Spring Framework自动连接

Question

我开始在spring Framework.I上工作，我不理解一些points.For示例，我写了一个hibernateConfig文件，但是我不理解Spring初始化环境对象的位置？我怎样才能达到它的方法呢？

我的配置类：

 package com.ugur.train.configuration;
 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.hibernate4.HibernateTransactionManager;
 import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
 import 
  org.springframework.transaction.annotation.EnableTransactionManagement;

 @Configuration
 @EnableTransactionManagement
 @ComponentScan({ "com.ugur.train.configuration" })
 @PropertySource(value = { "classpath:application.properties" })
  public class HibernateConfiguration {
      @Autowired 
    private Environment environment;  

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[] { "com.huawei.train.model" });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
     }

    @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;
    }

    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"));
        return properties;        
    }

    @Bean
    @Autowired 
    public HibernateTransactionManager transactionManager(SessionFactory s) {


       HibernateTransactionManager txManager = new HibernateTransactionManager();
       txManager.setSessionFactory(s);
       return txManager;
    }
 }

Answer 1

在@Configuration中，使用属性的推荐方法是使用环境和@PropertySource作为

@PropertySource(value = { "classpath:application.properties" })

将环境注入为

@Inject
private Environment environment;

将此类添加到@ContextConfiguration中的初始化器列表中

环境对象在您定义@PropertySource时被初始化