}) //配置包名
@PropertySource(value = {"classpath:application.properties"})
public class HibernateConfiguration {
    @Autowired
    private Environment environment;
    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
        properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
        properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
        properties.put("hibernate.hbm2ddl.auto", environment.getRequiredProperty("hibernate.hbm2ddl.auto"));
        return properties;
    }
    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
        dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
        dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
        dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
        return dataSource;
    }
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[]{"com.websystique.springmvc.model"});
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }
    @Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory s) {
        HibernateTransactionManager txManager = new HibernateTransactionManager();
        txManager.setSessionFactory(s);
        return txManager;
    }
}

使用Spring+Hibernate+SpringData配置

配置：DataSource、LocalContainerEntityManagerFactoryBean、JpaTransactionManager

1 import org.springframework.beans.factory.annotation.Autowired;
 2 import org.springframework.context.annotation.Bean;
 3 import org.springframework.context.annotation.Configuration;
 4 import org.springframework.context.annotation.PropertySource;
 5 import org.springframework.core.annotation.Order;
 6 import org.springframework.core.env.Environment;
 7 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
 8 import org.springframework.jdbc.datasource.DriverManagerDataSource;
 9 import org.springframework.orm.jpa.JpaTransactionManager;
10 import org.springframework.orm.jpa.JpaVendorAdapter;
11 import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
12 import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
13 import org.springframework.transaction.annotation.EnableTransactionManagement;
14 
15 import javax.sql.DataSource;
16 import java.util.Properties;
17 
18 @Configuration
19 @EnableTransactionManagement
20 @EnableJpaRepositories({"com.example.repository"})  //持久层包名
21 @PropertySource(value = {"classpath:application.properties"})
22 public class HibernateConfig {
23 
24     @Autowired
25     private Environment environment;
26 
27     private Properties hibernateProperties() {
28         Properties properties = new Properties();
29         properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
30         properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
31         properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
32         properties.put("hibernate.hbm2ddl.auto",environment.getRequiredProperty("hibernate.hbm2ddl.auto"));
33         return properties;
34     }
35     @Bean
36     public DataSource dataSource() {
37         DriverManagerDataSource dataSource = new DriverManagerDataSource();
38         dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
39         dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
40         dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
41         dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
42         return dataSource;
43     }
44 
45     @Bean
46     public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
47         LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
48         entityManagerFactory.setDataSource(dataSource());
49         entityManagerFactory.setPackagesToScan(new String[] { "com.example.model" });
50         JpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
51         entityManagerFactory.setJpaVendorAdapter(jpaVendorAdapter);
52         entityManagerFactory.setJpaProperties(hibernateProperties());
53         return entityManagerFactory;
54     }
55 
56     @Bean
57     public JpaTransactionManager transactionManager() {
58         JpaTransactionManager transactionManager = new JpaTransactionManager();
59         transactionManager.setDataSource(dataSource());
60         transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
61         return transactionManager;
62     }
63 
64 }