atitit.動態(tài)加載數(shù)據(jù)庫配置in?orm

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1.?動態(tài)加載數(shù)據(jù)庫配置的優(yōu)點(diǎn)::: 1

1.1.?組合多個(gè)配置文件... 1

1.2.?連接多個(gè)數(shù)據(jù)庫 1

2.?基本的流程:::getCfg內(nèi)存對象,,,,生成工廠類,在opoenSession 1

2.1.?Hibernate動態(tài)添加配置流程 1

2.2.?mybatis動態(tài)添加配置流程 1

2.3.?#===hb?code 2

3.?參考 3

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1.?動態(tài)加載數(shù)據(jù)庫配置的優(yōu)點(diǎn):::

1.1.?組合多個(gè)配置文件...

1.2.?連接多個(gè)數(shù)據(jù)庫

2.?基本的流程:::getCfg內(nèi)存對象,,,,生成工廠類,在opoenSession

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

轉(zhuǎn)載請注明來源：?http://blog.csdn.net/attilax

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2.1.?Hibernate動態(tài)添加配置流程

原理配置configuration對象...是配置文件的java對象映射....再也configuration.buildSessionFactory();

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configuration.configure(propertyFile);

configuration.setProperty("connection.url",?connection_url);

sessionFactory?=?configuration.buildSessionFactory();

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2.2.?mybatis動態(tài)添加配置流程

·??properties.setProperty("jdbc.password",?"動態(tài)設(shè)置");??

·????

·??//加載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();??

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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"));

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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();

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//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);

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configuration.setProperty("hibernate.connection.url",

connection_url);

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configuration.setProperty("hibernate.connection.driver_class",

driverClass);

configuration

.setProperty("hibernate.connection.username",?username);

?

configuration

.setProperty("hibernate.connection.password",?password);

//end?o8j

//當(dāng)然，除了指定的XML文件外，還可以指定被映射的類，讓Hibernate幫你尋找映射定義文件：

//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();

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throw?new?RuntimeException(e);

??//ati?o8j

}

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3.?參考

MyBatis動態(tài)連接數(shù)據(jù)庫，動態(tài)傳入數(shù)據(jù)庫參數(shù)?-?海濤的CSDN博客?-?博客頻道?-?CSDN.NET.htm

轉(zhuǎn)載于:https://www.cnblogs.com/attilax/p/5963883.html

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