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

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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::: 1
1.1. 组合多个配置文件... 1
1.2. 连接多个数据库 1
2. 基本的流程:::getCfg内存对象,,,,生成工厂类,在opoenSession 1
2.1. Hibernate动态添加配置流程 1
2.2. mybatis动态添加配置流程 1
2.3. #===hb code 2
3. 参考 3

1. 动态加载数据库配置的优点:::1.1. 组合多个配置文件...1.2. 连接多个数据库2. 基本的流程:::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.iyunv.com/attilax

2.1. Hibernate动态添加配置流程原理配置configuration对象...是配置文件的java对象映射....再也configuration.buildSessionFactory();

=============
configuration.configure(propertyFile);
configuration.setProperty("connection.url", connection_url);
sessionFactory = configuration.buildSessionFactory();

2.2. mybatis动态添加配置流程·  properties.setProperty("jdbc.password", "动态设置");  
·   
·  //加载mybatis配置文件和映射文件  
·  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 codestatic  {
    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，还可以指定被映射的类，让Hibernate帮你寻找映射定义文件：
//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
}