atitit.动态加载数据库配置in orm hibernate mybatis

atitit.动态加载数据库配置in orm

 

1. 动态加载数据库配置的优点:::
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1.1. 重组多只布局文件…
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1.2. 连接多个数据库
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2. 中坚的流程:::getCfg内存对象,,,,生成工厂类,在opoenSession
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2.1. Hibernate动态增长配置流程
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2.2. mybatis动态增长配置流程
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2.3. #===hb code
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3. 参考 3

 

1. 动态加载数据库配置的亮点:::

1.1. 重组多单布局文件…

1.2. 连多只数据库

2. 骨干的流程:::getCfg内存对象,,,,生成工厂类,在opoenSession

 

作者:: 老哇的爪子 Attilax 艾龙,  EMAIL:1466519819@qq.com

转载请注明来源: http://blog.csdn.net/attilax

 

2.1. Hibernate动态增长配置流程

原理配置configuration对象…是布置文件之java对象映射….再为configuration.buildSessionFactory();

 

=============

configuration.configure(propertyFile);

configuration.setProperty(“connection.url”, connection_url);

sessionFactory = configuration.buildSessionFactory();

 

2.2. mybatis动态增长配置流程

·  properties.setProperty(“jdbc.password”, “动态设置”);  

·    

·  //加载mybatis配置文件以及投文件  

·  String resource = “mybatis/mybatis-config.xml”;  

·  Reader reader = Resources.getResourceAsReader(resource);  

·  SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();  

·  SqlSessionFactory factory = builder.build(reader, properties);  

·  SqlSession session = factory.openSession();  

 

2.3. #===hb code

static  {

    try {

    

configuration.configure(propertyFile);

// o8j

Properties properties = new Properties();

properties.load(new InputStreamReader(new FileInputStream(pathx

.classPath() + “/jdbc.properties”), “utf-8”));

 

String username = properties.getProperty(“jdbc.username”).trim();

String password = properties.getProperty(“jdbc.password”);

String driverClass = properties.getProperty(“jdbc.driverClassName”)

.trim();

String connection_url = properties.getProperty(“jdbc.url”).trim();

 

//configuration.setProperties(properties);

configuration.setProperty(“connection.driver_class”, driverClass);

configuration.setProperty(“connection.url”, connection_url);

configuration.setProperty(“connection.username”, username);

configuration.setProperty(“connection.password”, password);

 

configuration.setProperty(“hibernate.connection.url”,

connection_url);

 

configuration.setProperty(“hibernate.connection.driver_class”,

driverClass);

configuration

.setProperty(“hibernate.connection.username”, username);

 

configuration

.setProperty(“hibernate.connection.password”, password);

//end o8j

//当然,除了指定的XML文件外,还好指定给射的切近,让Hibernate帮您追寻映射定义文件:

//configuration.addClass(GvMaterial.class);

//configuration.addAnnotatedClass(GvMaterial.class);

// configuration.set

//configuration.addResource(resourceName) 

sessionFactory = configuration.buildSessionFactory();

} catch (Exception e) {

System.err

.println(“%%%% Error Creating SessionFactory %%%%”);

e.printStackTrace();

 

throw new RuntimeException(e);

  //ati o8j

}

 

3. 参考

MyBatis动态连接数据库,动态传入数据库参数 – 海涛的CSDN博客 – 博客频道 – CSDN.NET.htm

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