SqlSessionFactoryBuilder、SqlSessionFactory 和 SqlSession SqlSessionFactoryBuilder SqlSessionFactory SqlSession...而 SqlSessionFactory 本身是由 SqlSessionFactoryBuilder 创建的,它可以从 XML、注解或手动配置 Java 代码来创建 SqlSessionFactory。...SqlSessionFactoryBuilder SqlSessionFactoryBuilder 有五个 build() 方法,每一种都允许你从不同的资源中创建一个 SqlSession 实例。...configuration.addMapper(BoundBlogMapper.class); configuration.addMapper(BoundAuthorMapper.class); SqlSessionFactoryBuilder...builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(configuration);
三、SqlSessionFactoryBuilder 引用Mybatis官方文档,构建SqlSessionFactory时会使用到SqlSessionFactoryBuilder。...因此SqlSessionFactoryBuilder的作用为构建SqlSessionFactory。...· SqlSessionFactoryBuilder源码 public class SqlSessionFactoryBuilder { //......六、总结 SqlSessionFactoryBuilder类的作用其实就是解析配置文件、创建SqlSessionFactory。...问题一:SqlSessionFactoryBuilder、SqlSessionFactory、SqlSession的作用域如何?
Resources.getResourceAsReader(resources); // 3.获取SqlSessionFactory SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder...第三步源码分析 // 3.获取SqlSessionFactory SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder...().build(reader); 进入SqlSessionFactoryBuilder()构造函数如下: public SqlSessionFactoryBuilder() { } 可知,无参构造函数没用做任何事情...this.configuration; } } 到这里,我们就结束了源码分析,下面总结下大体流程: 总结: 获取本地InputStreamReader对象(mybatis配置文件) 调用SqlSessionFactoryBuilder
SqlSessionFactory实例可以通过SqlSessionFactoryBuilder来构建。...在作用域内正确地使用SqlSessionFactoryBuilder、SqlSessionFactory、SqlSession会让我们避免多线程环境下并发所带来的问题。...首先我们来看User Guide对SqlSessionFactoryBuilder作用域以及生命周期的指导意见。...SqlSessionFactoryBuilder 这个类可以被实例化、使用和丢弃,一旦创建了 SqlSessionFactory,就不再需要它了。...因此 SqlSessionFactoryBuilder 实例的最佳范围是方法范围(也就是局部方法变量)。
源码分析 (建造者模式) 2.MybatisMapper接口绑定原理(代理设计模式) 目标一:SqlSessionFactoryBuilder源码分析 (建造者模式) 1.读取resources...2.进入SqlSessionFactoryBuilder()去看看无参构造函数做了什么事情,我们发现无参构造函数没有做什么事情,那么我们就点到build(reader)去看这个方法具体如何实现的。...我们发现SqlSessionFactoryBuilder , 通过XMLConfigBuilder解析mybatis配置文件内容。下面的代码都是对配置文件的解析过程。...SqlSessionFactory sqlMapper = new SqlSessionFactoryBuilder().build(reader); /* *创建 SqlSessionFactory...*/ public class SqlSessionFactoryBuilder { //第一步进入这个方法,Reader读取mybatis配置文件,传入构造方法 public SqlSessionFactory
文章目录 1、SqlSessionFactoryBuilder 2、SqlSessionFactory 3、SqlSession 4、Executor 5、StatementHandler 6、ResultSetHandler...从MyBatis开发步骤可以看出,MyBatis主要运用到了一下几个类 1、SqlSessionFactoryBuilder 每一个MyBatis的应用程序的入口是SqlSessionFactoryBuilder...没有必要每次访问Mybatis就创建一次SqlSessionFactoryBuilder,通常的做法是创建一个全局的对象就可以了。...示例程序如下: private static SqlSessionFactoryBuilder sqlSessionFactoryBuilder; private static SqlSessionFactory...= new SqlSessionFactoryBuilder(); sqlSessionFactory = sqlSessionFactoryBuilder.build(reader); }
先new一个SqlSessionFactoryBuilder(),得到一个返回值builder SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder...对象 SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); //3.调用builder对象的...对象 SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); //3.调用builder对象的...对象 SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); //3.调用builder对象的...对象 SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); //3.调用builder对象的
org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:79) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java...org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:89) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:77) ... 2 more Caused by: java.io.IOException: Could not find resource
快速入门 Mybatis的整体流程图 SqlSessionFactoryBuilder 每一个MyBatis的应用程序的入口是SqlSessionFactoryBuilder,它的作用是通过XML配置文件创建...没有必要每次访问Mybatis就创建一次SqlSessionFactoryBuilder,通常的做法是创建一个全局的对象就可以了。...示例程序如下: private static SqlSessionFactoryBuilder sqlSessionFactoryBuilder; private static SqlSessionFactory...= new SqlSessionFactoryBuilder(); sqlSessionFactory = sqlSessionFactoryBuilder.build(reader);...} SqlSessionFactory SqlSessionFactory对象由SqlSessionFactoryBuilder创建。
org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:82) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java...org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:92) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:80) ... 2 more Caused by: org.apache.ibatis.builder.BuilderException:
org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) > at > org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:80) > at > org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java
