MyBatis之SqlSessionFactoryBuilder

忘是亡心i 2022-05-14 03:15 166阅读 0赞

## MyBatis官方文档 ##

>  *  [MyBatis官方文档][MyBatis]
>  *  ORM框架
>  *  SqlSessionFactory的创建通过SqlSessionFactoryBuilder来实现

## 源码 ##

package org.apache.ibatis.session;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.Reader;
    import java.util.Properties;
    
    import org.apache.ibatis.builder.xml.XMLConfigBuilder;
    import org.apache.ibatis.exceptions.ExceptionFactory;
    import org.apache.ibatis.executor.ErrorContext;
    import org.apache.ibatis.session.defaults.DefaultSqlSessionFactory;
    
    /** * Builds {@link SqlSession} instances. * @author Clinton Begin */
    public class SqlSessionFactoryBuilder { 
    
      public SqlSessionFactory build(Reader reader) { 
        return build(reader, null, null);
      }
    
      public SqlSessionFactory build(Reader reader, String environment) { 
        return build(reader, environment, null);
      }
    
      public SqlSessionFactory build(Reader reader, Properties properties) { 
        return build(reader, null, properties);
      }
    
      public SqlSessionFactory build(Reader reader, String environment, Properties properties) { 
        try { 
          // 解析MyBatis配置文件，创建SqlSessionFactory对象
          XMLConfigBuilder parser = new XMLConfigBuilder(reader, environment, properties);
          return build(parser.parse());
        } catch (Exception e) { 
          throw ExceptionFactory.wrapException("Error building SqlSession.", e);
        } finally { 
          ErrorContext.instance().reset();
          try { 
            reader.close();
          } catch (IOException e) { 
            // Intentionally ignore. Prefer previous error.
          }
        }
      }
    
      public SqlSessionFactory build(InputStream inputStream) { 
        return build(inputStream, null, null);
      }
    
      public SqlSessionFactory build(InputStream inputStream, String environment) { 
        return build(inputStream, environment, null);
      }
    
      public SqlSessionFactory build(InputStream inputStream, Properties properties) { 
        return build(inputStream, null, properties);
      }
    
      public SqlSessionFactory build(InputStream inputStream, String environment, Properties properties) { 
        try { 
          XMLConfigBuilder parser = new XMLConfigBuilder(inputStream, environment, properties);
          return build(parser.parse());
        } catch (Exception e) { 
          throw ExceptionFactory.wrapException("Error building SqlSession.", e);
        } finally { 
          ErrorContext.instance().reset();
          try { 
            inputStream.close();
          } catch (IOException e) { 
            // Intentionally ignore. Prefer previous error.
          }
        }
      }
        
      public SqlSessionFactory build(Configuration config) { 
        return new DefaultSqlSessionFactory(config);
      }
    
    }

[MyBatis]: http://www.mybatis.org/mybatis-3/zh/getting-started.html