MyBatis 四大核心主要包括(SqlSessionFactoryBuilder、SqlSessionFactory、SqlSession、Mapper)。...MyBatis 作为互联网数据库映射工具界的“上古神器”,训有四大“神兽”,谓之:SqlSessionFactoryBuilder、SqlSessionFactory、SqlSession、Mapper...SqlSessionFactoryBuilder 从命名上可以看出,这个是一个 Builder 模式的,用于创建 SqlSessionFactory 的类。...SqlSessionFactoryBuilder 根据配置来构造 SqlSessionFactory。 其中配置方式有两种 1....environment); configuration.addMapper(BlogMapper.class); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder
构建器 SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder(); //3、解析 配置信息文件流...,并返回 defaultSessionFactory SqlSessionFactory defaultSessionFactory = sqlSessionFactoryBuilder.build(...构建器 //实例化 SqlSessionFactoryBuilder 构建器 SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder...,并返回 defaultSessionFactory SqlSessionFactory defaultSessionFactory = sqlSessionFactoryBuilder.build(...源码分析: sqlSessionFactoryBuilder.build(inputStream)方法,首先进入sqlSessionFactoryBuilder类, 调用当前类的SqlSessionFactory
而 SqlSessionFactory 本身是由 SqlSessionFactoryBuilder 创建的,它可以从 XML、注解或 Java 配置代码来创建 SqlSessionFactory。...reader = Resources.getResourceAsReader("mybatis-config.xml"); SqlSessionFactory factory = new SqlSessionFactoryBuilder...//用完了又放回连接池中 SqlSessionFactoryBuilder 创建出SqlSessionFactory,然后从SqlSessionFactory中得到SqlSession,最后通过SqlSession...我们打个断点.来跟踪SqlSessionFactoryBuilder的源代码: F7跟进 发现一堆build 而我们现在用的是传入reader的那个方法 我们可以看到,他帮我们传了2个Null参数给下一个...我们来试试 //使用传入Configuration方式创建SqlSessionFactoryBuilder @Test public void testMyBatisBuild1()
SqlSessionFactoryBuilder 这个类可以被实例化、使用和丢弃,一旦创建了 SqlSessionFactory,就不再需要它了。...因此 SqlSessionFactoryBuilder 实例的最佳作用域是方法作用域(也就是局部方法变量)。...你可以重用 SqlSessionFactoryBuilder 来创建多个 SqlSessionFactory 实例,但最好还是不要一直保留着它,以保证所有的 XML 解析资源可以被释放给更重要的事情。...sqlSessionFactory; /** * 类加载时初始化sqlSessionFactory对象 */ static { try { SqlSessionFactoryBuilder...sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder(); sqlSessionFactory = sqlSessionFactoryBuilder.build
sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder(); //2.创建sqlSessionFactor对象...static void main(String[] args) { SqlSession sqlSession = null; try { // 1.创建SqlSessionFactoryBuilder...对象 SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();...// 2.创建SqlSessionFactory对象 SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build...sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder(); sqlSessionFactory = sqlSessionFactoryBuilder.build
MyBatis核心类 1、SqlSessionFactoryBuilder 每一个MyBatis的应用程序的入口是SqlSessionFactoryBuilder。...没有必要每次访问Mybatis就创建一次SqlSessionFactoryBuilder,通常的做法是创建一个全局的对象就可以了。...示例程序如下: private static SqlSessionFactoryBuilder sqlSessionFactoryBuilder; private static SqlSessionFactory...= new SqlSessionFactoryBuilder(); sqlSessionFactory = sqlSessionFactoryBuilder.build(reader)...2、SqlSessionFactory对象由SqlSessionFactoryBuilder创建: 它的主要功能是创建SqlSession对象,和SqlSessionFactoryBuilder对象一样
mybatis提供的映射方式,自由灵活生成满足的SQL语句;可以将preparedStatement中的输入参数自行自动输入映射,将查询结果集灵活映射成Java对象(输出映射) Mybatis架构 sqlSessionFactoryBuilder...通过sqlSessionFactoryBuilder创建会话工厂sqlSessionFactory 将sqlSessionFactoryBuilder当成一个工具类使用,不需要使用单例模式管理,在需要...sqlSessionFactory时,只需要new一次sqlSessionFactoryBuilder就行了 sqlSessionFactory 通过sqlSessionFactory创建sqlSession...mybatis-config.xml"; InputStream inputStream=Resources.getResourceAsStream(resource); sqlSessionFactory=new SqlSessionFactoryBuilder...mybatis-config.xml"; InputStream inputStream=Resources.getResourceAsStream(resource); sqlSessionFactory=new SqlSessionFactoryBuilder
org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:82) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java...org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:92) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build...(SqlSessionFactoryBuilder.java:80) ... 25 more Caused by: java.io.IOException: Could not find resource
IOException e) { e.printStackTrace(); } SqlSessionFactory sqlMapper=new SqlSessionFactoryBuilder...IOException e) { e.printStackTrace(); } SqlSessionFactory sqlMapper=new SqlSessionFactoryBuilder...IOException e) { e.printStackTrace(); } SqlSessionFactory sqlMapper=new SqlSessionFactoryBuilder...IOException e) { e.printStackTrace(); } SqlSessionFactory sqlMapper=new SqlSessionFactoryBuilder...IOException e) { e.printStackTrace(); } SqlSessionFactory sqlMapper=new SqlSessionFactoryBuilder
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